Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/jkirsher/net-queue

Jeff Kirsher says:

====================
Intel Wired LAN Driver Updates 2015-06-26

This series contains fixes for igb, e1000e and i40evf.

Todd disables IPv6 extension header processing due to a hardware errata
and bumps the driver version.

Yanir provides six fixes for e1000e. First is a fix for a locking issue
where we were not always taking the pci_bus_sem semaphore all the time
when calling pci_disable_link_state_locked(), so fix the code to only call
pci_disable_link_state_locked() when the semaphore has been acquired,
otherwise call pci_disable_link_state(). A previous fix for i219 where
the hardware prevented ULP entry caused EEE in Sx not the be enabled, so
modify the code flow that allows both ULP and EEE in Sx. Fix an issue
when running 10/100 full duplex on i219 where CRC errors were occurring
by increasing the IPG from 8 to 0xC as per the hardware developers.
Fix a data corruption issue found on some platforms by increasing the
minimum gap between the PHY FIFO read and write pointers. Fix i219,
which does not require the K1 workaround for LPT devices.

Mitch provides a i40evf fix for a panic when changing MTU. Down was
requesting queue disables, but then exited immediately without waiting
for the queues to actually be disabled. This could allow any function
called after i40evf_down() to run immediately, including i40evf_up(),
and causes a memory leak. Fixed the issue by removing the whole
reinit_locked function which allows for the driver to handle the state
changes by requesting reset from the periodic timer. The second fix
resolves an issue where RSS was being configured as though it is using
the maximum number of queue. This can cause the device to drop a lot
of receive traffic, as the packets get assigned to non-functional queues.
This is resolved by only configuring RSS with the number of active queues.
====================

Signed-off-by: David S. Miller <[e-mail]>

drivers/net/ethernet/intel/e1000e/ich8lan.c

···
 	if (ret_val)
 		return false;
 out:
-	if ((hw->mac.type == e1000_pch_lpt) ||
-	    (hw->mac.type == e1000_pch_spt)) {
-		/* Unforce SMBus mode in PHY */
-		e1e_rphy_locked(hw, CV_SMB_CTRL, &phy_reg);
-		phy_reg &= ~CV_SMB_CTRL_FORCE_SMBUS;
-		e1e_wphy_locked(hw, CV_SMB_CTRL, phy_reg);
+	if ((hw->mac.type == e1000_pch_lpt) || (hw->mac.type == e1000_pch_spt)) {
+		/* Only unforce SMBus if ME is not active */
+		if (!(er32(FWSM) & E1000_ICH_FWSM_FW_VALID)) {
+			/* Unforce SMBus mode in PHY */
+			e1e_rphy_locked(hw, CV_SMB_CTRL, &phy_reg);
+			phy_reg &= ~CV_SMB_CTRL_FORCE_SMBUS;
+			e1e_wphy_locked(hw, CV_SMB_CTRL, phy_reg);
 
-		/* Unforce SMBus mode in MAC */
-		mac_reg = er32(CTRL_EXT);
-		mac_reg &= ~E1000_CTRL_EXT_FORCE_SMBUS;
-		ew32(CTRL_EXT, mac_reg);
+			/* Unforce SMBus mode in MAC */
+			mac_reg = er32(CTRL_EXT);
+			mac_reg &= ~E1000_CTRL_EXT_FORCE_SMBUS;
+			ew32(CTRL_EXT, mac_reg);
+		}
 	}
 
 	return true;
···
 	u32 mac_reg;
 	s32 ret_val = 0;
 	u16 phy_reg;
+	u16 oem_reg = 0;
 
 	if ((hw->mac.type < e1000_pch_lpt) ||
 	    (hw->adapter->pdev->device == E1000_DEV_ID_PCH_LPT_I217_LM) ||
···
 	if (ret_val)
 		goto out;
 
-	/* Si workaround for ULP entry flow on i127/rev6 h/w.  Enable
-	 * LPLU and disable Gig speed when entering ULP
-	 */
-	if ((hw->phy.type == e1000_phy_i217) && (hw->phy.revision == 6)) {
-		ret_val = e1000_read_phy_reg_hv_locked(hw, HV_OEM_BITS,
-						       &phy_reg);
-		if (ret_val)
-			goto release;
-		phy_reg |= HV_OEM_BITS_LPLU | HV_OEM_BITS_GBE_DIS;
-		ret_val = e1000_write_phy_reg_hv_locked(hw, HV_OEM_BITS,
-							phy_reg);
-		if (ret_val)
-			goto release;
-	}
-
 	/* Force SMBus mode in PHY */
 	ret_val = e1000_read_phy_reg_hv_locked(hw, CV_SMB_CTRL, &phy_reg);
 	if (ret_val)
···
 	mac_reg |= E1000_CTRL_EXT_FORCE_SMBUS;
 	ew32(CTRL_EXT, mac_reg);
 
+	/* Si workaround for ULP entry flow on i127/rev6 h/w.  Enable
+	 * LPLU and disable Gig speed when entering ULP
+	 */
+	if ((hw->phy.type == e1000_phy_i217) && (hw->phy.revision == 6)) {
+		ret_val = e1000_read_phy_reg_hv_locked(hw, HV_OEM_BITS,
+						       &oem_reg);
+		if (ret_val)
+			goto release;
+
+		phy_reg = oem_reg;
+		phy_reg |= HV_OEM_BITS_LPLU | HV_OEM_BITS_GBE_DIS;
+
+		ret_val = e1000_write_phy_reg_hv_locked(hw, HV_OEM_BITS,
+							phy_reg);
+
+		if (ret_val)
+			goto release;
+	}
+
 	/* Set Inband ULP Exit, Reset to SMBus mode and
 	 * Disable SMBus Release on PERST# in PHY
 	 */
···
 	if (to_sx) {
 		if (er32(WUFC) & E1000_WUFC_LNKC)
 			phy_reg |= I218_ULP_CONFIG1_WOL_HOST;
+		else
+			phy_reg &= ~I218_ULP_CONFIG1_WOL_HOST;
 
 		phy_reg |= I218_ULP_CONFIG1_STICKY_ULP;
+		phy_reg &= ~I218_ULP_CONFIG1_INBAND_EXIT;
 	} else {
 		phy_reg |= I218_ULP_CONFIG1_INBAND_EXIT;
+		phy_reg &= ~I218_ULP_CONFIG1_STICKY_ULP;
+		phy_reg &= ~I218_ULP_CONFIG1_WOL_HOST;
 	}
 	e1000_write_phy_reg_hv_locked(hw, I218_ULP_CONFIG1, phy_reg);
 
···
 	/* Commit ULP changes in PHY by starting auto ULP configuration */
 	phy_reg |= I218_ULP_CONFIG1_START;
 	e1000_write_phy_reg_hv_locked(hw, I218_ULP_CONFIG1, phy_reg);
+
+	if ((hw->phy.type == e1000_phy_i217) && (hw->phy.revision == 6) &&
+	    to_sx && (er32(STATUS) & E1000_STATUS_LU)) {
+		ret_val = e1000_write_phy_reg_hv_locked(hw, HV_OEM_BITS,
+							oem_reg);
+		if (ret_val)
+			goto release;
+	}
+
 release:
 	hw->phy.ops.release(hw);
 out:
···
 	if (((hw->mac.type == e1000_pch2lan) ||
 	     (hw->mac.type == e1000_pch_lpt) ||
 	     (hw->mac.type == e1000_pch_spt)) && link) {
-		u32 reg;
+		u16 speed, duplex;
 
-		reg = er32(STATUS);
+		e1000e_get_speed_and_duplex_copper(hw, &speed, &duplex);
 		tipg_reg = er32(TIPG);
 		tipg_reg &= ~E1000_TIPG_IPGT_MASK;
 
-		if (!(reg & (E1000_STATUS_FD | E1000_STATUS_SPEED_MASK))) {
+		if (duplex == HALF_DUPLEX && speed == SPEED_10) {
 			tipg_reg |= 0xFF;
 			/* Reduce Rx latency in analog PHY */
 			emi_val = 0;
+		} else if (hw->mac.type == e1000_pch_spt &&
+			   duplex == FULL_DUPLEX && speed != SPEED_1000) {
+			tipg_reg |= 0xC;
+			emi_val = 1;
 		} else {
 
 			/* Roll back the default values */
···
 
 		if (ret_val)
 			return ret_val;
+
+		if (hw->mac.type == e1000_pch_spt) {
+			u16 data;
+			u16 ptr_gap;
+
+			if (speed == SPEED_1000) {
+				ret_val = hw->phy.ops.acquire(hw);
+				if (ret_val)
+					return ret_val;
+
+				ret_val = e1e_rphy_locked(hw,
+							  PHY_REG(776, 20),
+							  &data);
+				if (ret_val) {
+					hw->phy.ops.release(hw);
+					return ret_val;
+				}
+
+				ptr_gap = (data & (0x3FF << 2)) >> 2;
+				if (ptr_gap < 0x18) {
+					data &= ~(0x3FF << 2);
+					data |= (0x18 << 2);
+					ret_val =
+					    e1e_wphy_locked(hw,
+							    PHY_REG(776, 20),
+							    data);
+				}
+				hw->phy.ops.release(hw);
+				if (ret_val)
+					return ret_val;
+			}
+		}
+	}
+
+	/* I217 Packet Loss issue:
+	 * ensure that FEXTNVM4 Beacon Duration is set correctly
+	 * on power up.
+	 * Set the Beacon Duration for I217 to 8 usec
+	 */
+	if ((hw->mac.type == e1000_pch_lpt) || (hw->mac.type == e1000_pch_spt)) {
+		u32 mac_reg;
+
+		mac_reg = er32(FEXTNVM4);
+		mac_reg &= ~E1000_FEXTNVM4_BEACON_DURATION_MASK;
+		mac_reg |= E1000_FEXTNVM4_BEACON_DURATION_8USEC;
+		ew32(FEXTNVM4, mac_reg);
 	}
 
 	/* Work-around I218 hang issue */
 	if ((hw->adapter->pdev->device == E1000_DEV_ID_PCH_LPTLP_I218_LM) ||
 	    (hw->adapter->pdev->device == E1000_DEV_ID_PCH_LPTLP_I218_V) ||
 	    (hw->adapter->pdev->device == E1000_DEV_ID_PCH_I218_LM3) ||
-	    (hw->adapter->pdev->device == E1000_DEV_ID_PCH_I218_V3) ||
-	    (hw->mac.type == e1000_pch_spt)) {
+	    (hw->adapter->pdev->device == E1000_DEV_ID_PCH_I218_V3)) {
 		ret_val = e1000_k1_workaround_lpt_lp(hw, link);
 		if (ret_val)
 			return ret_val;

drivers/net/ethernet/intel/e1000e/netdev.c

···
 }
 
 /**
- * e1000e_disable_aspm - Disable ASPM states
+ * __e1000e_disable_aspm - Disable ASPM states
  * @pdev: pointer to PCI device struct
  * @state: bit-mask of ASPM states to disable
+ * @locked: indication if this context holds pci_bus_sem locked.
  *
  * Some devices *must* have certain ASPM states disabled per hardware errata.
  **/
-static void e1000e_disable_aspm(struct pci_dev *pdev, u16 state)
+static void __e1000e_disable_aspm(struct pci_dev *pdev, u16 state, int locked)
 {
 	struct pci_dev *parent = pdev->bus->self;
 	u16 aspm_dis_mask = 0;
···
 		 "L1" : "");
 
 #ifdef CONFIG_PCIEASPM
-	pci_disable_link_state_locked(pdev, state);
+	if (locked)
+		pci_disable_link_state_locked(pdev, state);
+	else
+		pci_disable_link_state(pdev, state);
 
 	/* Double-check ASPM control.  If not disabled by the above, the
 	 * BIOS is preventing that from happening (or CONFIG_PCIEASPM is
···
 					   aspm_dis_mask);
 }
 
+/**
+ * e1000e_disable_aspm - Disable ASPM states.
+ * @pdev: pointer to PCI device struct
+ * @state: bit-mask of ASPM states to disable
+ *
+ * This function acquires the pci_bus_sem!
+ * Some devices *must* have certain ASPM states disabled per hardware errata.
+ **/
+static void e1000e_disable_aspm(struct pci_dev *pdev, u16 state)
+{
+	__e1000e_disable_aspm(pdev, state, 0);
+}
+
+/**
+ * e1000e_disable_aspm_locked   Disable ASPM states.
+ * @pdev: pointer to PCI device struct
+ * @state: bit-mask of ASPM states to disable
+ *
+ * This function must be called with pci_bus_sem acquired!
+ * Some devices *must* have certain ASPM states disabled per hardware errata.
+ **/
+static void e1000e_disable_aspm_locked(struct pci_dev *pdev, u16 state)
+{
+	__e1000e_disable_aspm(pdev, state, 1);
+}
+
 #ifdef CONFIG_PM
 static int __e1000_resume(struct pci_dev *pdev)
 {
···
 	if (adapter->flags2 & FLAG2_DISABLE_ASPM_L1)
 		aspm_disable_flag |= PCIE_LINK_STATE_L1;
 	if (aspm_disable_flag)
-		e1000e_disable_aspm(pdev, aspm_disable_flag);
+		e1000e_disable_aspm_locked(pdev, aspm_disable_flag);
 
 	pci_set_master(pdev);
 

drivers/net/ethernet/intel/i40evf/i40e_txrx.c

···
 	if (!dev)
 		return -ENOMEM;
 
+	/* warn if we are about to overwrite the pointer */
+	WARN_ON(tx_ring->tx_bi);
 	bi_size = sizeof(struct i40e_tx_buffer) * tx_ring->count;
 	tx_ring->tx_bi = kzalloc(bi_size, GFP_KERNEL);
 	if (!tx_ring->tx_bi)
···
 	struct device *dev = rx_ring->dev;
 	int bi_size;
 
+	/* warn if we are about to overwrite the pointer */
+	WARN_ON(rx_ring->rx_bi);
 	bi_size = sizeof(struct i40e_rx_buffer) * rx_ring->count;
 	rx_ring->rx_bi = kzalloc(bi_size, GFP_KERNEL);
 	if (!rx_ring->rx_bi)

drivers/net/ethernet/intel/i40evf/i40evf.h

···
 
 int i40evf_up(struct i40evf_adapter *adapter);
 void i40evf_down(struct i40evf_adapter *adapter);
-void i40evf_reinit_locked(struct i40evf_adapter *adapter);
 void i40evf_reset(struct i40evf_adapter *adapter);
 void i40evf_set_ethtool_ops(struct net_device *netdev);
 void i40evf_update_stats(struct i40evf_adapter *adapter);

drivers/net/ethernet/intel/i40evf/i40evf_ethtool.c

···
 	adapter->tx_desc_count = new_tx_count;
 	adapter->rx_desc_count = new_rx_count;
 
-	if (netif_running(netdev))
-		i40evf_reinit_locked(adapter);
+	if (netif_running(netdev)) {
+		adapter->flags |= I40EVF_FLAG_RESET_NEEDED;
+		schedule_work(&adapter->reset_task);
+	}
 
 	return 0;
 }

drivers/net/ethernet/intel/i40evf/i40evf_main.c

···
 	struct i40evf_adapter *adapter = netdev_priv(netdev);
 
 	adapter->tx_timeout_count++;
-	if (!(adapter->flags & I40EVF_FLAG_RESET_PENDING)) {
+	if (!(adapter->flags & (I40EVF_FLAG_RESET_PENDING |
+				I40EVF_FLAG_RESET_NEEDED))) {
 		adapter->flags |= I40EVF_FLAG_RESET_NEEDED;
 		schedule_work(&adapter->reset_task);
 	}
···
 	for (i = 0; i <= I40E_VFQF_HLUT_MAX_INDEX; i++) {
 		lut = 0;
 		for (j = 0; j < 4; j++) {
-			if (cqueue == adapter->vsi_res->num_queue_pairs)
+			if (cqueue == adapter->num_active_queues)
 				cqueue = 0;
 			lut |= ((cqueue) << (8 * j));
 			cqueue++;
···
 	i40e_flush(hw);
 }
 
-#define I40EVF_RESET_WAIT_MS 100
-#define I40EVF_RESET_WAIT_COUNT 200
+#define I40EVF_RESET_WAIT_MS 10
+#define I40EVF_RESET_WAIT_COUNT 500
 /**
  * i40evf_reset_task - Call-back task to handle hardware reset
  * @work: pointer to work_struct
···
 				&adapter->crit_section))
 		usleep_range(500, 1000);
 
+	i40evf_misc_irq_disable(adapter);
 	if (adapter->flags & I40EVF_FLAG_RESET_NEEDED) {
-		dev_info(&adapter->pdev->dev, "Requesting reset from PF\n");
+		adapter->flags &= ~I40EVF_FLAG_RESET_NEEDED;
+		/* Restart the AQ here. If we have been reset but didn't
+		 * detect it, or if the PF had to reinit, our AQ will be hosed.
+		 */
+		i40evf_shutdown_adminq(hw);
+		i40evf_init_adminq(hw);
 		i40evf_request_reset(adapter);
 	}
+	adapter->flags |= I40EVF_FLAG_RESET_PENDING;
 
 	/* poll until we see the reset actually happen */
 	for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
···
 		if ((rstat_val != I40E_VFR_VFACTIVE) &&
 		    (rstat_val != I40E_VFR_COMPLETED))
 			break;
-		msleep(I40EVF_RESET_WAIT_MS);
+		usleep_range(500, 1000);
 	}
 	if (i == I40EVF_RESET_WAIT_COUNT) {
-		adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
+		dev_info(&adapter->pdev->dev, "Never saw reset\n");
 		goto continue_reset; /* act like the reset happened */
 	}
 
···
 	for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
 		rstat_val = rd32(hw, I40E_VFGEN_RSTAT) &
 			    I40E_VFGEN_RSTAT_VFR_STATE_MASK;
-		if ((rstat_val == I40E_VFR_VFACTIVE) ||
-		    (rstat_val == I40E_VFR_COMPLETED))
+		if (rstat_val == I40E_VFR_VFACTIVE)
 			break;
 		msleep(I40EVF_RESET_WAIT_MS);
 	}
+	/* extra wait to make sure minimum wait is met */
+	msleep(I40EVF_RESET_WAIT_MS);
 	if (i == I40EVF_RESET_WAIT_COUNT) {
 		struct i40evf_mac_filter *f, *ftmp;
 		struct i40evf_vlan_filter *fv, *fvtmp;
···
 
 		if (netif_running(adapter->netdev)) {
 			set_bit(__I40E_DOWN, &adapter->vsi.state);
-			i40evf_irq_disable(adapter);
-			i40evf_napi_disable_all(adapter);
-			netif_tx_disable(netdev);
-			netif_tx_stop_all_queues(netdev);
 			netif_carrier_off(netdev);
+			netif_tx_disable(netdev);
+			i40evf_napi_disable_all(adapter);
+			i40evf_irq_disable(adapter);
 			i40evf_free_traffic_irqs(adapter);
 			i40evf_free_all_tx_resources(adapter);
 			i40evf_free_all_rx_resources(adapter);
···
 			list_del(&f->list);
 			kfree(f);
 		}
+
 		list_for_each_entry_safe(fv, fvtmp, &adapter->vlan_filter_list,
 					 list) {
 			list_del(&fv->list);
···
 		i40evf_shutdown_adminq(hw);
 		adapter->netdev->flags &= ~IFF_UP;
 		clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
+		adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
+		dev_info(&adapter->pdev->dev, "Reset task did not complete, VF disabled\n");
 		return; /* Do not attempt to reinit. It's dead, Jim. */
 	}
 
 continue_reset:
-	adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
-
+	if (netif_running(adapter->netdev)) {
+		netif_carrier_off(netdev);
+		netif_tx_stop_all_queues(netdev);
+		i40evf_napi_disable_all(adapter);
+	}
 	i40evf_irq_disable(adapter);
 
-	if (netif_running(adapter->netdev)) {
-		i40evf_napi_disable_all(adapter);
-		netif_tx_disable(netdev);
-		netif_tx_stop_all_queues(netdev);
-		netif_carrier_off(netdev);
-	}
-
 	adapter->state = __I40EVF_RESETTING;
+	adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
+
+	/* free the Tx/Rx rings and descriptors, might be better to just
+	 * re-use them sometime in the future
+	 */
+	i40evf_free_all_rx_resources(adapter);
+	i40evf_free_all_tx_resources(adapter);
 
 	/* kill and reinit the admin queue */
 	if (i40evf_shutdown_adminq(hw))
···
 	adapter->aq_required = I40EVF_FLAG_AQ_ADD_MAC_FILTER;
 	adapter->aq_required |= I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
 	clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
+	i40evf_misc_irq_enable(adapter);
 
 	mod_timer(&adapter->watchdog_timer, jiffies + 2);
 
···
 			goto reset_err;
 
 		i40evf_irq_enable(adapter, true);
+	} else {
+		adapter->state = __I40EVF_DOWN;
 	}
+
 	return;
 reset_err:
 	dev_err(&adapter->pdev->dev, "failed to allocate resources during reinit\n");
···
 			memset(event.msg_buf, 0, I40EVF_MAX_AQ_BUF_SIZE);
 	} while (pending);
 
+	if ((adapter->flags &
+	     (I40EVF_FLAG_RESET_PENDING | I40EVF_FLAG_RESET_NEEDED)) ||
+	    adapter->state == __I40EVF_RESETTING)
+		goto freedom;
+
 	/* check for error indications */
 	val = rd32(hw, hw->aq.arq.len);
 	oldval = val;
···
 	if (oldval != val)
 		wr32(hw, hw->aq.asq.len, val);
 
+freedom:
 	kfree(event.msg_buf);
 out:
 	/* re-enable Admin queue interrupt cause */
···
 }
 
 /**
- * i40evf_reinit_locked - Software reinit
- * @adapter: board private structure
- *
- * Reinititalizes the ring structures in response to a software configuration
- * change. Roughly the same as close followed by open, but skips releasing
- * and reallocating the interrupts.
- **/
-void i40evf_reinit_locked(struct i40evf_adapter *adapter)
-{
-	struct net_device *netdev = adapter->netdev;
-	int err;
-
-	WARN_ON(in_interrupt());
-
-	i40evf_down(adapter);
-
-	/* allocate transmit descriptors */
-	err = i40evf_setup_all_tx_resources(adapter);
-	if (err)
-		goto err_reinit;
-
-	/* allocate receive descriptors */
-	err = i40evf_setup_all_rx_resources(adapter);
-	if (err)
-		goto err_reinit;
-
-	i40evf_configure(adapter);
-
-	err = i40evf_up_complete(adapter);
-	if (err)
-		goto err_reinit;
-
-	i40evf_irq_enable(adapter, true);
-	return;
-
-err_reinit:
-	dev_err(&adapter->pdev->dev, "failed to allocate resources during reinit\n");
-	i40evf_close(netdev);
-}
-
-/**
  * i40evf_change_mtu - Change the Maximum Transfer Unit
  * @netdev: network interface device structure
  * @new_mtu: new value for maximum frame size
···
 	if ((new_mtu < 68) || (max_frame > I40E_MAX_RXBUFFER))
 		return -EINVAL;
 
-	/* must set new MTU before calling down or up */
 	netdev->mtu = new_mtu;
-	i40evf_reinit_locked(adapter);
+	adapter->flags |= I40EVF_FLAG_RESET_NEEDED;
+	schedule_work(&adapter->reset_task);
+
 	return 0;
 }
 

drivers/net/ethernet/intel/igb/e1000_82575.c

···
 /* Intel(R) Gigabit Ethernet Linux driver
- * Copyright(c) 2007-2014 Intel Corporation.
+ * Copyright(c) 2007-2015 Intel Corporation.
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms and conditions of the GNU General Public License,
···
  *  igb_rx_fifo_flush_82575 - Clean rx fifo after RX enable
  *  @hw: pointer to the HW structure
  *
- *  After rx enable if managability is enabled then there is likely some
- *  bad data at the start of the fifo and possibly in the DMA fifo.  This
+ *  After rx enable if manageability is enabled then there is likely some
+ *  bad data at the start of the fifo and possibly in the DMA fifo. This
  *  function clears the fifos and flushes any packets that came in as rx was
  *  being enabled.
  **/
···
 {
 	u32 rctl, rlpml, rxdctl[4], rfctl, temp_rctl, rx_enabled;
 	int i, ms_wait;
+
+	/* disable IPv6 options as per hardware errata */
+	rfctl = rd32(E1000_RFCTL);
+	rfctl |= E1000_RFCTL_IPV6_EX_DIS;
+	wr32(E1000_RFCTL, rfctl);
 
 	if (hw->mac.type != e1000_82575 ||
 	    !(rd32(E1000_MANC) & E1000_MANC_RCV_TCO_EN))
···
 	 * incoming packets are rejected.  Set enable and wait 2ms so that
 	 * any packet that was coming in as RCTL.EN was set is flushed
 	 */
-	rfctl = rd32(E1000_RFCTL);
 	wr32(E1000_RFCTL, rfctl & ~E1000_RFCTL_LEF);
 
 	rlpml = rd32(E1000_RLPML);

drivers/net/ethernet/intel/igb/e1000_defines.h

···
 #define E1000_RXCSUM_PCSD      0x00002000   /* packet checksum disabled */
 
 /* Header split receive */
-#define E1000_RFCTL_LEF        0x00040000
+#define E1000_RFCTL_IPV6_EX_DIS         0x00010000
+#define E1000_RFCTL_LEF                 0x00040000
 
 /* Collision related configuration parameters */
 #define E1000_COLLISION_THRESHOLD       15

drivers/net/ethernet/intel/igb/igb_main.c

···
 
 #define MAJ 5
 #define MIN 2
-#define BUILD 15
+#define BUILD 18
 #define DRV_VERSION __stringify(MAJ) "." __stringify(MIN) "." \
 __stringify(BUILD) "-k"
 char igb_driver_name[] = "igb";