Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (43 commits)
bnx2: Eliminate AER error messages on systems not supporting it
cnic: Fix big endian bug
xfrm6: Don't forget to propagate peer into ipsec route.
tg3: Use new VLAN code
bonding: update documentation - alternate configuration.
TCP: fix a bug that triggers large number of TCP RST by mistake
MAINTAINERS: remove Reinette Chatre as iwlwifi maintainer
rt2x00: add device id for windy31 usb device
mac80211: fix a crash in ieee80211_beacon_get_tim on change_interface
ipv6: Revert 'administrative down' address handling changes.
textsearch: doc - fix spelling in lib/textsearch.c.
USB NET KL5KUSB101: Fix mem leak in error path of kaweth_download_firmware()
pch_gbe: don't use flush_scheduled_work()
bnx2: Always set ETH_FLAG_TXVLAN
net: clear heap allocation for ethtool_get_regs()
ipv6: Always clone offlink routes.
dcbnl: make get_app handling symmetric for IEEE and CEE DCBx
tcp: fix bug in listening_get_next()
inetpeer: Use correct AVL tree base pointer in inet_getpeer().
GRO: fix merging a paged skb after non-paged skbs
...

Documentation/ABI/testing/sysfs-platform-at91

···
+What:		/sys/devices/platform/at91_can/net/<iface>/mb0_id
+Date:		January 2011
+KernelVersion:	2.6.38
+Contact:	Marc Kleine-Budde <[e-mail]>
+Description:
+		Value representing the can_id of mailbox 0.
+
+		Default: 0x7ff (standard frame)
+
+		Due to a chip bug (errata 50.2.6.3 & 50.3.5.3 in
+		"AT91SAM9263 Preliminary 6249H-ATARM-27-Jul-09") the
+		contents of mailbox 0 may be send under certain
+		conditions (even if disabled or in rx mode).
+
+		The workaround in the errata suggests not to use the
+		mailbox and load it with an unused identifier.
+
+		In order to use an extended can_id add the
+		CAN_EFF_FLAG (0x80000000U) to the can_id. Example:
+
+		- standard id 0x7ff:
+		echo 0x7ff      > /sys/class/net/can0/mb0_id
+
+		- extended id 0x1fffffff:
+		echo 0x9fffffff > /sys/class/net/can0/mb0_id

Documentation/networking/bonding.txt

···
 3.3	Configuring Bonding Manually with Ifenslave
 3.3.1		Configuring Multiple Bonds Manually
 3.4	Configuring Bonding Manually via Sysfs
-3.5	Overriding Configuration for Special Cases
+3.5	Configuration with Interfaces Support
+3.6	Overriding Configuration for Special Cases
 
 4. Querying Bonding Configuration
 4.1	Bonding Configuration
···
 default kernel source include directory.
 
 SECOND IMPORTANT NOTE:
-	If you plan to configure bonding using sysfs, you do not need
-to use ifenslave.
+	If you plan to configure bonding using sysfs or using the
+/etc/network/interfaces file, you do not need to use ifenslave.
 
 2. Bonding Driver Options
 =========================
···
 
 	You can configure bonding using either your distro's network
 initialization scripts, or manually using either ifenslave or the
-sysfs interface.  Distros generally use one of two packages for the
-network initialization scripts: initscripts or sysconfig.  Recent
-versions of these packages have support for bonding, while older
+sysfs interface.  Distros generally use one of three packages for the
+network initialization scripts: initscripts, sysconfig or interfaces.
+Recent versions of these packages have support for bonding, while older
 versions do not.
 
 	We will first describe the options for configuring bonding for
-distros using versions of initscripts and sysconfig with full or
-partial support for bonding, then provide information on enabling
+distros using versions of initscripts, sysconfig and interfaces with full
+or partial support for bonding, then provide information on enabling
 bonding without support from the network initialization scripts (i.e.,
 older versions of initscripts or sysconfig).
 
-	If you're unsure whether your distro uses sysconfig or
-initscripts, or don't know if it's new enough, have no fear.
+	If you're unsure whether your distro uses sysconfig,
+initscripts or interfaces, or don't know if it's new enough, have no fear.
 Determining this is fairly straightforward.
 
-	First, issue the command:
+	First, look for a file called interfaces in /etc/network directory.
+If this file is present in your system, then your system use interfaces. See
+Configuration with Interfaces Support.
+
+	Else, issue the command:
 
 $ rpm -qf /sbin/ifup
 
···
 echo +eth2 > /sys/class/net/bond1/bonding/slaves
 echo +eth3 > /sys/class/net/bond1/bonding/slaves
 
-3.5 Overriding Configuration for Special Cases
+3.5 Configuration with Interfaces Support
+-----------------------------------------
+
+        This section applies to distros which use /etc/network/interfaces file
+to describe network interface configuration, most notably Debian and it's
+derivatives.
+
+	The ifup and ifdown commands on Debian don't support bonding out of
+the box. The ifenslave-2.6 package should be installed to provide bonding
+support.  Once installed, this package will provide bond-* options to be used
+into /etc/network/interfaces.
+
+	Note that ifenslave-2.6 package will load the bonding module and use
+the ifenslave command when appropriate.
+
+Example Configurations
+----------------------
+
+In /etc/network/interfaces, the following stanza will configure bond0, in
+active-backup mode, with eth0 and eth1 as slaves.
+
+auto bond0
+iface bond0 inet dhcp
+	bond-slaves eth0 eth1
+	bond-mode active-backup
+	bond-miimon 100
+	bond-primary eth0 eth1
+
+If the above configuration doesn't work, you might have a system using
+upstart for system startup. This is most notably true for recent
+Ubuntu versions. The following stanza in /etc/network/interfaces will
+produce the same result on those systems.
+
+auto bond0
+iface bond0 inet dhcp
+	bond-slaves none
+	bond-mode active-backup
+	bond-miimon 100
+
+auto eth0
+iface eth0 inet manual
+	bond-master bond0
+	bond-primary eth0 eth1
+
+auto eth1
+iface eth1 inet manual
+	bond-master bond0
+	bond-primary eth0 eth1
+
+For a full list of bond-* supported options in /etc/network/interfaces and some
+more advanced examples tailored to you particular distros, see the files in
+/usr/share/doc/ifenslave-2.6.
+
+3.6 Overriding Configuration for Special Cases
 ----------------------------------------------
+
 When using the bonding driver, the physical port which transmits a frame is
 typically selected by the bonding driver, and is not relevant to the user or
 system administrator.  The output port is simply selected using the policies of

MAINTAINERS

···
 F:	include/linux/wimax/i2400m.h
 
 INTEL WIRELESS WIFI LINK (iwlwifi)
-M:	Reinette Chatre <[e-mail]>
 M:	Wey-Yi Guy <[e-mail]>
 M:	Intel Linux Wireless <[e-mail]>
 L:	[e-mail]

drivers/atm/idt77105.c

···
 	spin_unlock_irqrestore(&idt77105_priv_lock, flags);
 	if (arg == NULL)
 		return 0;
-	return copy_to_user(arg, &PRIV(dev)->stats,
+	return copy_to_user(arg, &stats,
 		    sizeof(struct idt77105_stats)) ? -EFAULT : 0;
 }
 

drivers/bluetooth/ath3k.c

···
 #define USB_REQ_DFU_DNLOAD	1
 #define BULK_SIZE		4096
 
-struct ath3k_data {
-	struct usb_device *udev;
-	u8 *fw_data;
-	u32 fw_size;
-	u32 fw_sent;
-};
-
-static int ath3k_load_firmware(struct ath3k_data *data,
-				unsigned char *firmware,
-				int count)
+static int ath3k_load_firmware(struct usb_device *udev,
+				const struct firmware *firmware)
 {
 	u8 *send_buf;
 	int err, pipe, len, size, sent = 0;
+	int count = firmware->size;
 
-	BT_DBG("ath3k %p udev %p", data, data->udev);
+	BT_DBG("udev %p", udev);
 
-	pipe = usb_sndctrlpipe(data->udev, 0);
-
-	if ((usb_control_msg(data->udev, pipe,
-				USB_REQ_DFU_DNLOAD,
-				USB_TYPE_VENDOR, 0, 0,
-				firmware, 20, USB_CTRL_SET_TIMEOUT)) < 0) {
-		BT_ERR("Can't change to loading configuration err");
-		return -EBUSY;
-	}
-	sent += 20;
-	count -= 20;
+	pipe = usb_sndctrlpipe(udev, 0);
 
 	send_buf = kmalloc(BULK_SIZE, GFP_ATOMIC);
 	if (!send_buf) {
···
 		return -ENOMEM;
 	}
 
+	memcpy(send_buf, firmware->data, 20);
+	if ((err = usb_control_msg(udev, pipe,
+				USB_REQ_DFU_DNLOAD,
+				USB_TYPE_VENDOR, 0, 0,
+				send_buf, 20, USB_CTRL_SET_TIMEOUT)) < 0) {
+		BT_ERR("Can't change to loading configuration err");
+		goto error;
+	}
+	sent += 20;
+	count -= 20;
+
 	while (count) {
 		size = min_t(uint, count, BULK_SIZE);
-		pipe = usb_sndbulkpipe(data->udev, 0x02);
-		memcpy(send_buf, firmware + sent, size);
+		pipe = usb_sndbulkpipe(udev, 0x02);
+		memcpy(send_buf, firmware->data + sent, size);
 
-		err = usb_bulk_msg(data->udev, pipe, send_buf, size,
+		err = usb_bulk_msg(udev, pipe, send_buf, size,
 					&len, 3000);
 
 		if (err || (len != size)) {
···
 {
 	const struct firmware *firmware;
 	struct usb_device *udev = interface_to_usbdev(intf);
-	struct ath3k_data *data;
-	int size;
 
 	BT_DBG("intf %p id %p", intf, id);
 
 	if (intf->cur_altsetting->desc.bInterfaceNumber != 0)
 		return -ENODEV;
 
-	data = kzalloc(sizeof(*data), GFP_KERNEL);
-	if (!data)
-		return -ENOMEM;
-
-	data->udev = udev;
-
 	if (request_firmware(&firmware, "ath3k-1.fw", &udev->dev) < 0) {
-		kfree(data);
 		return -EIO;
 	}
 
-	size = max_t(uint, firmware->size, 4096);
-	data->fw_data = kmalloc(size, GFP_KERNEL);
-	if (!data->fw_data) {
+	if (ath3k_load_firmware(udev, firmware)) {
 		release_firmware(firmware);
-		kfree(data);
-		return -ENOMEM;
-	}
-
-	memcpy(data->fw_data, firmware->data, firmware->size);
-	data->fw_size = firmware->size;
-	data->fw_sent = 0;
-	release_firmware(firmware);
-
-	usb_set_intfdata(intf, data);
-	if (ath3k_load_firmware(data, data->fw_data, data->fw_size)) {
-		usb_set_intfdata(intf, NULL);
-		kfree(data->fw_data);
-		kfree(data);
 		return -EIO;
 	}
+	release_firmware(firmware);
 
 	return 0;
 }
 
 static void ath3k_disconnect(struct usb_interface *intf)
 {
-	struct ath3k_data *data = usb_get_intfdata(intf);
-
 	BT_DBG("ath3k_disconnect intf %p", intf);
-
-	kfree(data->fw_data);
-	kfree(data);
 }
 
 static struct usb_driver ath3k_driver = {

drivers/net/bnx2.c

···
 	    !(data & ETH_FLAG_RXVLAN))
 		return -EINVAL;
 
+	/* TSO with VLAN tag won't work with current firmware */
+	if (!(data & ETH_FLAG_TXVLAN))
+		return -EINVAL;
+
 	rc = ethtool_op_set_flags(dev, data, ETH_FLAG_RXHASH | ETH_FLAG_RXVLAN |
 				  ETH_FLAG_TXVLAN);
 	if (rc)
···
 
 		/* AER (Advanced Error Reporting) hooks */
 		err = pci_enable_pcie_error_reporting(pdev);
-		if (err) {
-			dev_err(&pdev->dev, "pci_enable_pcie_error_reporting "
-					    "failed 0x%x\n", err);
-			/* non-fatal, continue */
-		}
+		if (!err)
+			bp->flags |= BNX2_FLAG_AER_ENABLED;
 
 	} else {
 		bp->pcix_cap = pci_find_capability(pdev, PCI_CAP_ID_PCIX);
···
 	return 0;
 
 err_out_unmap:
-	if (bp->flags & BNX2_FLAG_PCIE)
+	if (bp->flags & BNX2_FLAG_AER_ENABLED) {
 		pci_disable_pcie_error_reporting(pdev);
+		bp->flags &= ~BNX2_FLAG_AER_ENABLED;
+	}
 
 	if (bp->regview) {
 		iounmap(bp->regview);
···
 
 	kfree(bp->temp_stats_blk);
 
-	if (bp->flags & BNX2_FLAG_PCIE)
+	if (bp->flags & BNX2_FLAG_AER_ENABLED) {
 		pci_disable_pcie_error_reporting(pdev);
+		bp->flags &= ~BNX2_FLAG_AER_ENABLED;
+	}
 
 	free_netdev(dev);
 
···
 	}
 	rtnl_unlock();
 
-	if (!(bp->flags & BNX2_FLAG_PCIE))
+	if (!(bp->flags & BNX2_FLAG_AER_ENABLED))
 		return result;
 
 	err = pci_cleanup_aer_uncorrect_error_status(pdev);

drivers/net/bnx2.h

···
 #define BNX2_FLAG_JUMBO_BROKEN		0x00000800
 #define BNX2_FLAG_CAN_KEEP_VLAN		0x00001000
 #define BNX2_FLAG_BROKEN_STATS		0x00002000
+#define BNX2_FLAG_AER_ENABLED		0x00004000
 
 	struct bnx2_napi	bnx2_napi[BNX2_MAX_MSIX_VEC];
 

drivers/net/bonding/bond_3ad.c

···
 	if (!(dev->flags & IFF_MASTER))
 		goto out;
 
+	skb = skb_share_check(skb, GFP_ATOMIC);
+	if (!skb)
+		goto out;
+
 	if (!pskb_may_pull(skb, sizeof(struct lacpdu)))
 		goto out;
 

drivers/net/bonding/bond_alb.c

···
 		goto out;
 	}
 
+	skb = skb_share_check(skb, GFP_ATOMIC);
+	if (!skb)
+		goto out;
+
 	if (!pskb_may_pull(skb, arp_hdr_len(bond_dev)))
 		goto out;
 

drivers/net/bonding/bond_main.c

···
 	if (!slave || !slave_do_arp_validate(bond, slave))
 		goto out_unlock;
 
+	skb = skb_share_check(skb, GFP_ATOMIC);
+	if (!skb)
+		goto out_unlock;
+
 	if (!pskb_may_pull(skb, arp_hdr_len(dev)))
 		goto out_unlock;
 

drivers/net/can/Kconfig

···
 
 source "drivers/net/can/usb/Kconfig"
 
+source "drivers/net/can/softing/Kconfig"
+
 config CAN_DEBUG_DEVICES
 	bool "CAN devices debugging messages"
 	depends on CAN

drivers/net/can/Makefile

···
 can-dev-y			:= dev.o
 
 obj-y				+= usb/
+obj-y				+= softing/
 
 obj-$(CONFIG_CAN_SJA1000)	+= sja1000/
 obj-$(CONFIG_CAN_MSCAN)		+= mscan/

drivers/net/can/at91_can.c

···
  * at91_can.c - CAN network driver for AT91 SoC CAN controller
  *
  * (C) 2007 by Hans J. Koch <[e-mail]>
- * (C) 2008, 2009, 2010 by Marc Kleine-Budde <[e-mail]>
+ * (C) 2008, 2009, 2010, 2011 by Marc Kleine-Budde <[e-mail]>
  *
  * This software may be distributed under the terms of the GNU General
  * Public License ("GPL") version 2 as distributed in the 'COPYING'
···
 #include <linux/module.h>
 #include <linux/netdevice.h>
 #include <linux/platform_device.h>
+#include <linux/rtnetlink.h>
 #include <linux/skbuff.h>
 #include <linux/spinlock.h>
 #include <linux/string.h>
···
 
 #include <mach/board.h>
 
-#define AT91_NAPI_WEIGHT	12
+#define AT91_NAPI_WEIGHT	11
 
 /*
  * RX/TX Mailbox split
  * don't dare to touch
  */
-#define AT91_MB_RX_NUM		12
+#define AT91_MB_RX_NUM		11
 #define AT91_MB_TX_SHIFT	2
 
-#define AT91_MB_RX_FIRST	0
+#define AT91_MB_RX_FIRST	1
 #define AT91_MB_RX_LAST		(AT91_MB_RX_FIRST + AT91_MB_RX_NUM - 1)
 
 #define AT91_MB_RX_MASK(i)	((1 << (i)) - 1)
 #define AT91_MB_RX_SPLIT	8
 #define AT91_MB_RX_LOW_LAST	(AT91_MB_RX_SPLIT - 1)
-#define AT91_MB_RX_LOW_MASK	(AT91_MB_RX_MASK(AT91_MB_RX_SPLIT))
+#define AT91_MB_RX_LOW_MASK	(AT91_MB_RX_MASK(AT91_MB_RX_SPLIT) & \
+				 ~AT91_MB_RX_MASK(AT91_MB_RX_FIRST))
 
 #define AT91_MB_TX_NUM		(1 << AT91_MB_TX_SHIFT)
 #define AT91_MB_TX_FIRST	(AT91_MB_RX_LAST + 1)
···
 
 	struct clk		*clk;
 	struct at91_can_data	*pdata;
+
+	canid_t			mb0_id;
 };
 
 static struct can_bittiming_const at91_bittiming_const = {
···
 	set_mb_mode_prio(priv, mb, mode, 0);
 }
 
+static inline u32 at91_can_id_to_reg_mid(canid_t can_id)
+{
+	u32 reg_mid;
+
+	if (can_id & CAN_EFF_FLAG)
+		reg_mid = (can_id & CAN_EFF_MASK) | AT91_MID_MIDE;
+	else
+		reg_mid = (can_id & CAN_SFF_MASK) << 18;
+
+	return reg_mid;
+}
+
 /*
  * Swtich transceiver on or off
  */
···
 {
 	struct at91_priv *priv = netdev_priv(dev);
 	unsigned int i;
+	u32 reg_mid;
 
 	/*
-	 * The first 12 mailboxes are used as a reception FIFO. The
-	 * last mailbox is configured with overwrite option. The
-	 * overwrite flag indicates a FIFO overflow.
+	 * Due to a chip bug (errata 50.2.6.3 & 50.3.5.3) the first
+	 * mailbox is disabled. The next 11 mailboxes are used as a
+	 * reception FIFO. The last mailbox is configured with
+	 * overwrite option. The overwrite flag indicates a FIFO
+	 * overflow.
 	 */
+	reg_mid = at91_can_id_to_reg_mid(priv->mb0_id);
+	for (i = 0; i < AT91_MB_RX_FIRST; i++) {
+		set_mb_mode(priv, i, AT91_MB_MODE_DISABLED);
+		at91_write(priv, AT91_MID(i), reg_mid);
+		at91_write(priv, AT91_MCR(i), 0x0);	/* clear dlc */
+	}
+
 	for (i = AT91_MB_RX_FIRST; i < AT91_MB_RX_LAST; i++)
 		set_mb_mode(priv, i, AT91_MB_MODE_RX);
 	set_mb_mode(priv, AT91_MB_RX_LAST, AT91_MB_MODE_RX_OVRWR);
···
 		set_mb_mode_prio(priv, i, AT91_MB_MODE_TX, 0);
 
 	/* Reset tx and rx helper pointers */
-	priv->tx_next = priv->tx_echo = priv->rx_next = 0;
+	priv->tx_next = priv->tx_echo = 0;
+	priv->rx_next = AT91_MB_RX_FIRST;
 }
 
 static int at91_set_bittiming(struct net_device *dev)
···
 		netdev_err(dev, "BUG! TX buffer full when queue awake!\n");
 		return NETDEV_TX_BUSY;
 	}
-
-	if (cf->can_id & CAN_EFF_FLAG)
-		reg_mid = (cf->can_id & CAN_EFF_MASK) | AT91_MID_MIDE;
-	else
-		reg_mid = (cf->can_id & CAN_SFF_MASK) << 18;
-
+	reg_mid = at91_can_id_to_reg_mid(cf->can_id);
 	reg_mcr = ((cf->can_id & CAN_RTR_FLAG) ? AT91_MCR_MRTR : 0) |
 		(cf->can_dlc << 16) | AT91_MCR_MTCR;
 
···
  *
  * Theory of Operation:
  *
- * 12 of the 16 mailboxes on the chip are reserved for RX. we split
- * them into 2 groups. The lower group holds 8 and upper 4 mailboxes.
+ * 11 of the 16 mailboxes on the chip are reserved for RX. we split
+ * them into 2 groups. The lower group holds 7 and upper 4 mailboxes.
  *
  * Like it or not, but the chip always saves a received CAN message
  * into the first free mailbox it finds (starting with the
  * lowest). This makes it very difficult to read the messages in the
  * right order from the chip. This is how we work around that problem:
  *
- * The first message goes into mb nr. 0 and issues an interrupt. All
+ * The first message goes into mb nr. 1 and issues an interrupt. All
  * rx ints are disabled in the interrupt handler and a napi poll is
  * scheduled. We read the mailbox, but do _not_ reenable the mb (to
  * receive another message).
  *
  *    lower mbxs      upper
- *   ______^______    __^__
- *  /             \  /     \
+ *     ____^______    __^__
+ *    /           \  /     \
  * +-+-+-+-+-+-+-+-++-+-+-+-+
- * |x|x|x|x|x|x|x|x|| | | | |
+ * | |x|x|x|x|x|x|x|| | | | |
  * +-+-+-+-+-+-+-+-++-+-+-+-+
  *  0 0 0 0 0 0  0 0 0 0 1 1  \ mail
  *  0 1 2 3 4 5  6 7 8 9 0 1  / box
+ *  ^
+ *  |
+ *   \
+ *     unused, due to chip bug
  *
  * The variable priv->rx_next points to the next mailbox to read a
  * message from. As long we're in the lower mailboxes we just read the
···
 			"order of incoming frames cannot be guaranteed\n");
 
  again:
-	for (mb = find_next_bit(addr, AT91_MB_RX_NUM, priv->rx_next);
-	     mb < AT91_MB_RX_NUM && quota > 0;
+	for (mb = find_next_bit(addr, AT91_MB_RX_LAST + 1, priv->rx_next);
+	     mb < AT91_MB_RX_LAST + 1 && quota > 0;
 	     reg_sr = at91_read(priv, AT91_SR),
-	     mb = find_next_bit(addr, AT91_MB_RX_NUM, ++priv->rx_next)) {
+	     mb = find_next_bit(addr, AT91_MB_RX_LAST + 1, ++priv->rx_next)) {
 		at91_read_msg(dev, mb);
 
 		/* reactivate mailboxes */
···
 
 	/* upper group completed, look again in lower */
 	if (priv->rx_next > AT91_MB_RX_LOW_LAST &&
-	    quota > 0 && mb >= AT91_MB_RX_NUM) {
-		priv->rx_next = 0;
+	    quota > 0 && mb > AT91_MB_RX_LAST) {
+		priv->rx_next = AT91_MB_RX_FIRST;
 		goto again;
 	}
 
···
 	.ndo_start_xmit	= at91_start_xmit,
 };
 
+static ssize_t at91_sysfs_show_mb0_id(struct device *dev,
+		struct device_attribute *attr, char *buf)
+{
+	struct at91_priv *priv = netdev_priv(to_net_dev(dev));
+
+	if (priv->mb0_id & CAN_EFF_FLAG)
+		return snprintf(buf, PAGE_SIZE, "0x%08x\n", priv->mb0_id);
+	else
+		return snprintf(buf, PAGE_SIZE, "0x%03x\n", priv->mb0_id);
+}
+
+static ssize_t at91_sysfs_set_mb0_id(struct device *dev,
+		struct device_attribute *attr, const char *buf, size_t count)
+{
+	struct net_device *ndev = to_net_dev(dev);
+	struct at91_priv *priv = netdev_priv(ndev);
+	unsigned long can_id;
+	ssize_t ret;
+	int err;
+
+	rtnl_lock();
+
+	if (ndev->flags & IFF_UP) {
+		ret = -EBUSY;
+		goto out;
+	}
+
+	err = strict_strtoul(buf, 0, &can_id);
+	if (err) {
+		ret = err;
+		goto out;
+	}
+
+	if (can_id & CAN_EFF_FLAG)
+		can_id &= CAN_EFF_MASK | CAN_EFF_FLAG;
+	else
+		can_id &= CAN_SFF_MASK;
+
+	priv->mb0_id = can_id;
+	ret = count;
+
+ out:
+	rtnl_unlock();
+	return ret;
+}
+
+static DEVICE_ATTR(mb0_id, S_IWUGO | S_IRUGO,
+	at91_sysfs_show_mb0_id, at91_sysfs_set_mb0_id);
+
+static struct attribute *at91_sysfs_attrs[] = {
+	&dev_attr_mb0_id.attr,
+	NULL,
+};
+
+static struct attribute_group at91_sysfs_attr_group = {
+	.attrs = at91_sysfs_attrs,
+};
+
 static int __devinit at91_can_probe(struct platform_device *pdev)
 {
 	struct net_device *dev;
···
 	dev->netdev_ops	= &at91_netdev_ops;
 	dev->irq = irq;
 	dev->flags |= IFF_ECHO;
+	dev->sysfs_groups[0] = &at91_sysfs_attr_group;
 
 	priv = netdev_priv(dev);
 	priv->can.clock.freq = clk_get_rate(clk);
···
 	priv->dev = dev;
 	priv->clk = clk;
 	priv->pdata = pdev->dev.platform_data;
+	priv->mb0_id = 0x7ff;
 
 	netif_napi_add(dev, &priv->napi, at91_poll, AT91_NAPI_WEIGHT);
 

drivers/net/can/softing/Kconfig

···
+config CAN_SOFTING
+	tristate "Softing Gmbh CAN generic support"
+	depends on CAN_DEV
+	---help---
+	  Support for CAN cards from Softing Gmbh & some cards
+	  from Vector Gmbh.
+	  Softing Gmbh CAN cards come with 1 or 2 physical busses.
+	  Those cards typically use Dual Port RAM to communicate
+	  with the host CPU. The interface is then identical for PCI
+	  and PCMCIA cards. This driver operates on a platform device,
+	  which has been created by softing_cs or softing_pci driver.
+	  Warning:
+	  The API of the card does not allow fine control per bus, but
+	  controls the 2 busses on the card together.
+	  As such, some actions (start/stop/busoff recovery) on 1 bus
+	  must bring down the other bus too temporarily.
+
+config CAN_SOFTING_CS
+	tristate "Softing Gmbh CAN pcmcia cards"
+	depends on PCMCIA
+	select CAN_SOFTING
+	---help---
+	  Support for PCMCIA cards from Softing Gmbh & some cards
+	  from Vector Gmbh.
+	  You need firmware for these, which you can get at
+	  http://developer.berlios.de/projects/socketcan/
+	  This version of the driver is written against
+	  firmware version 4.6 (softing-fw-4.6-binaries.tar.gz)
+	  In order to use the card as CAN device, you need the Softing generic
+	  support too.

drivers/net/can/softing/Makefile

···
+
+softing-y := softing_main.o softing_fw.o
+obj-$(CONFIG_CAN_SOFTING) += softing.o
+obj-$(CONFIG_CAN_SOFTING_CS) += softing_cs.o
+
+ccflags-$(CONFIG_CAN_DEBUG_DEVICES) := -DDEBUG

drivers/net/can/softing/softing.h

···
+/*
+ * softing common interfaces
+ *
+ * by Kurt Van Dijck, 2008-2010
+ */
+
+#include <linux/atomic.h>
+#include <linux/netdevice.h>
+#include <linux/ktime.h>
+#include <linux/mutex.h>
+#include <linux/spinlock.h>
+#include <linux/can.h>
+#include <linux/can/dev.h>
+
+#include "softing_platform.h"
+
+struct softing;
+
+struct softing_priv {
+	struct can_priv can; /* must be the first member! */
+	struct net_device *netdev;
+	struct softing *card;
+	struct {
+		int pending;
+		/* variables wich hold the circular buffer */
+		int echo_put;
+		int echo_get;
+	} tx;
+	struct can_bittiming_const btr_const;
+	int index;
+	uint8_t output;
+	uint16_t chip;
+};
+#define netdev2softing(netdev)	((struct softing_priv *)netdev_priv(netdev))
+
+struct softing {
+	const struct softing_platform_data *pdat;
+	struct platform_device *pdev;
+	struct net_device *net[2];
+	spinlock_t spin; /* protect this structure & DPRAM access */
+	ktime_t ts_ref;
+	ktime_t ts_overflow; /* timestamp overflow value, in ktime */
+
+	struct {
+		/* indication of firmware status */
+		int up;
+		/* protection of the 'up' variable */
+		struct mutex lock;
+	} fw;
+	struct {
+		int nr;
+		int requested;
+		int svc_count;
+		unsigned int dpram_position;
+	} irq;
+	struct {
+		int pending;
+		int last_bus;
+		/*
+		 * keep the bus that last tx'd a message,
+		 * in order to let every netdev queue resume
+		 */
+	} tx;
+	__iomem uint8_t *dpram;
+	unsigned long dpram_phys;
+	unsigned long dpram_size;
+	struct {
+		uint16_t fw_version, hw_version, license, serial;
+		uint16_t chip[2];
+		unsigned int freq; /* remote cpu's operating frequency */
+	} id;
+};
+
+extern int softing_default_output(struct net_device *netdev);
+
+extern ktime_t softing_raw2ktime(struct softing *card, u32 raw);
+
+extern int softing_chip_poweron(struct softing *card);
+
+extern int softing_bootloader_command(struct softing *card, int16_t cmd,
+		const char *msg);
+
+/* Load firmware after reset */
+extern int softing_load_fw(const char *file, struct softing *card,
+			__iomem uint8_t *virt, unsigned int size, int offset);
+
+/* Load final application firmware after bootloader */
+extern int softing_load_app_fw(const char *file, struct softing *card);
+
+/*
+ * enable or disable irq
+ * only called with fw.lock locked
+ */
+extern int softing_enable_irq(struct softing *card, int enable);
+
+/* start/stop 1 bus on card */
+extern int softing_startstop(struct net_device *netdev, int up);
+
+/* netif_rx() */
+extern int softing_netdev_rx(struct net_device *netdev,
+		const struct can_frame *msg, ktime_t ktime);
+
+/* SOFTING DPRAM mappings */
+#define DPRAM_RX		0x0000
+	#define DPRAM_RX_SIZE	32
+	#define DPRAM_RX_CNT	16
+#define DPRAM_RX_RD		0x0201	/* uint8_t */
+#define DPRAM_RX_WR		0x0205	/* uint8_t */
+#define DPRAM_RX_LOST		0x0207	/* uint8_t */
+
+#define DPRAM_FCT_PARAM		0x0300	/* int16_t [20] */
+#define DPRAM_FCT_RESULT	0x0328	/* int16_t */
+#define DPRAM_FCT_HOST		0x032b	/* uint16_t */
+
+#define DPRAM_INFO_BUSSTATE	0x0331	/* uint16_t */
+#define DPRAM_INFO_BUSSTATE2	0x0335	/* uint16_t */
+#define DPRAM_INFO_ERRSTATE	0x0339	/* uint16_t */
+#define DPRAM_INFO_ERRSTATE2	0x033d	/* uint16_t */
+#define DPRAM_RESET		0x0341	/* uint16_t */
+#define DPRAM_CLR_RECV_FIFO	0x0345	/* uint16_t */
+#define DPRAM_RESET_TIME	0x034d	/* uint16_t */
+#define DPRAM_TIME		0x0350	/* uint64_t */
+#define DPRAM_WR_START		0x0358	/* uint8_t */
+#define DPRAM_WR_END		0x0359	/* uint8_t */
+#define DPRAM_RESET_RX_FIFO	0x0361	/* uint16_t */
+#define DPRAM_RESET_TX_FIFO	0x0364	/* uint8_t */
+#define DPRAM_READ_FIFO_LEVEL	0x0365	/* uint8_t */
+#define DPRAM_RX_FIFO_LEVEL	0x0366	/* uint16_t */
+#define DPRAM_TX_FIFO_LEVEL	0x0366	/* uint16_t */
+
+#define DPRAM_TX		0x0400	/* uint16_t */
+	#define DPRAM_TX_SIZE	16
+	#define DPRAM_TX_CNT	32
+#define DPRAM_TX_RD		0x0601	/* uint8_t */
+#define DPRAM_TX_WR		0x0605	/* uint8_t */
+
+#define DPRAM_COMMAND		0x07e0	/* uint16_t */
+#define DPRAM_RECEIPT		0x07f0	/* uint16_t */
+#define DPRAM_IRQ_TOHOST	0x07fe	/* uint8_t */
+#define DPRAM_IRQ_TOCARD	0x07ff	/* uint8_t */
+
+#define DPRAM_V2_RESET		0x0e00	/* uint8_t */
+#define DPRAM_V2_IRQ_TOHOST	0x0e02	/* uint8_t */
+
+#define TXMAX	(DPRAM_TX_CNT - 1)
+
+/* DPRAM return codes */
+#define RES_NONE	0
+#define RES_OK		1
+#define RES_NOK		2
+#define RES_UNKNOWN	3
+/* DPRAM flags */
+#define CMD_TX		0x01
+#define CMD_ACK		0x02
+#define CMD_XTD		0x04
+#define CMD_RTR		0x08
+#define CMD_ERR		0x10
+#define CMD_BUS2	0x80
+
+/* returned fifo entry bus state masks */
+#define SF_MASK_BUSOFF		0x80
+#define SF_MASK_EPASSIVE	0x60
+
+/* bus states */
+#define STATE_BUSOFF	2
+#define STATE_EPASSIVE	1
+#define STATE_EACTIVE	0

drivers/net/can/softing/softing_cs.c

···
+/*
+ * Copyright (C) 2008-2010
+ *
+ * - Kurt Van Dijck, EIA Electronics
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the version 2 of the GNU General Public License
+ * as published by the Free Software Foundation
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+
+#include <pcmcia/cistpl.h>
+#include <pcmcia/ds.h>
+
+#include "softing_platform.h"
+
+static int softingcs_index;
+static spinlock_t softingcs_index_lock;
+
+static int softingcs_reset(struct platform_device *pdev, int v);
+static int softingcs_enable_irq(struct platform_device *pdev, int v);
+
+/*
+ * platform_data descriptions
+ */
+#define MHZ (1000*1000)
+static const struct softing_platform_data softingcs_platform_data[] = {
+{
+	.name = "CANcard",
+	.manf = 0x0168, .prod = 0x001,
+	.generation = 1,
+	.nbus = 2,
+	.freq = 16 * MHZ, .max_brp = 32, .max_sjw = 4,
+	.dpram_size = 0x0800,
+	.boot = {0x0000, 0x000000, fw_dir "bcard.bin",},
+	.load = {0x0120, 0x00f600, fw_dir "ldcard.bin",},
+	.app = {0x0010, 0x0d0000, fw_dir "cancard.bin",},
+	.reset = softingcs_reset,
+	.enable_irq = softingcs_enable_irq,
+}, {
+	.name = "CANcard-NEC",
+	.manf = 0x0168, .prod = 0x002,
+	.generation = 1,
+	.nbus = 2,
+	.freq = 16 * MHZ, .max_brp = 32, .max_sjw = 4,
+	.dpram_size = 0x0800,
+	.boot = {0x0000, 0x000000, fw_dir "bcard.bin",},
+	.load = {0x0120, 0x00f600, fw_dir "ldcard.bin",},
+	.app = {0x0010, 0x0d0000, fw_dir "cancard.bin",},
+	.reset = softingcs_reset,
+	.enable_irq = softingcs_enable_irq,
+}, {
+	.name = "CANcard-SJA",
+	.manf = 0x0168, .prod = 0x004,
+	.generation = 1,
+	.nbus = 2,
+	.freq = 20 * MHZ, .max_brp = 32, .max_sjw = 4,
+	.dpram_size = 0x0800,
+	.boot = {0x0000, 0x000000, fw_dir "bcard.bin",},
+	.load = {0x0120, 0x00f600, fw_dir "ldcard.bin",},
+	.app = {0x0010, 0x0d0000, fw_dir "cansja.bin",},
+	.reset = softingcs_reset,
+	.enable_irq = softingcs_enable_irq,
+}, {
+	.name = "CANcard-2",
+	.manf = 0x0168, .prod = 0x005,
+	.generation = 2,
+	.nbus = 2,
+	.freq = 24 * MHZ, .max_brp = 64, .max_sjw = 4,
+	.dpram_size = 0x1000,
+	.boot = {0x0000, 0x000000, fw_dir "bcard2.bin",},
+	.load = {0x0120, 0x00f600, fw_dir "ldcard2.bin",},
+	.app = {0x0010, 0x0d0000, fw_dir "cancrd2.bin",},
+	.reset = softingcs_reset,
+	.enable_irq = NULL,
+}, {
+	.name = "Vector-CANcard",
+	.manf = 0x0168, .prod = 0x081,
+	.generation = 1,
+	.nbus = 2,
+	.freq = 16 * MHZ, .max_brp = 64, .max_sjw = 4,
+	.dpram_size = 0x0800,
+	.boot = {0x0000, 0x000000, fw_dir "bcard.bin",},
+	.load = {0x0120, 0x00f600, fw_dir "ldcard.bin",},
+	.app = {0x0010, 0x0d0000, fw_dir "cancard.bin",},
+	.reset = softingcs_reset,
+	.enable_irq = softingcs_enable_irq,
+}, {
+	.name = "Vector-CANcard-SJA",
+	.manf = 0x0168, .prod = 0x084,
+	.generation = 1,
+	.nbus = 2,
+	.freq = 20 * MHZ, .max_brp = 32, .max_sjw = 4,
+	.dpram_size = 0x0800,
+	.boot = {0x0000, 0x000000, fw_dir "bcard.bin",},
+	.load = {0x0120, 0x00f600, fw_dir "ldcard.bin",},
+	.app = {0x0010, 0x0d0000, fw_dir "cansja.bin",},
+	.reset = softingcs_reset,
+	.enable_irq = softingcs_enable_irq,
+}, {
+	.name = "Vector-CANcard-2",
+	.manf = 0x0168, .prod = 0x085,
+	.generation = 2,
+	.nbus = 2,
+	.freq = 24 * MHZ, .max_brp = 64, .max_sjw = 4,
+	.dpram_size = 0x1000,
+	.boot = {0x0000, 0x000000, fw_dir "bcard2.bin",},
+	.load = {0x0120, 0x00f600, fw_dir "ldcard2.bin",},
+	.app = {0x0010, 0x0d0000, fw_dir "cancrd2.bin",},
+	.reset = softingcs_reset,
+	.enable_irq = NULL,
+}, {
+	.name = "EDICcard-NEC",
+	.manf = 0x0168, .prod = 0x102,
+	.generation = 1,
+	.nbus = 2,
+	.freq = 16 * MHZ, .max_brp = 64, .max_sjw = 4,
+	.dpram_size = 0x0800,
+	.boot = {0x0000, 0x000000, fw_dir "bcard.bin",},
+	.load = {0x0120, 0x00f600, fw_dir "ldcard.bin",},
+	.app = {0x0010, 0x0d0000, fw_dir "cancard.bin",},
+	.reset = softingcs_reset,
+	.enable_irq = softingcs_enable_irq,
+}, {
+	.name = "EDICcard-2",
+	.manf = 0x0168, .prod = 0x105,
+	.generation = 2,
+	.nbus = 2,
+	.freq = 24 * MHZ, .max_brp = 64, .max_sjw = 4,
+	.dpram_size = 0x1000,
+	.boot = {0x0000, 0x000000, fw_dir "bcard2.bin",},
+	.load = {0x0120, 0x00f600, fw_dir "ldcard2.bin",},
+	.app = {0x0010, 0x0d0000, fw_dir "cancrd2.bin",},
+	.reset = softingcs_reset,
+	.enable_irq = NULL,
+}, {
+	0, 0,
+},
+};
+
+MODULE_FIRMWARE(fw_dir "bcard.bin");
+MODULE_FIRMWARE(fw_dir "ldcard.bin");
+MODULE_FIRMWARE(fw_dir "cancard.bin");
+MODULE_FIRMWARE(fw_dir "cansja.bin");
+
+MODULE_FIRMWARE(fw_dir "bcard2.bin");
+MODULE_FIRMWARE(fw_dir "ldcard2.bin");
+MODULE_FIRMWARE(fw_dir "cancrd2.bin");
+
+static __devinit const struct softing_platform_data
+*softingcs_find_platform_data(unsigned int manf, unsigned int prod)
+{
+	const struct softing_platform_data *lp;
+
+	for (lp = softingcs_platform_data; lp->manf; ++lp) {
+		if ((lp->manf == manf) && (lp->prod == prod))
+			return lp;
+	}
+	return NULL;
+}
+
+/*
+ * platformdata callbacks
+ */
+static int softingcs_reset(struct platform_device *pdev, int v)
+{
+	struct pcmcia_device *pcmcia = to_pcmcia_dev(pdev->dev.parent);
+
+	dev_dbg(&pdev->dev, "pcmcia config [2] %02x\n", v ? 0 : 0x20);
+	return pcmcia_write_config_byte(pcmcia, 2, v ? 0 : 0x20);
+}
+
+static int softingcs_enable_irq(struct platform_device *pdev, int v)
+{
+	struct pcmcia_device *pcmcia = to_pcmcia_dev(pdev->dev.parent);
+
+	dev_dbg(&pdev->dev, "pcmcia config [0] %02x\n", v ? 0x60 : 0);
+	return pcmcia_write_config_byte(pcmcia, 0, v ? 0x60 : 0);
+}
+
+/*
+ * pcmcia check
+ */
+static __devinit int softingcs_probe_config(struct pcmcia_device *pcmcia,
+		void *priv_data)
+{
+	struct softing_platform_data *pdat = priv_data;
+	struct resource *pres;
+	int memspeed = 0;
+
+	WARN_ON(!pdat);
+	pres = pcmcia->resource[PCMCIA_IOMEM_0];
+	if (resource_size(pres) < 0x1000)
+		return -ERANGE;
+
+	pres->flags |= WIN_MEMORY_TYPE_CM | WIN_ENABLE;
+	if (pdat->generation < 2) {
+		pres->flags |= WIN_USE_WAIT | WIN_DATA_WIDTH_8;
+		memspeed = 3;
+	} else {
+		pres->flags |= WIN_DATA_WIDTH_16;
+	}
+	return pcmcia_request_window(pcmcia, pres, memspeed);
+}
+
+static __devexit void softingcs_remove(struct pcmcia_device *pcmcia)
+{
+	struct platform_device *pdev = pcmcia->priv;
+
+	/* free bits */
+	platform_device_unregister(pdev);
+	/* release pcmcia stuff */
+	pcmcia_disable_device(pcmcia);
+}
+
+/*
+ * platform_device wrapper
+ * pdev->resource has 2 entries: io & irq
+ */
+static void softingcs_pdev_release(struct device *dev)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	kfree(pdev);
+}
+
+static __devinit int softingcs_probe(struct pcmcia_device *pcmcia)
+{
+	int ret;
+	struct platform_device *pdev;
+	const struct softing_platform_data *pdat;
+	struct resource *pres;
+	struct dev {
+		struct platform_device pdev;
+		struct resource res[2];
+	} *dev;
+
+	/* find matching platform_data */
+	pdat = softingcs_find_platform_data(pcmcia->manf_id, pcmcia->card_id);
+	if (!pdat)
+		return -ENOTTY;
+
+	/* setup pcmcia device */
+	pcmcia->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_IOMEM |
+		CONF_AUTO_SET_VPP | CONF_AUTO_CHECK_VCC;
+	ret = pcmcia_loop_config(pcmcia, softingcs_probe_config, (void *)pdat);
+	if (ret)
+		goto pcmcia_failed;
+
+	ret = pcmcia_enable_device(pcmcia);
+	if (ret < 0)
+		goto pcmcia_failed;
+
+	pres = pcmcia->resource[PCMCIA_IOMEM_0];
+	if (!pres) {
+		ret = -EBADF;
+		goto pcmcia_bad;
+	}
+
+	/* create softing platform device */
+	dev = kzalloc(sizeof(*dev), GFP_KERNEL);
+	if (!dev) {
+		ret = -ENOMEM;
+		goto mem_failed;
+	}
+	dev->pdev.resource = dev->res;
+	dev->pdev.num_resources = ARRAY_SIZE(dev->res);
+	dev->pdev.dev.release = softingcs_pdev_release;
+
+	pdev = &dev->pdev;
+	pdev->dev.platform_data = (void *)pdat;
+	pdev->dev.parent = &pcmcia->dev;
+	pcmcia->priv = pdev;
+
+	/* platform device resources */
+	pdev->resource[0].flags = IORESOURCE_MEM;
+	pdev->resource[0].start = pres->start;
+	pdev->resource[0].end = pres->end;
+
+	pdev->resource[1].flags = IORESOURCE_IRQ;
+	pdev->resource[1].start = pcmcia->irq;
+	pdev->resource[1].end = pdev->resource[1].start;
+
+	/* platform device setup */
+	spin_lock(&softingcs_index_lock);
+	pdev->id = softingcs_index++;
+	spin_unlock(&softingcs_index_lock);
+	pdev->name = "softing";
+	dev_set_name(&pdev->dev, "softingcs.%i", pdev->id);
+	ret = platform_device_register(pdev);
+	if (ret < 0)
+		goto platform_failed;
+
+	dev_info(&pcmcia->dev, "created %s\n", dev_name(&pdev->dev));
+	return 0;
+
+platform_failed:
+	kfree(dev);
+mem_failed:
+pcmcia_bad:
+pcmcia_failed:
+	pcmcia_disable_device(pcmcia);
+	pcmcia->priv = NULL;
+	return ret ?: -ENODEV;
+}
+
+static /*const*/ struct pcmcia_device_id softingcs_ids[] = {
+	/* softing */
+	PCMCIA_DEVICE_MANF_CARD(0x0168, 0x0001),
+	PCMCIA_DEVICE_MANF_CARD(0x0168, 0x0002),
+	PCMCIA_DEVICE_MANF_CARD(0x0168, 0x0004),
+	PCMCIA_DEVICE_MANF_CARD(0x0168, 0x0005),
+	/* vector, manufacturer? */
+	PCMCIA_DEVICE_MANF_CARD(0x0168, 0x0081),
+	PCMCIA_DEVICE_MANF_CARD(0x0168, 0x0084),
+	PCMCIA_DEVICE_MANF_CARD(0x0168, 0x0085),
+	/* EDIC */
+	PCMCIA_DEVICE_MANF_CARD(0x0168, 0x0102),
+	PCMCIA_DEVICE_MANF_CARD(0x0168, 0x0105),
+	PCMCIA_DEVICE_NULL,
+};
+
+MODULE_DEVICE_TABLE(pcmcia, softingcs_ids);
+
+static struct pcmcia_driver softingcs_driver = {
+	.owner		= THIS_MODULE,
+	.name		= "softingcs",
+	.id_table	= softingcs_ids,
+	.probe		= softingcs_probe,
+	.remove		= __devexit_p(softingcs_remove),
+};
+
+static int __init softingcs_start(void)
+{
+	spin_lock_init(&softingcs_index_lock);
+	return pcmcia_register_driver(&softingcs_driver);
+}
+
+static void __exit softingcs_stop(void)
+{
+	pcmcia_unregister_driver(&softingcs_driver);
+}
+
+module_init(softingcs_start);
+module_exit(softingcs_stop);
+
+MODULE_DESCRIPTION("softing CANcard driver"
+		", links PCMCIA card to softing driver");
+MODULE_LICENSE("GPL v2");

drivers/net/can/softing/softing_fw.c

···
+/*
+ * Copyright (C) 2008-2010
+ *
+ * - Kurt Van Dijck, EIA Electronics
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the version 2 of the GNU General Public License
+ * as published by the Free Software Foundation
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <linux/firmware.h>
+#include <linux/sched.h>
+#include <asm/div64.h>
+
+#include "softing.h"
+
+/*
+ * low level DPRAM command.
+ * Make sure that card->dpram[DPRAM_FCT_HOST] is preset
+ */
+static int _softing_fct_cmd(struct softing *card, int16_t cmd, uint16_t vector,
+		const char *msg)
+{
+	int ret;
+	unsigned long stamp;
+
+	iowrite16(cmd, &card->dpram[DPRAM_FCT_PARAM]);
+	iowrite8(vector >> 8, &card->dpram[DPRAM_FCT_HOST + 1]);
+	iowrite8(vector, &card->dpram[DPRAM_FCT_HOST]);
+	/* be sure to flush this to the card */
+	wmb();
+	stamp = jiffies + 1 * HZ;
+	/* wait for card */
+	do {
+		/* DPRAM_FCT_HOST is _not_ aligned */
+		ret = ioread8(&card->dpram[DPRAM_FCT_HOST]) +
+			(ioread8(&card->dpram[DPRAM_FCT_HOST + 1]) << 8);
+		/* don't have any cached variables */
+		rmb();
+		if (ret == RES_OK)
+			/* read return-value now */
+			return ioread16(&card->dpram[DPRAM_FCT_RESULT]);
+
+		if ((ret != vector) || time_after(jiffies, stamp))
+			break;
+		/* process context => relax */
+		usleep_range(500, 10000);
+	} while (1);
+
+	ret = (ret == RES_NONE) ? -ETIMEDOUT : -ECANCELED;
+	dev_alert(&card->pdev->dev, "firmware %s failed (%i)\n", msg, ret);
+	return ret;
+}
+
+static int softing_fct_cmd(struct softing *card, int16_t cmd, const char *msg)
+{
+	int ret;
+
+	ret = _softing_fct_cmd(card, cmd, 0, msg);
+	if (ret > 0) {
+		dev_alert(&card->pdev->dev, "%s returned %u\n", msg, ret);
+		ret = -EIO;
+	}
+	return ret;
+}
+
+int softing_bootloader_command(struct softing *card, int16_t cmd,
+		const char *msg)
+{
+	int ret;
+	unsigned long stamp;
+
+	iowrite16(RES_NONE, &card->dpram[DPRAM_RECEIPT]);
+	iowrite16(cmd, &card->dpram[DPRAM_COMMAND]);
+	/* be sure to flush this to the card */
+	wmb();
+	stamp = jiffies + 3 * HZ;
+	/* wait for card */
+	do {
+		ret = ioread16(&card->dpram[DPRAM_RECEIPT]);
+		/* don't have any cached variables */
+		rmb();
+		if (ret == RES_OK)
+			return 0;
+		if (time_after(jiffies, stamp))
+			break;
+		/* process context => relax */
+		usleep_range(500, 10000);
+	} while (!signal_pending(current));
+
+	ret = (ret == RES_NONE) ? -ETIMEDOUT : -ECANCELED;
+	dev_alert(&card->pdev->dev, "bootloader %s failed (%i)\n", msg, ret);
+	return ret;
+}
+
+static int fw_parse(const uint8_t **pmem, uint16_t *ptype, uint32_t *paddr,
+		uint16_t *plen, const uint8_t **pdat)
+{
+	uint16_t checksum[2];
+	const uint8_t *mem;
+	const uint8_t *end;
+
+	/*
+	 * firmware records are a binary, unaligned stream composed of:
+	 * uint16_t type;
+	 * uint32_t addr;
+	 * uint16_t len;
+	 * uint8_t dat[len];
+	 * uint16_t checksum;
+	 * all values in little endian.
+	 * We could define a struct for this, with __attribute__((packed)),
+	 * but would that solve the alignment in _all_ cases (cfr. the
+	 * struct itself may be an odd address)?
+	 *
+	 * I chose to use leXX_to_cpup() since this solves both
+	 * endianness & alignment.
+	 */
+	mem = *pmem;
+	*ptype = le16_to_cpup((void *)&mem[0]);
+	*paddr = le32_to_cpup((void *)&mem[2]);
+	*plen = le16_to_cpup((void *)&mem[6]);
+	*pdat = &mem[8];
+	/* verify checksum */
+	end = &mem[8 + *plen];
+	checksum[0] = le16_to_cpup((void *)end);
+	for (checksum[1] = 0; mem < end; ++mem)
+		checksum[1] += *mem;
+	if (checksum[0] != checksum[1])
+		return -EINVAL;
+	/* increment */
+	*pmem += 10 + *plen;
+	return 0;
+}
+
+int softing_load_fw(const char *file, struct softing *card,
+		__iomem uint8_t *dpram, unsigned int size, int offset)
+{
+	const struct firmware *fw;
+	int ret;
+	const uint8_t *mem, *end, *dat;
+	uint16_t type, len;
+	uint32_t addr;
+	uint8_t *buf = NULL;
+	int buflen = 0;
+	int8_t type_end = 0;
+
+	ret = request_firmware(&fw, file, &card->pdev->dev);
+	if (ret < 0)
+		return ret;
+	dev_dbg(&card->pdev->dev, "%s, firmware(%s) got %u bytes"
+		", offset %c0x%04x\n",
+		card->pdat->name, file, (unsigned int)fw->size,
+		(offset >= 0) ? '+' : '-', (unsigned int)abs(offset));
+	/* parse the firmware */
+	mem = fw->data;
+	end = &mem[fw->size];
+	/* look for header record */
+	ret = fw_parse(&mem, &type, &addr, &len, &dat);
+	if (ret < 0)
+		goto failed;
+	if (type != 0xffff)
+		goto failed;
+	if (strncmp("Structured Binary Format, Softing GmbH" , dat, len)) {
+		ret = -EINVAL;
+		goto failed;
+	}
+	/* ok, we had a header */
+	while (mem < end) {
+		ret = fw_parse(&mem, &type, &addr, &len, &dat);
+		if (ret < 0)
+			goto failed;
+		if (type == 3) {
+			/* start address, not used here */
+			continue;
+		} else if (type == 1) {
+			/* eof */
+			type_end = 1;
+			break;
+		} else if (type != 0) {
+			ret = -EINVAL;
+			goto failed;
+		}
+
+		if ((addr + len + offset) > size)
+			goto failed;
+		memcpy_toio(&dpram[addr + offset], dat, len);
+		/* be sure to flush caches from IO space */
+		mb();
+		if (len > buflen) {
+			/* align buflen */
+			buflen = (len + (1024-1)) & ~(1024-1);
+			buf = krealloc(buf, buflen, GFP_KERNEL);
+			if (!buf) {
+				ret = -ENOMEM;
+				goto failed;
+			}
+		}
+		/* verify record data */
+		memcpy_fromio(buf, &dpram[addr + offset], len);
+		if (memcmp(buf, dat, len)) {
+			/* is not ok */
+			dev_alert(&card->pdev->dev, "DPRAM readback failed\n");
+			ret = -EIO;
+			goto failed;
+		}
+	}
+	if (!type_end)
+		/* no end record seen */
+		goto failed;
+	ret = 0;
+failed:
+	kfree(buf);
+	release_firmware(fw);
+	if (ret < 0)
+		dev_info(&card->pdev->dev, "firmware %s failed\n", file);
+	return ret;
+}
+
+int softing_load_app_fw(const char *file, struct softing *card)
+{
+	const struct firmware *fw;
+	const uint8_t *mem, *end, *dat;
+	int ret, j;
+	uint16_t type, len;
+	uint32_t addr, start_addr = 0;
+	unsigned int sum, rx_sum;
+	int8_t type_end = 0, type_entrypoint = 0;
+
+	ret = request_firmware(&fw, file, &card->pdev->dev);
+	if (ret) {
+		dev_alert(&card->pdev->dev, "request_firmware(%s) got %i\n",
+			file, ret);
+		return ret;
+	}
+	dev_dbg(&card->pdev->dev, "firmware(%s) got %lu bytes\n",
+		file, (unsigned long)fw->size);
+	/* parse the firmware */
+	mem = fw->data;
+	end = &mem[fw->size];
+	/* look for header record */
+	ret = fw_parse(&mem, &type, &addr, &len, &dat);
+	if (ret)
+		goto failed;
+	ret = -EINVAL;
+	if (type != 0xffff) {
+		dev_alert(&card->pdev->dev, "firmware starts with type 0x%x\n",
+			type);
+		goto failed;
+	}
+	if (strncmp("Structured Binary Format, Softing GmbH", dat, len)) {
+		dev_alert(&card->pdev->dev, "firmware string '%.*s' fault\n",
+				len, dat);
+		goto failed;
+	}
+	/* ok, we had a header */
+	while (mem < end) {
+		ret = fw_parse(&mem, &type, &addr, &len, &dat);
+		if (ret)
+			goto failed;
+
+		if (type == 3) {
+			/* start address */
+			start_addr = addr;
+			type_entrypoint = 1;
+			continue;
+		} else if (type == 1) {
+			/* eof */
+			type_end = 1;
+			break;
+		} else if (type != 0) {
+			dev_alert(&card->pdev->dev,
+					"unknown record type 0x%04x\n", type);
+			ret = -EINVAL;
+			goto failed;
+		}
+
+		/* regualar data */
+		for (sum = 0, j = 0; j < len; ++j)
+			sum += dat[j];
+		/* work in 16bit (target) */
+		sum &= 0xffff;
+
+		memcpy_toio(&card->dpram[card->pdat->app.offs], dat, len);
+		iowrite32(card->pdat->app.offs + card->pdat->app.addr,
+				&card->dpram[DPRAM_COMMAND + 2]);
+		iowrite32(addr, &card->dpram[DPRAM_COMMAND + 6]);
+		iowrite16(len, &card->dpram[DPRAM_COMMAND + 10]);
+		iowrite8(1, &card->dpram[DPRAM_COMMAND + 12]);
+		ret = softing_bootloader_command(card, 1, "loading app.");
+		if (ret < 0)
+			goto failed;
+		/* verify checksum */
+		rx_sum = ioread16(&card->dpram[DPRAM_RECEIPT + 2]);
+		if (rx_sum != sum) {
+			dev_alert(&card->pdev->dev, "SRAM seems to be damaged"
+				", wanted 0x%04x, got 0x%04x\n", sum, rx_sum);
+			ret = -EIO;
+			goto failed;
+		}
+	}
+	if (!type_end || !type_entrypoint)
+		goto failed;
+	/* start application in card */
+	iowrite32(start_addr, &card->dpram[DPRAM_COMMAND + 2]);
+	iowrite8(1, &card->dpram[DPRAM_COMMAND + 6]);
+	ret = softing_bootloader_command(card, 3, "start app.");
+	if (ret < 0)
+		goto failed;
+	ret = 0;
+failed:
+	release_firmware(fw);
+	if (ret < 0)
+		dev_info(&card->pdev->dev, "firmware %s failed\n", file);
+	return ret;
+}
+
+static int softing_reset_chip(struct softing *card)
+{
+	int ret;
+
+	do {
+		/* reset chip */
+		iowrite8(0, &card->dpram[DPRAM_RESET_RX_FIFO]);
+		iowrite8(0, &card->dpram[DPRAM_RESET_RX_FIFO+1]);
+		iowrite8(1, &card->dpram[DPRAM_RESET]);
+		iowrite8(0, &card->dpram[DPRAM_RESET+1]);
+
+		ret = softing_fct_cmd(card, 0, "reset_can");
+		if (!ret)
+			break;
+		if (signal_pending(current))
+			/* don't wait any longer */
+			break;
+	} while (1);
+	card->tx.pending = 0;
+	return ret;
+}
+
+int softing_chip_poweron(struct softing *card)
+{
+	int ret;
+	/* sync */
+	ret = _softing_fct_cmd(card, 99, 0x55, "sync-a");
+	if (ret < 0)
+		goto failed;
+
+	ret = _softing_fct_cmd(card, 99, 0xaa, "sync-b");
+	if (ret < 0)
+		goto failed;
+
+	ret = softing_reset_chip(card);
+	if (ret < 0)
+		goto failed;
+	/* get_serial */
+	ret = softing_fct_cmd(card, 43, "get_serial_number");
+	if (ret < 0)
+		goto failed;
+	card->id.serial = ioread32(&card->dpram[DPRAM_FCT_PARAM]);
+	/* get_version */
+	ret = softing_fct_cmd(card, 12, "get_version");
+	if (ret < 0)
+		goto failed;
+	card->id.fw_version = ioread16(&card->dpram[DPRAM_FCT_PARAM + 2]);
+	card->id.hw_version = ioread16(&card->dpram[DPRAM_FCT_PARAM + 4]);
+	card->id.license = ioread16(&card->dpram[DPRAM_FCT_PARAM + 6]);
+	card->id.chip[0] = ioread16(&card->dpram[DPRAM_FCT_PARAM + 8]);
+	card->id.chip[1] = ioread16(&card->dpram[DPRAM_FCT_PARAM + 10]);
+	return 0;
+failed:
+	return ret;
+}
+
+static void softing_initialize_timestamp(struct softing *card)
+{
+	uint64_t ovf;
+
+	card->ts_ref = ktime_get();
+
+	/* 16MHz is the reference */
+	ovf = 0x100000000ULL * 16;
+	do_div(ovf, card->pdat->freq ?: 16);
+
+	card->ts_overflow = ktime_add_us(ktime_set(0, 0), ovf);
+}
+
+ktime_t softing_raw2ktime(struct softing *card, u32 raw)
+{
+	uint64_t rawl;
+	ktime_t now, real_offset;
+	ktime_t target;
+	ktime_t tmp;
+
+	now = ktime_get();
+	real_offset = ktime_sub(ktime_get_real(), now);
+
+	/* find nsec from card */
+	rawl = raw * 16;
+	do_div(rawl, card->pdat->freq ?: 16);
+	target = ktime_add_us(card->ts_ref, rawl);
+	/* test for overflows */
+	tmp = ktime_add(target, card->ts_overflow);
+	while (unlikely(ktime_to_ns(tmp) > ktime_to_ns(now))) {
+		card->ts_ref = ktime_add(card->ts_ref, card->ts_overflow);
+		target = tmp;
+		tmp = ktime_add(target, card->ts_overflow);
+	}
+	return ktime_add(target, real_offset);
+}
+
+static inline int softing_error_reporting(struct net_device *netdev)
+{
+	struct softing_priv *priv = netdev_priv(netdev);
+
+	return (priv->can.ctrlmode & CAN_CTRLMODE_BERR_REPORTING)
+		? 1 : 0;
+}
+
+int softing_startstop(struct net_device *dev, int up)
+{
+	int ret;
+	struct softing *card;
+	struct softing_priv *priv;
+	struct net_device *netdev;
+	int bus_bitmask_start;
+	int j, error_reporting;
+	struct can_frame msg;
+	const struct can_bittiming *bt;
+
+	priv = netdev_priv(dev);
+	card = priv->card;
+
+	if (!card->fw.up)
+		return -EIO;
+
+	ret = mutex_lock_interruptible(&card->fw.lock);
+	if (ret)
+		return ret;
+
+	bus_bitmask_start = 0;
+	if (dev && up)
+		/* prepare to start this bus as well */
+		bus_bitmask_start |= (1 << priv->index);
+	/* bring netdevs down */
+	for (j = 0; j < ARRAY_SIZE(card->net); ++j) {
+		netdev = card->net[j];
+		if (!netdev)
+			continue;
+		priv = netdev_priv(netdev);
+
+		if (dev != netdev)
+			netif_stop_queue(netdev);
+
+		if (netif_running(netdev)) {
+			if (dev != netdev)
+				bus_bitmask_start |= (1 << j);
+			priv->tx.pending = 0;
+			priv->tx.echo_put = 0;
+			priv->tx.echo_get = 0;
+			/*
+			 * this bus' may just have called open_candev()
+			 * which is rather stupid to call close_candev()
+			 * already
+			 * but we may come here from busoff recovery too
+			 * in which case the echo_skb _needs_ flushing too.
+			 * just be sure to call open_candev() again
+			 */
+			close_candev(netdev);
+		}
+		priv->can.state = CAN_STATE_STOPPED;
+	}
+	card->tx.pending = 0;
+
+	softing_enable_irq(card, 0);
+	ret = softing_reset_chip(card);
+	if (ret)
+		goto failed;
+	if (!bus_bitmask_start)
+		/* no busses to be brought up */
+		goto card_done;
+
+	if ((bus_bitmask_start & 1) && (bus_bitmask_start & 2)
+			&& (softing_error_reporting(card->net[0])
+				!= softing_error_reporting(card->net[1]))) {
+		dev_alert(&card->pdev->dev,
+				"err_reporting flag differs for busses\n");
+		goto invalid;
+	}
+	error_reporting = 0;
+	if (bus_bitmask_start & 1) {
+		netdev = card->net[0];
+		priv = netdev_priv(netdev);
+		error_reporting += softing_error_reporting(netdev);
+		/* init chip 1 */
+		bt = &priv->can.bittiming;
+		iowrite16(bt->brp, &card->dpram[DPRAM_FCT_PARAM + 2]);
+		iowrite16(bt->sjw, &card->dpram[DPRAM_FCT_PARAM + 4]);
+		iowrite16(bt->phase_seg1 + bt->prop_seg,
+				&card->dpram[DPRAM_FCT_PARAM + 6]);
+		iowrite16(bt->phase_seg2, &card->dpram[DPRAM_FCT_PARAM + 8]);
+		iowrite16((priv->can.ctrlmode & CAN_CTRLMODE_3_SAMPLES) ? 1 : 0,
+				&card->dpram[DPRAM_FCT_PARAM + 10]);
+		ret = softing_fct_cmd(card, 1, "initialize_chip[0]");
+		if (ret < 0)
+			goto failed;
+		/* set mode */
+		iowrite16(0, &card->dpram[DPRAM_FCT_PARAM + 2]);
+		iowrite16(0, &card->dpram[DPRAM_FCT_PARAM + 4]);
+		ret = softing_fct_cmd(card, 3, "set_mode[0]");
+		if (ret < 0)
+			goto failed;
+		/* set filter */
+		/* 11bit id & mask */
+		iowrite16(0x0000, &card->dpram[DPRAM_FCT_PARAM + 2]);
+		iowrite16(0x07ff, &card->dpram[DPRAM_FCT_PARAM + 4]);
+		/* 29bit id.lo & mask.lo & id.hi & mask.hi */
+		iowrite16(0x0000, &card->dpram[DPRAM_FCT_PARAM + 6]);
+		iowrite16(0xffff, &card->dpram[DPRAM_FCT_PARAM + 8]);
+		iowrite16(0x0000, &card->dpram[DPRAM_FCT_PARAM + 10]);
+		iowrite16(0x1fff, &card->dpram[DPRAM_FCT_PARAM + 12]);
+		ret = softing_fct_cmd(card, 7, "set_filter[0]");
+		if (ret < 0)
+			goto failed;
+		/* set output control */
+		iowrite16(priv->output, &card->dpram[DPRAM_FCT_PARAM + 2]);
+		ret = softing_fct_cmd(card, 5, "set_output[0]");
+		if (ret < 0)
+			goto failed;
+	}
+	if (bus_bitmask_start & 2) {
+		netdev = card->net[1];
+		priv = netdev_priv(netdev);
+		error_reporting += softing_error_reporting(netdev);
+		/* init chip2 */
+		bt = &priv->can.bittiming;
+		iowrite16(bt->brp, &card->dpram[DPRAM_FCT_PARAM + 2]);
+		iowrite16(bt->sjw, &card->dpram[DPRAM_FCT_PARAM + 4]);
+		iowrite16(bt->phase_seg1 + bt->prop_seg,
+				&card->dpram[DPRAM_FCT_PARAM + 6]);
+		iowrite16(bt->phase_seg2, &card->dpram[DPRAM_FCT_PARAM + 8]);
+		iowrite16((priv->can.ctrlmode & CAN_CTRLMODE_3_SAMPLES) ? 1 : 0,
+				&card->dpram[DPRAM_FCT_PARAM + 10]);
+		ret = softing_fct_cmd(card, 2, "initialize_chip[1]");
+		if (ret < 0)
+			goto failed;
+		/* set mode2 */
+		iowrite16(0, &card->dpram[DPRAM_FCT_PARAM + 2]);
+		iowrite16(0, &card->dpram[DPRAM_FCT_PARAM + 4]);
+		ret = softing_fct_cmd(card, 4, "set_mode[1]");
+		if (ret < 0)
+			goto failed;
+		/* set filter2 */
+		/* 11bit id & mask */
+		iowrite16(0x0000, &card->dpram[DPRAM_FCT_PARAM + 2]);
+		iowrite16(0x07ff, &card->dpram[DPRAM_FCT_PARAM + 4]);
+		/* 29bit id.lo & mask.lo & id.hi & mask.hi */
+		iowrite16(0x0000, &card->dpram[DPRAM_FCT_PARAM + 6]);
+		iowrite16(0xffff, &card->dpram[DPRAM_FCT_PARAM + 8]);
+		iowrite16(0x0000, &card->dpram[DPRAM_FCT_PARAM + 10]);
+		iowrite16(0x1fff, &card->dpram[DPRAM_FCT_PARAM + 12]);
+		ret = softing_fct_cmd(card, 8, "set_filter[1]");
+		if (ret < 0)
+			goto failed;
+		/* set output control2 */
+		iowrite16(priv->output, &card->dpram[DPRAM_FCT_PARAM + 2]);
+		ret = softing_fct_cmd(card, 6, "set_output[1]");
+		if (ret < 0)
+			goto failed;
+	}
+	/* enable_error_frame */
+	/*
+	 * Error reporting is switched off at the moment since
+	 * the receiving of them is not yet 100% verified
+	 * This should be enabled sooner or later
+	 *
+	if (error_reporting) {
+		ret = softing_fct_cmd(card, 51, "enable_error_frame");
+		if (ret < 0)
+			goto failed;
+	}
+	*/
+	/* initialize interface */
+	iowrite16(1, &card->dpram[DPRAM_FCT_PARAM + 2]);
+	iowrite16(1, &card->dpram[DPRAM_FCT_PARAM + 4]);
+	iowrite16(1, &card->dpram[DPRAM_FCT_PARAM + 6]);
+	iowrite16(1, &card->dpram[DPRAM_FCT_PARAM + 8]);
+	iowrite16(1, &card->dpram[DPRAM_FCT_PARAM + 10]);
+	iowrite16(1, &card->dpram[DPRAM_FCT_PARAM + 12]);
+	iowrite16(1, &card->dpram[DPRAM_FCT_PARAM + 14]);
+	iowrite16(1, &card->dpram[DPRAM_FCT_PARAM + 16]);
+	iowrite16(1, &card->dpram[DPRAM_FCT_PARAM + 18]);
+	iowrite16(1, &card->dpram[DPRAM_FCT_PARAM + 20]);
+	ret = softing_fct_cmd(card, 17, "initialize_interface");
+	if (ret < 0)
+		goto failed;
+	/* enable_fifo */
+	ret = softing_fct_cmd(card, 36, "enable_fifo");
+	if (ret < 0)
+		goto failed;
+	/* enable fifo tx ack */
+	ret = softing_fct_cmd(card, 13, "fifo_tx_ack[0]");
+	if (ret < 0)
+		goto failed;
+	/* enable fifo tx ack2 */
+	ret = softing_fct_cmd(card, 14, "fifo_tx_ack[1]");
+	if (ret < 0)
+		goto failed;
+	/* start_chip */
+	ret = softing_fct_cmd(card, 11, "start_chip");
+	if (ret < 0)
+		goto failed;
+	iowrite8(0, &card->dpram[DPRAM_INFO_BUSSTATE]);
+	iowrite8(0, &card->dpram[DPRAM_INFO_BUSSTATE2]);
+	if (card->pdat->generation < 2) {
+		iowrite8(0, &card->dpram[DPRAM_V2_IRQ_TOHOST]);
+		/* flush the DPRAM caches */
+		wmb();
+	}
+
+	softing_initialize_timestamp(card);
+
+	/*
+	 * do socketcan notifications/status changes
+	 * from here, no errors should occur, or the failed: part
+	 * must be reviewed
+	 */
+	memset(&msg, 0, sizeof(msg));
+	msg.can_id = CAN_ERR_FLAG | CAN_ERR_RESTARTED;
+	msg.can_dlc = CAN_ERR_DLC;
+	for (j = 0; j < ARRAY_SIZE(card->net); ++j) {
+		if (!(bus_bitmask_start & (1 << j)))
+			continue;
+		netdev = card->net[j];
+		if (!netdev)
+			continue;
+		priv = netdev_priv(netdev);
+		priv->can.state = CAN_STATE_ERROR_ACTIVE;
+		open_candev(netdev);
+		if (dev != netdev) {
+			/* notify other busses on the restart */
+			softing_netdev_rx(netdev, &msg, ktime_set(0, 0));
+			++priv->can.can_stats.restarts;
+		}
+		netif_wake_queue(netdev);
+	}
+
+	/* enable interrupts */
+	ret = softing_enable_irq(card, 1);
+	if (ret)
+		goto failed;
+card_done:
+	mutex_unlock(&card->fw.lock);
+	return 0;
+invalid:
+	ret = -EINVAL;
+failed:
+	softing_enable_irq(card, 0);
+	softing_reset_chip(card);
+	mutex_unlock(&card->fw.lock);
+	/* bring all other interfaces down */
+	for (j = 0; j < ARRAY_SIZE(card->net); ++j) {
+		netdev = card->net[j];
+		if (!netdev)
+			continue;
+		dev_close(netdev);
+	}
+	return ret;
+}
+
+int softing_default_output(struct net_device *netdev)
+{
+	struct softing_priv *priv = netdev_priv(netdev);
+	struct softing *card = priv->card;
+
+	switch (priv->chip) {
+	case 1000:
+		return (card->pdat->generation < 2) ? 0xfb : 0xfa;
+	case 5:
+		return 0x60;
+	default:
+		return 0x40;
+	}
+}

drivers/net/can/softing/softing_main.c

···
+/*
+ * Copyright (C) 2008-2010
+ *
+ * - Kurt Van Dijck, EIA Electronics
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the version 2 of the GNU General Public License
+ * as published by the Free Software Foundation
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <linux/version.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+
+#include "softing.h"
+
+#define TX_ECHO_SKB_MAX (((TXMAX+1)/2)-1)
+
+/*
+ * test is a specific CAN netdev
+ * is online (ie. up 'n running, not sleeping, not busoff
+ */
+static inline int canif_is_active(struct net_device *netdev)
+{
+	struct can_priv *can = netdev_priv(netdev);
+
+	if (!netif_running(netdev))
+		return 0;
+	return (can->state <= CAN_STATE_ERROR_PASSIVE);
+}
+
+/* reset DPRAM */
+static inline void softing_set_reset_dpram(struct softing *card)
+{
+	if (card->pdat->generation >= 2) {
+		spin_lock_bh(&card->spin);
+		iowrite8(ioread8(&card->dpram[DPRAM_V2_RESET]) & ~1,
+				&card->dpram[DPRAM_V2_RESET]);
+		spin_unlock_bh(&card->spin);
+	}
+}
+
+static inline void softing_clr_reset_dpram(struct softing *card)
+{
+	if (card->pdat->generation >= 2) {
+		spin_lock_bh(&card->spin);
+		iowrite8(ioread8(&card->dpram[DPRAM_V2_RESET]) | 1,
+				&card->dpram[DPRAM_V2_RESET]);
+		spin_unlock_bh(&card->spin);
+	}
+}
+
+/* trigger the tx queue-ing */
+static netdev_tx_t softing_netdev_start_xmit(struct sk_buff *skb,
+		struct net_device *dev)
+{
+	struct softing_priv *priv = netdev_priv(dev);
+	struct softing *card = priv->card;
+	int ret;
+	uint8_t *ptr;
+	uint8_t fifo_wr, fifo_rd;
+	struct can_frame *cf = (struct can_frame *)skb->data;
+	uint8_t buf[DPRAM_TX_SIZE];
+
+	if (can_dropped_invalid_skb(dev, skb))
+		return NETDEV_TX_OK;
+
+	spin_lock(&card->spin);
+
+	ret = NETDEV_TX_BUSY;
+	if (!card->fw.up ||
+			(card->tx.pending >= TXMAX) ||
+			(priv->tx.pending >= TX_ECHO_SKB_MAX))
+		goto xmit_done;
+	fifo_wr = ioread8(&card->dpram[DPRAM_TX_WR]);
+	fifo_rd = ioread8(&card->dpram[DPRAM_TX_RD]);
+	if (fifo_wr == fifo_rd)
+		/* fifo full */
+		goto xmit_done;
+	memset(buf, 0, sizeof(buf));
+	ptr = buf;
+	*ptr = CMD_TX;
+	if (cf->can_id & CAN_RTR_FLAG)
+		*ptr |= CMD_RTR;
+	if (cf->can_id & CAN_EFF_FLAG)
+		*ptr |= CMD_XTD;
+	if (priv->index)
+		*ptr |= CMD_BUS2;
+	++ptr;
+	*ptr++ = cf->can_dlc;
+	*ptr++ = (cf->can_id >> 0);
+	*ptr++ = (cf->can_id >> 8);
+	if (cf->can_id & CAN_EFF_FLAG) {
+		*ptr++ = (cf->can_id >> 16);
+		*ptr++ = (cf->can_id >> 24);
+	} else {
+		/* increment 1, not 2 as you might think */
+		ptr += 1;
+	}
+	if (!(cf->can_id & CAN_RTR_FLAG))
+		memcpy(ptr, &cf->data[0], cf->can_dlc);
+	memcpy_toio(&card->dpram[DPRAM_TX + DPRAM_TX_SIZE * fifo_wr],
+			buf, DPRAM_TX_SIZE);
+	if (++fifo_wr >= DPRAM_TX_CNT)
+		fifo_wr = 0;
+	iowrite8(fifo_wr, &card->dpram[DPRAM_TX_WR]);
+	card->tx.last_bus = priv->index;
+	++card->tx.pending;
+	++priv->tx.pending;
+	can_put_echo_skb(skb, dev, priv->tx.echo_put);
+	++priv->tx.echo_put;
+	if (priv->tx.echo_put >= TX_ECHO_SKB_MAX)
+		priv->tx.echo_put = 0;
+	/* can_put_echo_skb() saves the skb, safe to return TX_OK */
+	ret = NETDEV_TX_OK;
+xmit_done:
+	spin_unlock(&card->spin);
+	if (card->tx.pending >= TXMAX) {
+		int j;
+		for (j = 0; j < ARRAY_SIZE(card->net); ++j) {
+			if (card->net[j])
+				netif_stop_queue(card->net[j]);
+		}
+	}
+	if (ret != NETDEV_TX_OK)
+		netif_stop_queue(dev);
+
+	return ret;
+}
+
+/*
+ * shortcut for skb delivery
+ */
+int softing_netdev_rx(struct net_device *netdev, const struct can_frame *msg,
+		ktime_t ktime)
+{
+	struct sk_buff *skb;
+	struct can_frame *cf;
+
+	skb = alloc_can_skb(netdev, &cf);
+	if (!skb)
+		return -ENOMEM;
+	memcpy(cf, msg, sizeof(*msg));
+	skb->tstamp = ktime;
+	return netif_rx(skb);
+}
+
+/*
+ * softing_handle_1
+ * pop 1 entry from the DPRAM queue, and process
+ */
+static int softing_handle_1(struct softing *card)
+{
+	struct net_device *netdev;
+	struct softing_priv *priv;
+	ktime_t ktime;
+	struct can_frame msg;
+	int cnt = 0, lost_msg;
+	uint8_t fifo_rd, fifo_wr, cmd;
+	uint8_t *ptr;
+	uint32_t tmp_u32;
+	uint8_t buf[DPRAM_RX_SIZE];
+
+	memset(&msg, 0, sizeof(msg));
+	/* test for lost msgs */
+	lost_msg = ioread8(&card->dpram[DPRAM_RX_LOST]);
+	if (lost_msg) {
+		int j;
+		/* reset condition */
+		iowrite8(0, &card->dpram[DPRAM_RX_LOST]);
+		/* prepare msg */
+		msg.can_id = CAN_ERR_FLAG | CAN_ERR_CRTL;
+		msg.can_dlc = CAN_ERR_DLC;
+		msg.data[1] = CAN_ERR_CRTL_RX_OVERFLOW;
+		/*
+		 * service to all busses, we don't know which it was applicable
+		 * but only service busses that are online
+		 */
+		for (j = 0; j < ARRAY_SIZE(card->net); ++j) {
+			netdev = card->net[j];
+			if (!netdev)
+				continue;
+			if (!canif_is_active(netdev))
+				/* a dead bus has no overflows */
+				continue;
+			++netdev->stats.rx_over_errors;
+			softing_netdev_rx(netdev, &msg, ktime_set(0, 0));
+		}
+		/* prepare for other use */
+		memset(&msg, 0, sizeof(msg));
+		++cnt;
+	}
+
+	fifo_rd = ioread8(&card->dpram[DPRAM_RX_RD]);
+	fifo_wr = ioread8(&card->dpram[DPRAM_RX_WR]);
+
+	if (++fifo_rd >= DPRAM_RX_CNT)
+		fifo_rd = 0;
+	if (fifo_wr == fifo_rd)
+		return cnt;
+
+	memcpy_fromio(buf, &card->dpram[DPRAM_RX + DPRAM_RX_SIZE*fifo_rd],
+			DPRAM_RX_SIZE);
+	mb();
+	/* trigger dual port RAM */
+	iowrite8(fifo_rd, &card->dpram[DPRAM_RX_RD]);
+
+	ptr = buf;
+	cmd = *ptr++;
+	if (cmd == 0xff)
+		/* not quite usefull, probably the card has got out */
+		return 0;
+	netdev = card->net[0];
+	if (cmd & CMD_BUS2)
+		netdev = card->net[1];
+	priv = netdev_priv(netdev);
+
+	if (cmd & CMD_ERR) {
+		uint8_t can_state, state;
+
+		state = *ptr++;
+
+		msg.can_id = CAN_ERR_FLAG;
+		msg.can_dlc = CAN_ERR_DLC;
+
+		if (state & SF_MASK_BUSOFF) {
+			can_state = CAN_STATE_BUS_OFF;
+			msg.can_id |= CAN_ERR_BUSOFF;
+			state = STATE_BUSOFF;
+		} else if (state & SF_MASK_EPASSIVE) {
+			can_state = CAN_STATE_ERROR_PASSIVE;
+			msg.can_id |= CAN_ERR_CRTL;
+			msg.data[1] = CAN_ERR_CRTL_TX_PASSIVE;
+			state = STATE_EPASSIVE;
+		} else {
+			can_state = CAN_STATE_ERROR_ACTIVE;
+			msg.can_id |= CAN_ERR_CRTL;
+			state = STATE_EACTIVE;
+		}
+		/* update DPRAM */
+		iowrite8(state, &card->dpram[priv->index ?
+				DPRAM_INFO_BUSSTATE2 : DPRAM_INFO_BUSSTATE]);
+		/* timestamp */
+		tmp_u32 = le32_to_cpup((void *)ptr);
+		ptr += 4;
+		ktime = softing_raw2ktime(card, tmp_u32);
+
+		++netdev->stats.rx_errors;
+		/* update internal status */
+		if (can_state != priv->can.state) {
+			priv->can.state = can_state;
+			if (can_state == CAN_STATE_ERROR_PASSIVE)
+				++priv->can.can_stats.error_passive;
+			else if (can_state == CAN_STATE_BUS_OFF) {
+				/* this calls can_close_cleanup() */
+				can_bus_off(netdev);
+				netif_stop_queue(netdev);
+			}
+			/* trigger socketcan */
+			softing_netdev_rx(netdev, &msg, ktime);
+		}
+
+	} else {
+		if (cmd & CMD_RTR)
+			msg.can_id |= CAN_RTR_FLAG;
+		msg.can_dlc = get_can_dlc(*ptr++);
+		if (cmd & CMD_XTD) {
+			msg.can_id |= CAN_EFF_FLAG;
+			msg.can_id |= le32_to_cpup((void *)ptr);
+			ptr += 4;
+		} else {
+			msg.can_id |= le16_to_cpup((void *)ptr);
+			ptr += 2;
+		}
+		/* timestamp */
+		tmp_u32 = le32_to_cpup((void *)ptr);
+		ptr += 4;
+		ktime = softing_raw2ktime(card, tmp_u32);
+		if (!(msg.can_id & CAN_RTR_FLAG))
+			memcpy(&msg.data[0], ptr, 8);
+		ptr += 8;
+		/* update socket */
+		if (cmd & CMD_ACK) {
+			/* acknowledge, was tx msg */
+			struct sk_buff *skb;
+			skb = priv->can.echo_skb[priv->tx.echo_get];
+			if (skb)
+				skb->tstamp = ktime;
+			can_get_echo_skb(netdev, priv->tx.echo_get);
+			++priv->tx.echo_get;
+			if (priv->tx.echo_get >= TX_ECHO_SKB_MAX)
+				priv->tx.echo_get = 0;
+			if (priv->tx.pending)
+				--priv->tx.pending;
+			if (card->tx.pending)
+				--card->tx.pending;
+			++netdev->stats.tx_packets;
+			if (!(msg.can_id & CAN_RTR_FLAG))
+				netdev->stats.tx_bytes += msg.can_dlc;
+		} else {
+			int ret;
+
+			ret = softing_netdev_rx(netdev, &msg, ktime);
+			if (ret == NET_RX_SUCCESS) {
+				++netdev->stats.rx_packets;
+				if (!(msg.can_id & CAN_RTR_FLAG))
+					netdev->stats.rx_bytes += msg.can_dlc;
+			} else {
+				++netdev->stats.rx_dropped;
+			}
+		}
+	}
+	++cnt;
+	return cnt;
+}
+
+/*
+ * real interrupt handler
+ */
+static irqreturn_t softing_irq_thread(int irq, void *dev_id)
+{
+	struct softing *card = (struct softing *)dev_id;
+	struct net_device *netdev;
+	struct softing_priv *priv;
+	int j, offset, work_done;
+
+	work_done = 0;
+	spin_lock_bh(&card->spin);
+	while (softing_handle_1(card) > 0) {
+		++card->irq.svc_count;
+		++work_done;
+	}
+	spin_unlock_bh(&card->spin);
+	/* resume tx queue's */
+	offset = card->tx.last_bus;
+	for (j = 0; j < ARRAY_SIZE(card->net); ++j) {
+		if (card->tx.pending >= TXMAX)
+			break;
+		netdev = card->net[(j + offset + 1) % card->pdat->nbus];
+		if (!netdev)
+			continue;
+		priv = netdev_priv(netdev);
+		if (!canif_is_active(netdev))
+			/* it makes no sense to wake dead busses */
+			continue;
+		if (priv->tx.pending >= TX_ECHO_SKB_MAX)
+			continue;
+		++work_done;
+		netif_wake_queue(netdev);
+	}
+	return work_done ? IRQ_HANDLED : IRQ_NONE;
+}
+
+/*
+ * interrupt routines:
+ * schedule the 'real interrupt handler'
+ */
+static irqreturn_t softing_irq_v2(int irq, void *dev_id)
+{
+	struct softing *card = (struct softing *)dev_id;
+	uint8_t ir;
+
+	ir = ioread8(&card->dpram[DPRAM_V2_IRQ_TOHOST]);
+	iowrite8(0, &card->dpram[DPRAM_V2_IRQ_TOHOST]);
+	return (1 == ir) ? IRQ_WAKE_THREAD : IRQ_NONE;
+}
+
+static irqreturn_t softing_irq_v1(int irq, void *dev_id)
+{
+	struct softing *card = (struct softing *)dev_id;
+	uint8_t ir;
+
+	ir = ioread8(&card->dpram[DPRAM_IRQ_TOHOST]);
+	iowrite8(0, &card->dpram[DPRAM_IRQ_TOHOST]);
+	return ir ? IRQ_WAKE_THREAD : IRQ_NONE;
+}
+
+/*
+ * netdev/candev inter-operability
+ */
+static int softing_netdev_open(struct net_device *ndev)
+{
+	int ret;
+
+	/* check or determine and set bittime */
+	ret = open_candev(ndev);
+	if (!ret)
+		ret = softing_startstop(ndev, 1);
+	return ret;
+}
+
+static int softing_netdev_stop(struct net_device *ndev)
+{
+	int ret;
+
+	netif_stop_queue(ndev);
+
+	/* softing cycle does close_candev() */
+	ret = softing_startstop(ndev, 0);
+	return ret;
+}
+
+static int softing_candev_set_mode(struct net_device *ndev, enum can_mode mode)
+{
+	int ret;
+
+	switch (mode) {
+	case CAN_MODE_START:
+		/* softing_startstop does close_candev() */
+		ret = softing_startstop(ndev, 1);
+		return ret;
+	case CAN_MODE_STOP:
+	case CAN_MODE_SLEEP:
+		return -EOPNOTSUPP;
+	}
+	return 0;
+}
+
+/*
+ * Softing device management helpers
+ */
+int softing_enable_irq(struct softing *card, int enable)
+{
+	int ret;
+
+	if (!card->irq.nr) {
+		return 0;
+	} else if (card->irq.requested && !enable) {
+		free_irq(card->irq.nr, card);
+		card->irq.requested = 0;
+	} else if (!card->irq.requested && enable) {
+		ret = request_threaded_irq(card->irq.nr,
+				(card->pdat->generation >= 2) ?
+					softing_irq_v2 : softing_irq_v1,
+				softing_irq_thread, IRQF_SHARED,
+				dev_name(&card->pdev->dev), card);
+		if (ret) {
+			dev_alert(&card->pdev->dev,
+					"request_threaded_irq(%u) failed\n",
+					card->irq.nr);
+			return ret;
+		}
+		card->irq.requested = 1;
+	}
+	return 0;
+}
+
+static void softing_card_shutdown(struct softing *card)
+{
+	int fw_up = 0;
+
+	if (mutex_lock_interruptible(&card->fw.lock))
+		/* return -ERESTARTSYS */;
+	fw_up = card->fw.up;
+	card->fw.up = 0;
+
+	if (card->irq.requested && card->irq.nr) {
+		free_irq(card->irq.nr, card);
+		card->irq.requested = 0;
+	}
+	if (fw_up) {
+		if (card->pdat->enable_irq)
+			card->pdat->enable_irq(card->pdev, 0);
+		softing_set_reset_dpram(card);
+		if (card->pdat->reset)
+			card->pdat->reset(card->pdev, 1);
+	}
+	mutex_unlock(&card->fw.lock);
+}
+
+static __devinit int softing_card_boot(struct softing *card)
+{
+	int ret, j;
+	static const uint8_t stream[] = {
+		0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, };
+	unsigned char back[sizeof(stream)];
+
+	if (mutex_lock_interruptible(&card->fw.lock))
+		return -ERESTARTSYS;
+	if (card->fw.up) {
+		mutex_unlock(&card->fw.lock);
+		return 0;
+	}
+	/* reset board */
+	if (card->pdat->enable_irq)
+		card->pdat->enable_irq(card->pdev, 1);
+	/* boot card */
+	softing_set_reset_dpram(card);
+	if (card->pdat->reset)
+		card->pdat->reset(card->pdev, 1);
+	for (j = 0; (j + sizeof(stream)) < card->dpram_size;
+			j += sizeof(stream)) {
+
+		memcpy_toio(&card->dpram[j], stream, sizeof(stream));
+		/* flush IO cache */
+		mb();
+		memcpy_fromio(back, &card->dpram[j], sizeof(stream));
+
+		if (!memcmp(back, stream, sizeof(stream)))
+			continue;
+		/* memory is not equal */
+		dev_alert(&card->pdev->dev, "dpram failed at 0x%04x\n", j);
+		ret = -EIO;
+		goto failed;
+	}
+	wmb();
+	/* load boot firmware */
+	ret = softing_load_fw(card->pdat->boot.fw, card, card->dpram,
+				card->dpram_size,
+				card->pdat->boot.offs - card->pdat->boot.addr);
+	if (ret < 0)
+		goto failed;
+	/* load loader firmware */
+	ret = softing_load_fw(card->pdat->load.fw, card, card->dpram,
+				card->dpram_size,
+				card->pdat->load.offs - card->pdat->load.addr);
+	if (ret < 0)
+		goto failed;
+
+	if (card->pdat->reset)
+		card->pdat->reset(card->pdev, 0);
+	softing_clr_reset_dpram(card);
+	ret = softing_bootloader_command(card, 0, "card boot");
+	if (ret < 0)
+		goto failed;
+	ret = softing_load_app_fw(card->pdat->app.fw, card);
+	if (ret < 0)
+		goto failed;
+
+	ret = softing_chip_poweron(card);
+	if (ret < 0)
+		goto failed;
+
+	card->fw.up = 1;
+	mutex_unlock(&card->fw.lock);
+	return 0;
+failed:
+	card->fw.up = 0;
+	if (card->pdat->enable_irq)
+		card->pdat->enable_irq(card->pdev, 0);
+	softing_set_reset_dpram(card);
+	if (card->pdat->reset)
+		card->pdat->reset(card->pdev, 1);
+	mutex_unlock(&card->fw.lock);
+	return ret;
+}
+
+/*
+ * netdev sysfs
+ */
+static ssize_t show_channel(struct device *dev, struct device_attribute *attr,
+		char *buf)
+{
+	struct net_device *ndev = to_net_dev(dev);
+	struct softing_priv *priv = netdev2softing(ndev);
+
+	return sprintf(buf, "%i\n", priv->index);
+}
+
+static ssize_t show_chip(struct device *dev, struct device_attribute *attr,
+		char *buf)
+{
+	struct net_device *ndev = to_net_dev(dev);
+	struct softing_priv *priv = netdev2softing(ndev);
+
+	return sprintf(buf, "%i\n", priv->chip);
+}
+
+static ssize_t show_output(struct device *dev, struct device_attribute *attr,
+		char *buf)
+{
+	struct net_device *ndev = to_net_dev(dev);
+	struct softing_priv *priv = netdev2softing(ndev);
+
+	return sprintf(buf, "0x%02x\n", priv->output);
+}
+
+static ssize_t store_output(struct device *dev, struct device_attribute *attr,
+		const char *buf, size_t count)
+{
+	struct net_device *ndev = to_net_dev(dev);
+	struct softing_priv *priv = netdev2softing(ndev);
+	struct softing *card = priv->card;
+	unsigned long val;
+	int ret;
+
+	ret = strict_strtoul(buf, 0, &val);
+	if (ret < 0)
+		return ret;
+	val &= 0xFF;
+
+	ret = mutex_lock_interruptible(&card->fw.lock);
+	if (ret)
+		return -ERESTARTSYS;
+	if (netif_running(ndev)) {
+		mutex_unlock(&card->fw.lock);
+		return -EBUSY;
+	}
+	priv->output = val;
+	mutex_unlock(&card->fw.lock);
+	return count;
+}
+
+static const DEVICE_ATTR(channel, S_IRUGO, show_channel, NULL);
+static const DEVICE_ATTR(chip, S_IRUGO, show_chip, NULL);
+static const DEVICE_ATTR(output, S_IRUGO | S_IWUSR, show_output, store_output);
+
+static const struct attribute *const netdev_sysfs_attrs[] = {
+	&dev_attr_channel.attr,
+	&dev_attr_chip.attr,
+	&dev_attr_output.attr,
+	NULL,
+};
+static const struct attribute_group netdev_sysfs_group = {
+	.name = NULL,
+	.attrs = (struct attribute **)netdev_sysfs_attrs,
+};
+
+static const struct net_device_ops softing_netdev_ops = {
+	.ndo_open = softing_netdev_open,
+	.ndo_stop = softing_netdev_stop,
+	.ndo_start_xmit	= softing_netdev_start_xmit,
+};
+
+static const struct can_bittiming_const softing_btr_const = {
+	.tseg1_min = 1,
+	.tseg1_max = 16,
+	.tseg2_min = 1,
+	.tseg2_max = 8,
+	.sjw_max = 4, /* overruled */
+	.brp_min = 1,
+	.brp_max = 32, /* overruled */
+	.brp_inc = 1,
+};
+
+
+static __devinit struct net_device *softing_netdev_create(struct softing *card,
+		uint16_t chip_id)
+{
+	struct net_device *netdev;
+	struct softing_priv *priv;
+
+	netdev = alloc_candev(sizeof(*priv), TX_ECHO_SKB_MAX);
+	if (!netdev) {
+		dev_alert(&card->pdev->dev, "alloc_candev failed\n");
+		return NULL;
+	}
+	priv = netdev_priv(netdev);
+	priv->netdev = netdev;
+	priv->card = card;
+	memcpy(&priv->btr_const, &softing_btr_const, sizeof(priv->btr_const));
+	priv->btr_const.brp_max = card->pdat->max_brp;
+	priv->btr_const.sjw_max = card->pdat->max_sjw;
+	priv->can.bittiming_const = &priv->btr_const;
+	priv->can.clock.freq = 8000000;
+	priv->chip = chip_id;
+	priv->output = softing_default_output(netdev);
+	SET_NETDEV_DEV(netdev, &card->pdev->dev);
+
+	netdev->flags |= IFF_ECHO;
+	netdev->netdev_ops = &softing_netdev_ops;
+	priv->can.do_set_mode = softing_candev_set_mode;
+	priv->can.ctrlmode_supported = CAN_CTRLMODE_3_SAMPLES;
+
+	return netdev;
+}
+
+static __devinit int softing_netdev_register(struct net_device *netdev)
+{
+	int ret;
+
+	netdev->sysfs_groups[0] = &netdev_sysfs_group;
+	ret = register_candev(netdev);
+	if (ret) {
+		dev_alert(&netdev->dev, "register failed\n");
+		return ret;
+	}
+	return 0;
+}
+
+static void softing_netdev_cleanup(struct net_device *netdev)
+{
+	unregister_candev(netdev);
+	free_candev(netdev);
+}
+
+/*
+ * sysfs for Platform device
+ */
+#define DEV_ATTR_RO(name, member) \
+static ssize_t show_##name(struct device *dev, \
+		struct device_attribute *attr, char *buf) \
+{ \
+	struct softing *card = platform_get_drvdata(to_platform_device(dev)); \
+	return sprintf(buf, "%u\n", card->member); \
+} \
+static DEVICE_ATTR(name, 0444, show_##name, NULL)
+
+#define DEV_ATTR_RO_STR(name, member) \
+static ssize_t show_##name(struct device *dev, \
+		struct device_attribute *attr, char *buf) \
+{ \
+	struct softing *card = platform_get_drvdata(to_platform_device(dev)); \
+	return sprintf(buf, "%s\n", card->member); \
+} \
+static DEVICE_ATTR(name, 0444, show_##name, NULL)
+
+DEV_ATTR_RO(serial, id.serial);
+DEV_ATTR_RO_STR(firmware, pdat->app.fw);
+DEV_ATTR_RO(firmware_version, id.fw_version);
+DEV_ATTR_RO_STR(hardware, pdat->name);
+DEV_ATTR_RO(hardware_version, id.hw_version);
+DEV_ATTR_RO(license, id.license);
+DEV_ATTR_RO(frequency, id.freq);
+DEV_ATTR_RO(txpending, tx.pending);
+
+static struct attribute *softing_pdev_attrs[] = {
+	&dev_attr_serial.attr,
+	&dev_attr_firmware.attr,
+	&dev_attr_firmware_version.attr,
+	&dev_attr_hardware.attr,
+	&dev_attr_hardware_version.attr,
+	&dev_attr_license.attr,
+	&dev_attr_frequency.attr,
+	&dev_attr_txpending.attr,
+	NULL,
+};
+
+static const struct attribute_group softing_pdev_group = {
+	.name = NULL,
+	.attrs = softing_pdev_attrs,
+};
+
+/*
+ * platform driver
+ */
+static __devexit int softing_pdev_remove(struct platform_device *pdev)
+{
+	struct softing *card = platform_get_drvdata(pdev);
+	int j;
+
+	/* first, disable card*/
+	softing_card_shutdown(card);
+
+	for (j = 0; j < ARRAY_SIZE(card->net); ++j) {
+		if (!card->net[j])
+			continue;
+		softing_netdev_cleanup(card->net[j]);
+		card->net[j] = NULL;
+	}
+	sysfs_remove_group(&pdev->dev.kobj, &softing_pdev_group);
+
+	iounmap(card->dpram);
+	kfree(card);
+	return 0;
+}
+
+static __devinit int softing_pdev_probe(struct platform_device *pdev)
+{
+	const struct softing_platform_data *pdat = pdev->dev.platform_data;
+	struct softing *card;
+	struct net_device *netdev;
+	struct softing_priv *priv;
+	struct resource *pres;
+	int ret;
+	int j;
+
+	if (!pdat) {
+		dev_warn(&pdev->dev, "no platform data\n");
+		return -EINVAL;
+	}
+	if (pdat->nbus > ARRAY_SIZE(card->net)) {
+		dev_warn(&pdev->dev, "%u nets??\n", pdat->nbus);
+		return -EINVAL;
+	}
+
+	card = kzalloc(sizeof(*card), GFP_KERNEL);
+	if (!card)
+		return -ENOMEM;
+	card->pdat = pdat;
+	card->pdev = pdev;
+	platform_set_drvdata(pdev, card);
+	mutex_init(&card->fw.lock);
+	spin_lock_init(&card->spin);
+
+	ret = -EINVAL;
+	pres = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!pres)
+		goto platform_resource_failed;;
+	card->dpram_phys = pres->start;
+	card->dpram_size = pres->end - pres->start + 1;
+	card->dpram = ioremap_nocache(card->dpram_phys, card->dpram_size);
+	if (!card->dpram) {
+		dev_alert(&card->pdev->dev, "dpram ioremap failed\n");
+		goto ioremap_failed;
+	}
+
+	pres = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+	if (pres)
+		card->irq.nr = pres->start;
+
+	/* reset card */
+	ret = softing_card_boot(card);
+	if (ret < 0) {
+		dev_alert(&pdev->dev, "failed to boot\n");
+		goto boot_failed;
+	}
+
+	/* only now, the chip's are known */
+	card->id.freq = card->pdat->freq;
+
+	ret = sysfs_create_group(&pdev->dev.kobj, &softing_pdev_group);
+	if (ret < 0) {
+		dev_alert(&card->pdev->dev, "sysfs failed\n");
+		goto sysfs_failed;
+	}
+
+	ret = -ENOMEM;
+	for (j = 0; j < ARRAY_SIZE(card->net); ++j) {
+		card->net[j] = netdev =
+			softing_netdev_create(card, card->id.chip[j]);
+		if (!netdev) {
+			dev_alert(&pdev->dev, "failed to make can[%i]", j);
+			goto netdev_failed;
+		}
+		priv = netdev_priv(card->net[j]);
+		priv->index = j;
+		ret = softing_netdev_register(netdev);
+		if (ret) {
+			free_candev(netdev);
+			card->net[j] = NULL;
+			dev_alert(&card->pdev->dev,
+					"failed to register can[%i]\n", j);
+			goto netdev_failed;
+		}
+	}
+	dev_info(&card->pdev->dev, "%s ready.\n", card->pdat->name);
+	return 0;
+
+netdev_failed:
+	for (j = 0; j < ARRAY_SIZE(card->net); ++j) {
+		if (!card->net[j])
+			continue;
+		softing_netdev_cleanup(card->net[j]);
+	}
+	sysfs_remove_group(&pdev->dev.kobj, &softing_pdev_group);
+sysfs_failed:
+	softing_card_shutdown(card);
+boot_failed:
+	iounmap(card->dpram);
+ioremap_failed:
+platform_resource_failed:
+	kfree(card);
+	return ret;
+}
+
+static struct platform_driver softing_driver = {
+	.driver = {
+		.name = "softing",
+		.owner = THIS_MODULE,
+	},
+	.probe = softing_pdev_probe,
+	.remove = __devexit_p(softing_pdev_remove),
+};
+
+MODULE_ALIAS("platform:softing");
+
+static int __init softing_start(void)
+{
+	return platform_driver_register(&softing_driver);
+}
+
+static void __exit softing_stop(void)
+{
+	platform_driver_unregister(&softing_driver);
+}
+
+module_init(softing_start);
+module_exit(softing_stop);
+
+MODULE_DESCRIPTION("Softing DPRAM CAN driver");
+MODULE_AUTHOR("Kurt Van Dijck <[e-mail]>");
+MODULE_LICENSE("GPL v2");

drivers/net/can/softing/softing_platform.h

···
+
+#include <linux/platform_device.h>
+
+#ifndef _SOFTING_DEVICE_H_
+#define _SOFTING_DEVICE_H_
+
+/* softing firmware directory prefix */
+#define fw_dir "softing-4.6/"
+
+struct softing_platform_data {
+	unsigned int manf;
+	unsigned int prod;
+	/*
+	 * generation
+	 * 1st with NEC or SJA1000
+	 * 8bit, exclusive interrupt, ...
+	 * 2nd only SJA1000
+	 * 16bit, shared interrupt
+	 */
+	int generation;
+	int nbus; /* # busses on device */
+	unsigned int freq; /* operating frequency in Hz */
+	unsigned int max_brp;
+	unsigned int max_sjw;
+	unsigned long dpram_size;
+	const char *name;
+	struct {
+		unsigned long offs;
+		unsigned long addr;
+		const char *fw;
+	} boot, load, app;
+	/*
+	 * reset() function
+	 * bring pdev in or out of reset, depending on value
+	 */
+	int (*reset)(struct platform_device *pdev, int value);
+	int (*enable_irq)(struct platform_device *pdev, int value);
+};
+
+#endif

drivers/net/cnic.c

···
 static void cnic_setup_page_tbl(struct cnic_dev *dev, struct cnic_dma *dma)
 {
 	int i;
-	u32 *page_table = dma->pgtbl;
+	__le32 *page_table = (__le32 *) dma->pgtbl;
 
 	for (i = 0; i < dma->num_pages; i++) {
 		/* Each entry needs to be in big endian format. */
-		*page_table = (u32) ((u64) dma->pg_map_arr[i] >> 32);
+		*page_table = cpu_to_le32((u64) dma->pg_map_arr[i] >> 32);
 		page_table++;
-		*page_table = (u32) dma->pg_map_arr[i];
+		*page_table = cpu_to_le32(dma->pg_map_arr[i] & 0xffffffff);
 		page_table++;
 	}
 }
···
 static void cnic_setup_page_tbl_le(struct cnic_dev *dev, struct cnic_dma *dma)
 {
 	int i;
-	u32 *page_table = dma->pgtbl;
+	__le32 *page_table = (__le32 *) dma->pgtbl;
 
 	for (i = 0; i < dma->num_pages; i++) {
 		/* Each entry needs to be in little endian format. */
-		*page_table = dma->pg_map_arr[i] & 0xffffffff;
+		*page_table = cpu_to_le32(dma->pg_map_arr[i] & 0xffffffff);
 		page_table++;
-		*page_table = (u32) ((u64) dma->pg_map_arr[i] >> 32);
+		*page_table = cpu_to_le32((u64) dma->pg_map_arr[i] >> 32);
 		page_table++;
 	}
 }

drivers/net/cxgb4/cxgb4_main.c

···
 	struct port_info *pi = netdev_priv(dev);
 	struct adapter *adapter = pi->adapter;
 
+	netif_carrier_off(dev);
+
 	if (!(adapter->flags & FULL_INIT_DONE)) {
 		err = cxgb_up(adapter);
 		if (err < 0)
···
 		pi->xact_addr_filt = -1;
 		pi->rx_offload = RX_CSO;
 		pi->port_id = i;
-		netif_carrier_off(netdev);
 		netdev->irq = pdev->irq;
 
 		netdev->features |= NETIF_F_SG | TSO_FLAGS;

drivers/net/pch_gbe/pch_gbe_main.c

···
 	struct net_device *netdev = pci_get_drvdata(pdev);
 	struct pch_gbe_adapter *adapter = netdev_priv(netdev);
 
-	flush_scheduled_work();
+	cancel_work_sync(&adapter->reset_task);
 	unregister_netdev(netdev);
 
 	pch_gbe_hal_phy_hw_reset(&adapter->hw);

drivers/net/tg3.c

···
 #define BAR_0	0
 #define BAR_2	2
 
-#if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
-#define TG3_VLAN_TAG_USED 1
-#else
-#define TG3_VLAN_TAG_USED 0
-#endif
-
 #include "tg3.h"
 
 #define DRV_MODULE_NAME		"tg3"
···
 #define TG3_TX_RING_BYTES	(sizeof(struct tg3_tx_buffer_desc) * \
 				 TG3_TX_RING_SIZE)
 #define NEXT_TX(N)		(((N) + 1) & (TG3_TX_RING_SIZE - 1))
-
-#define TG3_RX_DMA_ALIGN		16
-#define TG3_RX_HEADROOM			ALIGN(VLAN_HLEN, TG3_RX_DMA_ALIGN)
 
 #define TG3_DMA_BYTE_ENAB		64
 
···
 		struct sk_buff *skb;
 		dma_addr_t dma_addr;
 		u32 opaque_key, desc_idx, *post_ptr;
-		bool hw_vlan __maybe_unused = false;
-		u16 vtag __maybe_unused = 0;
 
 		desc_idx = desc->opaque & RXD_OPAQUE_INDEX_MASK;
 		opaque_key = desc->opaque & RXD_OPAQUE_RING_MASK;
···
 			tg3_recycle_rx(tnapi, tpr, opaque_key,
 				       desc_idx, *post_ptr);
 
-			copy_skb = netdev_alloc_skb(tp->dev, len + VLAN_HLEN +
+			copy_skb = netdev_alloc_skb(tp->dev, len +
 						    TG3_RAW_IP_ALIGN);
 			if (copy_skb == NULL)
 				goto drop_it_no_recycle;
 
-			skb_reserve(copy_skb, TG3_RAW_IP_ALIGN + VLAN_HLEN);
+			skb_reserve(copy_skb, TG3_RAW_IP_ALIGN);
 			skb_put(copy_skb, len);
 			pci_dma_sync_single_for_cpu(tp->pdev, dma_addr, len, PCI_DMA_FROMDEVICE);
 			skb_copy_from_linear_data(skb, copy_skb->data, len);
···
 		}
 
 		if (desc->type_flags & RXD_FLAG_VLAN &&
-		    !(tp->rx_mode & RX_MODE_KEEP_VLAN_TAG)) {
-			vtag = desc->err_vlan & RXD_VLAN_MASK;
-#if TG3_VLAN_TAG_USED
-			if (tp->vlgrp)
-				hw_vlan = true;
-			else
-#endif
-			{
-				struct vlan_ethhdr *ve = (struct vlan_ethhdr *)
-						    __skb_push(skb, VLAN_HLEN);
+		    !(tp->rx_mode & RX_MODE_KEEP_VLAN_TAG))
+			__vlan_hwaccel_put_tag(skb,
+					       desc->err_vlan & RXD_VLAN_MASK);
 
-				memmove(ve, skb->data + VLAN_HLEN,
-					ETH_ALEN * 2);
-				ve->h_vlan_proto = htons(ETH_P_8021Q);
-				ve->h_vlan_TCI = htons(vtag);
-			}
-		}
-
-#if TG3_VLAN_TAG_USED
-		if (hw_vlan)
-			vlan_gro_receive(&tnapi->napi, tp->vlgrp, vtag, skb);
-		else
-#endif
-			napi_gro_receive(&tnapi->napi, skb);
+		napi_gro_receive(&tnapi->napi, skb);
 
 		received++;
 		budget--;
···
 		base_flags |= TXD_FLAG_TCPUDP_CSUM;
 	}
 
-#if TG3_VLAN_TAG_USED
 	if (vlan_tx_tag_present(skb))
 		base_flags |= (TXD_FLAG_VLAN |
 			       (vlan_tx_tag_get(skb) << 16));
-#endif
 
 	len = skb_headlen(skb);
 
···
 			}
 		}
 	}
-#if TG3_VLAN_TAG_USED
+
 	if (vlan_tx_tag_present(skb))
 		base_flags |= (TXD_FLAG_VLAN |
 			       (vlan_tx_tag_get(skb) << 16));
-#endif
 
 	if ((tp->tg3_flags3 & TG3_FLG3_USE_JUMBO_BDFLAG) &&
 	    !mss && skb->len > VLAN_ETH_FRAME_LEN)
···
 	rx_mode = tp->rx_mode & ~(RX_MODE_PROMISC |
 				  RX_MODE_KEEP_VLAN_TAG);
 
+#if !defined(CONFIG_VLAN_8021Q) && !defined(CONFIG_VLAN_8021Q_MODULE)
 	/* When ASF is in use, we always keep the RX_MODE_KEEP_VLAN_TAG
 	 * flag clear.
-	 */
-#if TG3_VLAN_TAG_USED
-	if (!tp->vlgrp &&
-	    !(tp->tg3_flags & TG3_FLAG_ENABLE_ASF))
-		rx_mode |= RX_MODE_KEEP_VLAN_TAG;
-#else
-	/* By definition, VLAN is disabled always in this
-	 * case.
 	 */
 	if (!(tp->tg3_flags & TG3_FLAG_ENABLE_ASF))
 		rx_mode |= RX_MODE_KEEP_VLAN_TAG;
···
 	}
 	return -EOPNOTSUPP;
 }
-
-#if TG3_VLAN_TAG_USED
-static void tg3_vlan_rx_register(struct net_device *dev, struct vlan_group *grp)
-{
-	struct tg3 *tp = netdev_priv(dev);
-
-	if (!netif_running(dev)) {
-		tp->vlgrp = grp;
-		return;
-	}
-
-	tg3_netif_stop(tp);
-
-	tg3_full_lock(tp, 0);
-
-	tp->vlgrp = grp;
-
-	/* Update RX_MODE_KEEP_VLAN_TAG bit in RX_MODE register. */
-	__tg3_set_rx_mode(dev);
-
-	tg3_netif_start(tp);
-
-	tg3_full_unlock(tp);
-}
-#endif
 
 static int tg3_get_coalesce(struct net_device *dev, struct ethtool_coalesce *ec)
 {
···
 
 static void inline vlan_features_add(struct net_device *dev, unsigned long flags)
 {
-#if TG3_VLAN_TAG_USED
 	dev->vlan_features |= flags;
-#endif
 }
 
 static inline u32 tg3_rx_ret_ring_size(struct tg3 *tp)
···
 	else
 		tp->tg3_flags &= ~TG3_FLAG_POLL_SERDES;
 
-	tp->rx_offset = NET_IP_ALIGN + TG3_RX_HEADROOM;
+	tp->rx_offset = NET_IP_ALIGN;
 	tp->rx_copy_thresh = TG3_RX_COPY_THRESHOLD;
 	if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5701 &&
 	    (tp->tg3_flags & TG3_FLAG_PCIX_MODE) != 0) {
-		tp->rx_offset -= NET_IP_ALIGN;
+		tp->rx_offset = 0;
 #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS
 		tp->rx_copy_thresh = ~(u16)0;
 #endif
···
 	.ndo_do_ioctl		= tg3_ioctl,
 	.ndo_tx_timeout		= tg3_tx_timeout,
 	.ndo_change_mtu		= tg3_change_mtu,
-#if TG3_VLAN_TAG_USED
-	.ndo_vlan_rx_register	= tg3_vlan_rx_register,
-#endif
 #ifdef CONFIG_NET_POLL_CONTROLLER
 	.ndo_poll_controller	= tg3_poll_controller,
 #endif
···
 	.ndo_do_ioctl		= tg3_ioctl,
 	.ndo_tx_timeout		= tg3_tx_timeout,
 	.ndo_change_mtu		= tg3_change_mtu,
-#if TG3_VLAN_TAG_USED
-	.ndo_vlan_rx_register	= tg3_vlan_rx_register,
-#endif
 #ifdef CONFIG_NET_POLL_CONTROLLER
 	.ndo_poll_controller	= tg3_poll_controller,
 #endif
···
 
 	SET_NETDEV_DEV(dev, &pdev->dev);
 
-#if TG3_VLAN_TAG_USED
 	dev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX;
-#endif
 
 	tp = netdev_priv(dev);
 	tp->pdev = pdev;

drivers/net/tg3.h

···
 	u32				rx_std_max_post;
 	u32				rx_offset;
 	u32				rx_pkt_map_sz;
-#if TG3_VLAN_TAG_USED
-	struct vlan_group		*vlgrp;
-#endif
 
 
 	/* begin "everything else" cacheline(s) section */

drivers/net/usb/kaweth.c

···
 
 	if (fw->size > KAWETH_FIRMWARE_BUF_SIZE) {
 		err("Firmware too big: %zu", fw->size);
+		release_firmware(fw);
 		return -ENOSPC;
 	}
 	data_len = fw->size;

drivers/net/wireless/ath/ath9k/hw.c

···
 	else
 		ah->config.ht_enable = 0;
 
+	/* PAPRD needs some more work to be enabled */
+	ah->config.paprd_disable = 1;
+
 	ah->config.rx_intr_mitigation = true;
 	ah->config.pcieSerDesWrite = true;
 
···
 		pCap->rx_status_len = sizeof(struct ar9003_rxs);
 		pCap->tx_desc_len = sizeof(struct ar9003_txc);
 		pCap->txs_len = sizeof(struct ar9003_txs);
-		if (ah->eep_ops->get_eeprom(ah, EEP_PAPRD))
+		if (!ah->config.paprd_disable &&
+		    ah->eep_ops->get_eeprom(ah, EEP_PAPRD))
 			pCap->hw_caps |= ATH9K_HW_CAP_PAPRD;
 	} else {
 		pCap->tx_desc_len = sizeof(struct ath_desc);

drivers/net/wireless/ath/ath9k/hw.h

···
 	u32 pcie_waen;
 	u8 analog_shiftreg;
 	u8 ht_enable;
+	u8 paprd_disable;
 	u32 ofdm_trig_low;
 	u32 ofdm_trig_high;
 	u32 cck_trig_high;

drivers/net/wireless/ath/ath9k/main.c

···
 	u32 status = sc->intrstatus;
 	u32 rxmask;
 
-	ath9k_ps_wakeup(sc);
-
 	if (status & ATH9K_INT_FATAL) {
 		ath_reset(sc, true);
-		ath9k_ps_restore(sc);
 		return;
 	}
 
+	ath9k_ps_wakeup(sc);
 	spin_lock(&sc->sc_pcu_lock);
 
 	if (!ath9k_hw_check_alive(ah))
···
 	/* Stop ANI */
 	del_timer_sync(&common->ani.timer);
 
+	ath9k_ps_wakeup(sc);
 	spin_lock_bh(&sc->sc_pcu_lock);
 
 	ieee80211_stop_queues(hw);
···
 
 	/* Start ANI */
 	ath_start_ani(common);
+	ath9k_ps_restore(sc);
 
 	return r;
 }
···
 skip_chan_change:
 	if (changed & IEEE80211_CONF_CHANGE_POWER) {
 		sc->config.txpowlimit = 2 * conf->power_level;
+		ath9k_ps_wakeup(sc);
 		ath_update_txpow(sc);
+		ath9k_ps_restore(sc);
 	}
 
 	spin_lock_bh(&sc->wiphy_lock);

drivers/net/wireless/ath/ath9k/xmit.c

···
 	if (needreset) {
 		ath_dbg(ath9k_hw_common(sc->sc_ah), ATH_DBG_RESET,
 			"tx hung, resetting the chip\n");
-		ath9k_ps_wakeup(sc);
 		ath_reset(sc, true);
-		ath9k_ps_restore(sc);
 	}
 
 	ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work,

drivers/net/wireless/iwlwifi/iwl-4965.c

···
 	.fw_name_pre = IWL4965_FW_PRE,
 	.ucode_api_max = IWL4965_UCODE_API_MAX,
 	.ucode_api_min = IWL4965_UCODE_API_MIN,
+	.sku = IWL_SKU_A|IWL_SKU_G|IWL_SKU_N,
 	.valid_tx_ant = ANT_AB,
 	.valid_rx_ant = ANT_ABC,
 	.eeprom_ver = EEPROM_4965_EEPROM_VERSION,

drivers/net/wireless/iwlwifi/iwl-agn-eeprom.c

···
 
 	eeprom_sku = iwl_eeprom_query16(priv, EEPROM_SKU_CAP);
 
-	priv->cfg->sku = ((eeprom_sku & EEPROM_SKU_CAP_BAND_SELECTION) >>
+	if (!priv->cfg->sku) {
+		/* not using sku overwrite */
+		priv->cfg->sku =
+			((eeprom_sku & EEPROM_SKU_CAP_BAND_SELECTION) >>
 			EEPROM_SKU_CAP_BAND_POS);
-	if (eeprom_sku & EEPROM_SKU_CAP_11N_ENABLE)
-		priv->cfg->sku |= IWL_SKU_N;
-
+		if (eeprom_sku & EEPROM_SKU_CAP_11N_ENABLE)
+			priv->cfg->sku |= IWL_SKU_N;
+	}
 	if (!priv->cfg->sku) {
 		IWL_ERR(priv, "Invalid device sku\n");
 		return -EINVAL;

drivers/net/wireless/rt2x00/rt73usb.c

···
 	{ USB_DEVICE(0x04bb, 0x093d), USB_DEVICE_DATA(&rt73usb_ops) },
 	{ USB_DEVICE(0x148f, 0x2573), USB_DEVICE_DATA(&rt73usb_ops) },
 	{ USB_DEVICE(0x148f, 0x2671), USB_DEVICE_DATA(&rt73usb_ops) },
+	{ USB_DEVICE(0x0812, 0x3101), USB_DEVICE_DATA(&rt73usb_ops) },
 	/* Qcom */
 	{ USB_DEVICE(0x18e8, 0x6196), USB_DEVICE_DATA(&rt73usb_ops) },
 	{ USB_DEVICE(0x18e8, 0x6229), USB_DEVICE_DATA(&rt73usb_ops) },

drivers/net/wireless/rtlwifi/pci.c

···
 					struct sk_buff *uskb = NULL;
 					u8 *pdata;
 					uskb = dev_alloc_skb(skb->len + 128);
+					if (!uskb) {
+						RT_TRACE(rtlpriv,
+							(COMP_INTR | COMP_RECV),
+							DBG_EMERG,
+							("can't alloc rx skb\n"));
+						goto done;
+					}
 					memcpy(IEEE80211_SKB_RXCB(uskb),
 							&rx_status,
 							sizeof(rx_status));
···
 			new_skb = dev_alloc_skb(rtlpci->rxbuffersize);
 			if (unlikely(!new_skb)) {
 				RT_TRACE(rtlpriv, (COMP_INTR | COMP_RECV),
-					 DBG_DMESG,
+					 DBG_EMERG,
 					 ("can't alloc skb for rx\n"));
 				goto done;
 			}
···
 			struct sk_buff *skb =
 			    dev_alloc_skb(rtlpci->rxbuffersize);
 			u32 bufferaddress;
-			entry = &rtlpci->rx_ring[rx_queue_idx].desc[i];
 			if (!skb)
 				return 0;
+			entry = &rtlpci->rx_ring[rx_queue_idx].desc[i];
 
 			/*skb->dev = dev; */
 

include/net/bluetooth/hci_core.h

···
 	__u32		 link_mode;
 	__u8             auth_type;
 	__u8             sec_level;
+	__u8		 pending_sec_level;
 	__u8             power_save;
 	__u16            disc_timeout;
 	unsigned long	 pend;

include/net/sch_generic.h

···
 {
 	__skb_queue_tail(list, skb);
 	sch->qstats.backlog += qdisc_pkt_len(skb);
-	qdisc_bstats_update(sch, skb);
 
 	return NET_XMIT_SUCCESS;
 }
···
 {
 	struct sk_buff *skb = __skb_dequeue(list);
 
-	if (likely(skb != NULL))
+	if (likely(skb != NULL)) {
 		sch->qstats.backlog -= qdisc_pkt_len(skb);
+		qdisc_bstats_update(sch, skb);
+	}
 
 	return skb;
 }
···
 static inline unsigned int __qdisc_queue_drop_head(struct Qdisc *sch,
 					      struct sk_buff_head *list)
 {
-	struct sk_buff *skb = __qdisc_dequeue_head(sch, list);
+	struct sk_buff *skb = __skb_dequeue(list);
 
 	if (likely(skb != NULL)) {
 		unsigned int len = qdisc_pkt_len(skb);
+		sch->qstats.backlog -= len;
 		kfree_skb(skb);
 		return len;
 	}

lib/textsearch.c

···
  *
  * INTRODUCTION
  *
- *   The textsearch infrastructure provides text searching facitilies for
+ *   The textsearch infrastructure provides text searching facilities for
  *   both linear and non-linear data. Individual search algorithms are
  *   implemented in modules and chosen by the user.
  *
···
  *       to the algorithm to store persistent variables.
  *   (4) Core eventually resets the search offset and forwards the find()
  *       request to the algorithm.
- *   (5) Algorithm calls get_next_block() provided by the user continously
+ *   (5) Algorithm calls get_next_block() provided by the user continuously
  *       to fetch the data to be searched in block by block.
  *   (6) Algorithm invokes finish() after the last call to get_next_block
  *       to clean up any leftovers from get_next_block. (Optional)
···
  *   the pattern to look for and flags. As a flag, you can set TS_IGNORECASE
  *   to perform case insensitive matching. But it might slow down
  *   performance of algorithm, so you should use it at own your risk.
- *   The returned configuration may then be used for an arbitary
+ *   The returned configuration may then be used for an arbitrary
  *   amount of times and even in parallel as long as a separate struct
  *   ts_state variable is provided to every instance.
  *
  *   The actual search is performed by either calling textsearch_find_-
  *   continuous() for linear data or by providing an own get_next_block()
  *   implementation and calling textsearch_find(). Both functions return
- *   the position of the first occurrence of the patern or UINT_MAX if
- *   no match was found. Subsequent occurences can be found by calling
+ *   the position of the first occurrence of the pattern or UINT_MAX if
+ *   no match was found. Subsequent occurrences can be found by calling
  *   textsearch_next() regardless of the linearity of the data.
  *
  *   Once you're done using a configuration it must be given back via

net/bluetooth/hci_conn.c

···
 	hci_conn_hold(acl);
 
 	if (acl->state == BT_OPEN || acl->state == BT_CLOSED) {
-		acl->sec_level = sec_level;
+		acl->sec_level = BT_SECURITY_LOW;
+		acl->pending_sec_level = sec_level;
 		acl->auth_type = auth_type;
 		hci_acl_connect(acl);
-	} else {
-		if (acl->sec_level < sec_level)
-			acl->sec_level = sec_level;
-		if (acl->auth_type < auth_type)
-			acl->auth_type = auth_type;
 	}
 
 	if (type == ACL_LINK)
···
 {
 	BT_DBG("conn %p", conn);
 
+	if (conn->pending_sec_level > sec_level)
+		sec_level = conn->pending_sec_level;
+
 	if (sec_level > conn->sec_level)
-		conn->sec_level = sec_level;
+		conn->pending_sec_level = sec_level;
 	else if (conn->link_mode & HCI_LM_AUTH)
 		return 1;
+
+	/* Make sure we preserve an existing MITM requirement*/
+	auth_type |= (conn->auth_type & 0x01);
 
 	conn->auth_type = auth_type;
 

net/bluetooth/hci_core.c

···
 
 	destroy_workqueue(hdev->workqueue);
 
+	hci_dev_lock_bh(hdev);
+	hci_blacklist_clear(hdev);
+	hci_dev_unlock_bh(hdev);
+
 	__hci_dev_put(hdev);
 
 	return 0;

net/bluetooth/hci_event.c

···
 	if (conn->state != BT_CONFIG || !conn->out)
 		return 0;
 
-	if (conn->sec_level == BT_SECURITY_SDP)
+	if (conn->pending_sec_level == BT_SECURITY_SDP)
 		return 0;
 
 	/* Only request authentication for SSP connections or non-SSP
 	 * devices with sec_level HIGH */
 	if (!(hdev->ssp_mode > 0 && conn->ssp_mode > 0) &&
-					conn->sec_level != BT_SECURITY_HIGH)
+				conn->pending_sec_level != BT_SECURITY_HIGH)
 		return 0;
 
 	return 1;
···
 
 	conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
 	if (conn) {
-		if (!ev->status)
+		if (!ev->status) {
 			conn->link_mode |= HCI_LM_AUTH;
-		else
+			conn->sec_level = conn->pending_sec_level;
+		} else
 			conn->sec_level = BT_SECURITY_LOW;
 
 		clear_bit(HCI_CONN_AUTH_PEND, &conn->pend);

net/bluetooth/l2cap.c

···
 	}
 }
 
+static inline u8 l2cap_get_auth_type(struct sock *sk)
+{
+	if (sk->sk_type == SOCK_RAW) {
+		switch (l2cap_pi(sk)->sec_level) {
+		case BT_SECURITY_HIGH:
+			return HCI_AT_DEDICATED_BONDING_MITM;
+		case BT_SECURITY_MEDIUM:
+			return HCI_AT_DEDICATED_BONDING;
+		default:
+			return HCI_AT_NO_BONDING;
+		}
+	} else if (l2cap_pi(sk)->psm == cpu_to_le16(0x0001)) {
+		if (l2cap_pi(sk)->sec_level == BT_SECURITY_LOW)
+			l2cap_pi(sk)->sec_level = BT_SECURITY_SDP;
+
+		if (l2cap_pi(sk)->sec_level == BT_SECURITY_HIGH)
+			return HCI_AT_NO_BONDING_MITM;
+		else
+			return HCI_AT_NO_BONDING;
+	} else {
+		switch (l2cap_pi(sk)->sec_level) {
+		case BT_SECURITY_HIGH:
+			return HCI_AT_GENERAL_BONDING_MITM;
+		case BT_SECURITY_MEDIUM:
+			return HCI_AT_GENERAL_BONDING;
+		default:
+			return HCI_AT_NO_BONDING;
+		}
+	}
+}
+
 /* Service level security */
 static inline int l2cap_check_security(struct sock *sk)
 {
 	struct l2cap_conn *conn = l2cap_pi(sk)->conn;
 	__u8 auth_type;
 
-	if (l2cap_pi(sk)->psm == cpu_to_le16(0x0001)) {
-		if (l2cap_pi(sk)->sec_level == BT_SECURITY_HIGH)
-			auth_type = HCI_AT_NO_BONDING_MITM;
-		else
-			auth_type = HCI_AT_NO_BONDING;
-
-		if (l2cap_pi(sk)->sec_level == BT_SECURITY_LOW)
-			l2cap_pi(sk)->sec_level = BT_SECURITY_SDP;
-	} else {
-		switch (l2cap_pi(sk)->sec_level) {
-		case BT_SECURITY_HIGH:
-			auth_type = HCI_AT_GENERAL_BONDING_MITM;
-			break;
-		case BT_SECURITY_MEDIUM:
-			auth_type = HCI_AT_GENERAL_BONDING;
-			break;
-		default:
-			auth_type = HCI_AT_NO_BONDING;
-			break;
-		}
-	}
+	auth_type = l2cap_get_auth_type(sk);
 
 	return hci_conn_security(conn->hcon, l2cap_pi(sk)->sec_level,
 								auth_type);
···
 
 	err = -ENOMEM;
 
-	if (sk->sk_type == SOCK_RAW) {
-		switch (l2cap_pi(sk)->sec_level) {
-		case BT_SECURITY_HIGH:
-			auth_type = HCI_AT_DEDICATED_BONDING_MITM;
-			break;
-		case BT_SECURITY_MEDIUM:
-			auth_type = HCI_AT_DEDICATED_BONDING;
-			break;
-		default:
-			auth_type = HCI_AT_NO_BONDING;
-			break;
-		}
-	} else if (l2cap_pi(sk)->psm == cpu_to_le16(0x0001)) {
-		if (l2cap_pi(sk)->sec_level == BT_SECURITY_HIGH)
-			auth_type = HCI_AT_NO_BONDING_MITM;
-		else
-			auth_type = HCI_AT_NO_BONDING;
-
-		if (l2cap_pi(sk)->sec_level == BT_SECURITY_LOW)
-			l2cap_pi(sk)->sec_level = BT_SECURITY_SDP;
-	} else {
-		switch (l2cap_pi(sk)->sec_level) {
-		case BT_SECURITY_HIGH:
-			auth_type = HCI_AT_GENERAL_BONDING_MITM;
-			break;
-		case BT_SECURITY_MEDIUM:
-			auth_type = HCI_AT_GENERAL_BONDING;
-			break;
-		default:
-			auth_type = HCI_AT_NO_BONDING;
-			break;
-		}
-	}
+	auth_type = l2cap_get_auth_type(sk);
 
 	hcon = hci_connect(hdev, ACL_LINK, dst,
 					l2cap_pi(sk)->sec_level, auth_type);
···
 		if (sk->sk_type != SOCK_SEQPACKET &&
 				sk->sk_type != SOCK_STREAM) {
 			l2cap_sock_clear_timer(sk);
-			sk->sk_state = BT_CONNECTED;
+			if (l2cap_check_security(sk))
+				sk->sk_state = BT_CONNECTED;
 		} else
 			l2cap_do_start(sk);
 	}
···
 		if (pi->mode == L2CAP_MODE_STREAMING) {
 			l2cap_streaming_send(sk);
 		} else {
-			if (pi->conn_state & L2CAP_CONN_REMOTE_BUSY &&
-					pi->conn_state && L2CAP_CONN_WAIT_F) {
+			if ((pi->conn_state & L2CAP_CONN_REMOTE_BUSY) &&
+					(pi->conn_state & L2CAP_CONN_WAIT_F)) {
 				err = len;
 				break;
 			}

net/bluetooth/rfcomm/core.c

···
 			 * initiator rfcomm_process_rx already calls
 			 * rfcomm_session_put() */
 			if (s->sock->sk->sk_state != BT_CLOSED)
-				rfcomm_session_put(s);
+				if (list_empty(&s->dlcs))
+					rfcomm_session_put(s);
 			break;
 		}
 	}

net/core/dev.c

···
  *	@ha: hardware address
  *
  *	Search for an interface by MAC address. Returns NULL if the device
- *	is not found or a pointer to the device. The caller must hold RCU
+ *	is not found or a pointer to the device.
+ *	The caller must hold RCU or RTNL.
  *	The returned device has not had its ref count increased
  *	and the caller must therefore be careful about locking
  *

net/core/ethtool.c

···
 	if (regs.len > reglen)
 		regs.len = reglen;
 
-	regbuf = vmalloc(reglen);
+	regbuf = vzalloc(reglen);
 	if (!regbuf)
 		return -ENOMEM;
 

net/core/skbuff.c

···
 
 merge:
 	if (offset > headlen) {
-		skbinfo->frags[0].page_offset += offset - headlen;
-		skbinfo->frags[0].size -= offset - headlen;
+		unsigned int eat = offset - headlen;
+
+		skbinfo->frags[0].page_offset += eat;
+		skbinfo->frags[0].size -= eat;
+		skb->data_len -= eat;
+		skb->len -= eat;
 		offset = headlen;
 	}
 

net/dcb/dcbnl.c

···
 	u8 up, idtype;
 	int ret = -EINVAL;
 
-	if (!tb[DCB_ATTR_APP] || !netdev->dcbnl_ops->getapp)
+	if (!tb[DCB_ATTR_APP])
 		goto out;
 
 	ret = nla_parse_nested(app_tb, DCB_APP_ATTR_MAX, tb[DCB_ATTR_APP],
···
 		goto out;
 
 	id = nla_get_u16(app_tb[DCB_APP_ATTR_ID]);
-	up = netdev->dcbnl_ops->getapp(netdev, idtype, id);
+
+	if (netdev->dcbnl_ops->getapp) {
+		up = netdev->dcbnl_ops->getapp(netdev, idtype, id);
+	} else {
+		struct dcb_app app = {
+					.selector = idtype,
+					.protocol = id,
+				     };
+		up = dcb_getapp(netdev, &app);
+	}
 
 	/* send this back */
 	dcbnl_skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);

net/ipv4/arp.c

···
 		IPV4_DEVCONF_ALL(net, PROXY_ARP) = on;
 		return 0;
 	}
-	if (__in_dev_get_rcu(dev)) {
-		IN_DEV_CONF_SET(__in_dev_get_rcu(dev), PROXY_ARP, on);
+	if (__in_dev_get_rtnl(dev)) {
+		IN_DEV_CONF_SET(__in_dev_get_rtnl(dev), PROXY_ARP, on);
 		return 0;
 	}
 	return -ENXIO;
 }
 
-/* must be called with rcu_read_lock() */
 static int arp_req_set_public(struct net *net, struct arpreq *r,
 		struct net_device *dev)
 {
···
 	if (!(r.arp_flags & ATF_NETMASK))
 		((struct sockaddr_in *)&r.arp_netmask)->sin_addr.s_addr =
 							   htonl(0xFFFFFFFFUL);
-	rcu_read_lock();
+	rtnl_lock();
 	if (r.arp_dev[0]) {
 		err = -ENODEV;
-		dev = dev_get_by_name_rcu(net, r.arp_dev);
+		dev = __dev_get_by_name(net, r.arp_dev);
 		if (dev == NULL)
 			goto out;
 
···
 		break;
 	}
 out:
-	rcu_read_unlock();
+	rtnl_unlock();
 	if (cmd == SIOCGARP && !err && copy_to_user(arg, &r, sizeof(r)))
 		err = -EFAULT;
 	return err;

net/ipv4/inetpeer.c

···
 struct inet_peer *inet_getpeer(struct inetpeer_addr *daddr, int create)
 {
 	struct inet_peer __rcu **stack[PEER_MAXDEPTH], ***stackptr;
-	struct inet_peer_base *base = family_to_base(AF_INET);
+	struct inet_peer_base *base = family_to_base(daddr->family);
 	struct inet_peer *p;
 
 	/* Look up for the address quickly, lockless.

net/ipv4/tcp_input.c

···
 			if (!skb_copy_datagram_iovec(skb, 0, tp->ucopy.iov, chunk)) {
 				tp->ucopy.len -= chunk;
 				tp->copied_seq += chunk;
-				eaten = (chunk == skb->len && !th->fin);
+				eaten = (chunk == skb->len);
 				tcp_rcv_space_adjust(sk);
 			}
 			local_bh_disable();

net/ipv4/tcp_ipv4.c

···
 				}
 				req = req->dl_next;
 			}
-			st->offset = 0;
 			if (++st->sbucket >= icsk->icsk_accept_queue.listen_opt->nr_table_entries)
 				break;
 get_req:

net/ipv6/addrconf.c

···
 	struct net *net = dev_net(dev);
 	struct inet6_dev *idev;
 	struct inet6_ifaddr *ifa;
-	LIST_HEAD(keep_list);
-	int state;
+	int state, i;
 
 	ASSERT_RTNL();
 
-	/* Flush routes if device is being removed or it is not loopback */
-	if (how || !(dev->flags & IFF_LOOPBACK))
-		rt6_ifdown(net, dev);
+	rt6_ifdown(net, dev);
+	neigh_ifdown(&nd_tbl, dev);
 
 	idev = __in6_dev_get(dev);
 	if (idev == NULL)
···
 		/* Step 1.5: remove snmp6 entry */
 		snmp6_unregister_dev(idev);
 
+	}
+
+	/* Step 2: clear hash table */
+	for (i = 0; i < IN6_ADDR_HSIZE; i++) {
+		struct hlist_head *h = &inet6_addr_lst[i];
+		struct hlist_node *n;
+
+		spin_lock_bh(&addrconf_hash_lock);
+	restart:
+		hlist_for_each_entry_rcu(ifa, n, h, addr_lst) {
+			if (ifa->idev == idev) {
+				hlist_del_init_rcu(&ifa->addr_lst);
+				addrconf_del_timer(ifa);
+				goto restart;
+			}
+		}
+		spin_unlock_bh(&addrconf_hash_lock);
 	}
 
 	write_lock_bh(&idev->lock);
···
 				       struct inet6_ifaddr, if_list);
 		addrconf_del_timer(ifa);
 
-		/* If just doing link down, and address is permanent
-		   and not link-local, then retain it. */
-		if (!how &&
-		    (ifa->flags&IFA_F_PERMANENT) &&
-		    !(ipv6_addr_type(&ifa->addr) & IPV6_ADDR_LINKLOCAL)) {
-			list_move_tail(&ifa->if_list, &keep_list);
+		list_del(&ifa->if_list);
 
-			/* If not doing DAD on this address, just keep it. */
-			if ((dev->flags&(IFF_NOARP|IFF_LOOPBACK)) ||
-			    idev->cnf.accept_dad <= 0 ||
-			    (ifa->flags & IFA_F_NODAD))
-				continue;
+		write_unlock_bh(&idev->lock);
 
-			/* If it was tentative already, no need to notify */
-			if (ifa->flags & IFA_F_TENTATIVE)
-				continue;
+		spin_lock_bh(&ifa->state_lock);
+		state = ifa->state;
+		ifa->state = INET6_IFADDR_STATE_DEAD;
+		spin_unlock_bh(&ifa->state_lock);
 
-			/* Flag it for later restoration when link comes up */
-			ifa->flags |= IFA_F_TENTATIVE;
-			ifa->state = INET6_IFADDR_STATE_DAD;
-		} else {
-			list_del(&ifa->if_list);
-
-			/* clear hash table */
-			spin_lock_bh(&addrconf_hash_lock);
-			hlist_del_init_rcu(&ifa->addr_lst);
-			spin_unlock_bh(&addrconf_hash_lock);
-
-			write_unlock_bh(&idev->lock);
-			spin_lock_bh(&ifa->state_lock);
-			state = ifa->state;
-			ifa->state = INET6_IFADDR_STATE_DEAD;
-			spin_unlock_bh(&ifa->state_lock);
-
-			if (state != INET6_IFADDR_STATE_DEAD) {
-				__ipv6_ifa_notify(RTM_DELADDR, ifa);
-				atomic_notifier_call_chain(&inet6addr_chain,
-							   NETDEV_DOWN, ifa);
-			}
-
-			in6_ifa_put(ifa);
-			write_lock_bh(&idev->lock);
+		if (state != INET6_IFADDR_STATE_DEAD) {
+			__ipv6_ifa_notify(RTM_DELADDR, ifa);
+			atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifa);
 		}
-	}
+		in6_ifa_put(ifa);
 
-	list_splice(&keep_list, &idev->addr_list);
+		write_lock_bh(&idev->lock);
+	}
 
 	write_unlock_bh(&idev->lock);
 
···
 		addrconf_leave_solict(ifp->idev, &ifp->addr);
 		dst_hold(&ifp->rt->dst);
 
-		if (ifp->state == INET6_IFADDR_STATE_DEAD &&
-		    ip6_del_rt(ifp->rt))
+		if (ip6_del_rt(ifp->rt))
 			dst_free(&ifp->rt->dst);
 		break;
 	}

net/ipv6/route.c

···
 #define RT6_TRACE(x...) do { ; } while (0)
 #endif
 
-#define CLONE_OFFLINK_ROUTE 0
-
 static struct rt6_info * ip6_rt_copy(struct rt6_info *ort);
 static struct dst_entry	*ip6_dst_check(struct dst_entry *dst, u32 cookie);
 static unsigned int	 ip6_default_advmss(const struct dst_entry *dst);
···
 
 	if (!rt->rt6i_nexthop && !(rt->rt6i_flags & RTF_NONEXTHOP))
 		nrt = rt6_alloc_cow(rt, &fl->fl6_dst, &fl->fl6_src);
-	else {
-#if CLONE_OFFLINK_ROUTE
+	else
 		nrt = rt6_alloc_clone(rt, &fl->fl6_dst);
-#else
-		goto out2;
-#endif
-	}
 
 	dst_release(&rt->dst);
 	rt = nrt ? : net->ipv6.ip6_null_entry;

net/ipv6/xfrm6_policy.c

···
 	if (!xdst->u.rt6.rt6i_idev)
 		return -ENODEV;
 
+	xdst->u.rt6.rt6i_peer = rt->rt6i_peer;
+	if (rt->rt6i_peer)
+		atomic_inc(&rt->rt6i_peer->refcnt);
+
 	/* Sheit... I remember I did this right. Apparently,
 	 * it was magically lost, so this code needs audit */
 	xdst->u.rt6.rt6i_flags = rt->rt6i_flags & (RTF_ANYCAST |
···
 
 	if (likely(xdst->u.rt6.rt6i_idev))
 		in6_dev_put(xdst->u.rt6.rt6i_idev);
+	if (likely(xdst->u.rt6.rt6i_peer))
+		inet_putpeer(xdst->u.rt6.rt6i_peer);
 	xfrm_dst_destroy(xdst);
 }
 

net/mac80211/tx.c

···
 
 	sdata = vif_to_sdata(vif);
 
+	if (!ieee80211_sdata_running(sdata))
+		goto out;
+
 	if (tim_offset)
 		*tim_offset = 0;
 	if (tim_length)

net/sched/sch_cbq.c

···
 	ret = qdisc_enqueue(skb, cl->q);
 	if (ret == NET_XMIT_SUCCESS) {
 		sch->q.qlen++;
-		qdisc_bstats_update(sch, skb);
 		cbq_mark_toplevel(q, cl);
 		if (!cl->next_alive)
 			cbq_activate_class(cl);
···
 		ret = qdisc_enqueue(skb, cl->q);
 		if (ret == NET_XMIT_SUCCESS) {
 			sch->q.qlen++;
-			qdisc_bstats_update(sch, skb);
 			if (!cl->next_alive)
 				cbq_activate_class(cl);
 			return 0;
···
 
 		skb = cbq_dequeue_1(sch);
 		if (skb) {
+			qdisc_bstats_update(sch, skb);
 			sch->q.qlen--;
 			sch->flags &= ~TCQ_F_THROTTLED;
 			return skb;

net/sched/sch_drr.c

···
 	}
 
 	bstats_update(&cl->bstats, skb);
-	qdisc_bstats_update(sch, skb);
 
 	sch->q.qlen++;
 	return err;
···
 			skb = qdisc_dequeue_peeked(cl->qdisc);
 			if (cl->qdisc->q.qlen == 0)
 				list_del(&cl->alist);
+			qdisc_bstats_update(sch, skb);
 			sch->q.qlen--;
 			return skb;
 		}

net/sched/sch_dsmark.c

···
 		return err;
 	}
 
-	qdisc_bstats_update(sch, skb);
 	sch->q.qlen++;
 
 	return NET_XMIT_SUCCESS;
···
 	if (skb == NULL)
 		return NULL;
 
+	qdisc_bstats_update(sch, skb);
 	sch->q.qlen--;
 
 	index = skb->tc_index & (p->indices - 1);

net/sched/sch_fifo.c

···
 
 static int pfifo_tail_enqueue(struct sk_buff *skb, struct Qdisc* sch)
 {
-	struct sk_buff *skb_head;
 	struct fifo_sched_data *q = qdisc_priv(sch);
 
 	if (likely(skb_queue_len(&sch->q) < q->limit))
 		return qdisc_enqueue_tail(skb, sch);
 
 	/* queue full, remove one skb to fulfill the limit */
-	skb_head = qdisc_dequeue_head(sch);
+	__qdisc_queue_drop_head(sch, &sch->q);
 	sch->qstats.drops++;
-	kfree_skb(skb_head);
-
 	qdisc_enqueue_tail(skb, sch);
 
 	return NET_XMIT_CN;

net/sched/sch_hfsc.c

···
 		set_active(cl, qdisc_pkt_len(skb));
 
 	bstats_update(&cl->bstats, skb);
-	qdisc_bstats_update(sch, skb);
 	sch->q.qlen++;
 
 	return NET_XMIT_SUCCESS;
···
 	}
 
 	sch->flags &= ~TCQ_F_THROTTLED;
+	qdisc_bstats_update(sch, skb);
 	sch->q.qlen--;
 
 	return skb;

net/sched/sch_htb.c

···
 	}
 
 	sch->q.qlen++;
-	qdisc_bstats_update(sch, skb);
 	return NET_XMIT_SUCCESS;
 }
 
···
 
 static struct sk_buff *htb_dequeue(struct Qdisc *sch)
 {
-	struct sk_buff *skb = NULL;
+	struct sk_buff *skb;
 	struct htb_sched *q = qdisc_priv(sch);
 	int level;
 	psched_time_t next_event;
···
 	/* try to dequeue direct packets as high prio (!) to minimize cpu work */
 	skb = __skb_dequeue(&q->direct_queue);
 	if (skb != NULL) {
+ok:
+		qdisc_bstats_update(sch, skb);
 		sch->flags &= ~TCQ_F_THROTTLED;
 		sch->q.qlen--;
 		return skb;
···
 			int prio = ffz(m);
 			m |= 1 << prio;
 			skb = htb_dequeue_tree(q, prio, level);
-			if (likely(skb != NULL)) {
-				sch->q.qlen--;
-				sch->flags &= ~TCQ_F_THROTTLED;
-				goto fin;
-			}
+			if (likely(skb != NULL))
+				goto ok;
 		}
 	}
 	sch->qstats.overlimits++;

net/sched/sch_multiq.c

···
 
 	ret = qdisc_enqueue(skb, qdisc);
 	if (ret == NET_XMIT_SUCCESS) {
-		qdisc_bstats_update(sch, skb);
 		sch->q.qlen++;
 		return NET_XMIT_SUCCESS;
 	}
···
 			qdisc = q->queues[q->curband];
 			skb = qdisc->dequeue(qdisc);
 			if (skb) {
+				qdisc_bstats_update(sch, skb);
 				sch->q.qlen--;
 				return skb;
 			}

net/sched/sch_netem.c

···
 
 	if (likely(ret == NET_XMIT_SUCCESS)) {
 		sch->q.qlen++;
-		qdisc_bstats_update(sch, skb);
 	} else if (net_xmit_drop_count(ret)) {
 		sch->qstats.drops++;
 	}
···
 				skb->tstamp.tv64 = 0;
 #endif
 			pr_debug("netem_dequeue: return skb=%p\n", skb);
+			qdisc_bstats_update(sch, skb);
 			sch->q.qlen--;
 			return skb;
 		}
···
 		__skb_queue_after(list, skb, nskb);
 
 		sch->qstats.backlog += qdisc_pkt_len(nskb);
-		qdisc_bstats_update(sch, nskb);
 
 		return NET_XMIT_SUCCESS;
 	}

net/sched/sch_prio.c

···
 
 	ret = qdisc_enqueue(skb, qdisc);
 	if (ret == NET_XMIT_SUCCESS) {
-		qdisc_bstats_update(sch, skb);
 		sch->q.qlen++;
 		return NET_XMIT_SUCCESS;
 	}
···
 		struct Qdisc *qdisc = q->queues[prio];
 		struct sk_buff *skb = qdisc->dequeue(qdisc);
 		if (skb) {
+			qdisc_bstats_update(sch, skb);
 			sch->q.qlen--;
 			return skb;
 		}

net/sched/sch_red.c

···
 
 	ret = qdisc_enqueue(skb, child);
 	if (likely(ret == NET_XMIT_SUCCESS)) {
-		qdisc_bstats_update(sch, skb);
 		sch->q.qlen++;
 	} else if (net_xmit_drop_count(ret)) {
 		q->stats.pdrop++;
···
 	struct Qdisc *child = q->qdisc;
 
 	skb = child->dequeue(child);
-	if (skb)
+	if (skb) {
+		qdisc_bstats_update(sch, skb);
 		sch->q.qlen--;
-	else if (!red_is_idling(&q->parms))
-		red_start_of_idle_period(&q->parms);
-
+	} else {
+		if (!red_is_idling(&q->parms))
+			red_start_of_idle_period(&q->parms);
+	}
 	return skb;
 }
 

net/sched/sch_sfq.c

···
 		q->tail = slot;
 		slot->allot = q->scaled_quantum;
 	}
-	if (++sch->q.qlen <= q->limit) {
-		qdisc_bstats_update(sch, skb);
+	if (++sch->q.qlen <= q->limit)
 		return NET_XMIT_SUCCESS;
-	}
 
 	sfq_drop(sch);
 	return NET_XMIT_CN;
···
 	}
 	skb = slot_dequeue_head(slot);
 	sfq_dec(q, a);
+	qdisc_bstats_update(sch, skb);
 	sch->q.qlen--;
 	sch->qstats.backlog -= qdisc_pkt_len(skb);
 

net/sched/sch_tbf.c

···
 	}
 
 	sch->q.qlen++;
-	qdisc_bstats_update(sch, skb);
 	return NET_XMIT_SUCCESS;
 }
 
···
 			q->ptokens = ptoks;
 			sch->q.qlen--;
 			sch->flags &= ~TCQ_F_THROTTLED;
+			qdisc_bstats_update(sch, skb);
 			return skb;
 		}
 

net/sched/sch_teql.c

···
 
 	if (q->q.qlen < dev->tx_queue_len) {
 		__skb_queue_tail(&q->q, skb);
-		qdisc_bstats_update(sch, skb);
 		return NET_XMIT_SUCCESS;
 	}
 
···
 			dat->m->slaves = sch;
 			netif_wake_queue(m);
 		}
+	} else {
+		qdisc_bstats_update(sch, skb);
 	}
 	sch->q.qlen = dat->q.qlen + dat_queue->qdisc->q.qlen;
 	return skb;