Sync with Linus - rsync://rsync.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git

CREDITS

···
 S: USA
 
 N: Randy Dunlap
-E: [e-mail]
+E: [e-mail]
 W: http://www.xenotime.net/linux/linux.html
 W: http://www.linux-usb.org
 D: Linux-USB subsystem, USB core/UHCI/printer/storage drivers
 D: x86 SMP, ACPI, bootflag hacking
-S: 12725 SW Millikan Way, Suite 400
-S: Beaverton, Oregon 97005
+S: (ask for current address)
 S: USA
 
 N: Bob Dunlop

arch/i386/pci/fixup.c

···
 #define MAX_PCIEROOT	6
 static int quirk_aspm_offset[MAX_PCIEROOT << 3];
 
-#define GET_INDEX(a, b) (((a - PCI_DEVICE_ID_INTEL_MCH_PA) << 3) + b)
+#define GET_INDEX(a, b) ((((a) - PCI_DEVICE_ID_INTEL_MCH_PA) << 3) + ((b) & 7))
 
 static int quirk_pcie_aspm_read(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *value)
 {

arch/ppc/kernel/setup.c

···
 	strlcpy(saved_command_line, cmd_line, COMMAND_LINE_SIZE);
 	*cmdline_p = cmd_line;
 
+	parse_early_param();
+
 	/* set up the bootmem stuff with available memory */
 	do_init_bootmem();
 	if ( ppc_md.progress ) ppc_md.progress("setup_arch: bootmem", 0x3eab);

drivers/char/raw.c

···
 {
 	struct block_device *bdev = filp->private_data;
 
-	return blkdev_ioctl(bdev->bd_inode, filp, command, arg);
+	return blkdev_ioctl(bdev->bd_inode, NULL, command, arg);
 }
 
 static void bind_device(struct raw_config_request *rq)

drivers/pci/hotplug.c

···
 	if ((buffer_size - length <= 0) || (i >= num_envp))
 		return -ENOMEM;
 
+	envp[i++] = scratch;
+	length += scnprintf (scratch, buffer_size - length,
+			    "MODALIAS=pci:v%08Xd%08Xsv%08Xsd%08Xbc%02Xsc%02Xi%02x\n",
+			    pdev->vendor, pdev->device,
+			    pdev->subsystem_vendor, pdev->subsystem_device,
+			    (u8)(pdev->class >> 16), (u8)(pdev->class >> 8),
+			    (u8)(pdev->class));
+	if ((buffer_size - length <= 0) || (i >= num_envp))
+		return -ENOMEM;
+
 	envp[i] = NULL;
 
 	return 0;
 }
-
-static int pci_visit_bus (struct pci_visit * fn, struct pci_bus_wrapped *wrapped_bus, struct pci_dev_wrapped *wrapped_parent)
-{
-	struct list_head *ln;
-	struct pci_dev *dev;
-	struct pci_dev_wrapped wrapped_dev;
-	int result = 0;
-
-	pr_debug("PCI: Scanning bus %04x:%02x\n", pci_domain_nr(wrapped_bus->bus),
-		wrapped_bus->bus->number);
-
-	if (fn->pre_visit_pci_bus) {
-		result = fn->pre_visit_pci_bus(wrapped_bus, wrapped_parent);
-		if (result)
-			return result;
-	}
-
-	ln = wrapped_bus->bus->devices.next; 
-	while (ln != &wrapped_bus->bus->devices) {
-		dev = pci_dev_b(ln);
-		ln = ln->next;
-
-		memset(&wrapped_dev, 0, sizeof(struct pci_dev_wrapped));
-		wrapped_dev.dev = dev;
-
-		result = pci_visit_dev(fn, &wrapped_dev, wrapped_bus);
-		if (result)
-			return result;
-	}
-
-	if (fn->post_visit_pci_bus)
-		result = fn->post_visit_pci_bus(wrapped_bus, wrapped_parent);
-
-	return result;
-}
-
-static int pci_visit_bridge (struct pci_visit * fn,
-			     struct pci_dev_wrapped *wrapped_dev,
-			     struct pci_bus_wrapped *wrapped_parent)
-{
-	struct pci_bus *bus;
-	struct pci_bus_wrapped wrapped_bus;
-	int result = 0;
-
-	pr_debug("PCI: Scanning bridge %s\n", pci_name(wrapped_dev->dev));
-
-	if (fn->visit_pci_dev) {
-		result = fn->visit_pci_dev(wrapped_dev, wrapped_parent);
-		if (result)
-			return result;
-	}
-
-	bus = wrapped_dev->dev->subordinate;
-	if (bus) {
-		memset(&wrapped_bus, 0, sizeof(struct pci_bus_wrapped));
-		wrapped_bus.bus = bus;
-
-		result = pci_visit_bus(fn, &wrapped_bus, wrapped_dev);
-	}
-	return result;
-}
-
-/**
- * pci_visit_dev - scans the pci buses.
- * @fn: callback functions that are called while visiting
- * @wrapped_dev: the device to scan
- * @wrapped_parent: the bus where @wrapped_dev is connected to
- *
- * Every bus and every function is presented to a custom
- * function that can act upon it.
- */
-int pci_visit_dev(struct pci_visit *fn, struct pci_dev_wrapped *wrapped_dev,
-		  struct pci_bus_wrapped *wrapped_parent)
-{
-	struct pci_dev* dev = wrapped_dev ? wrapped_dev->dev : NULL;
-	int result = 0;
-
-	if (!dev)
-		return 0;
-
-	if (fn->pre_visit_pci_dev) {
-		result = fn->pre_visit_pci_dev(wrapped_dev, wrapped_parent);
-		if (result)
-			return result;
-	}
-
-	switch (dev->class >> 8) {
-		case PCI_CLASS_BRIDGE_PCI:
-			result = pci_visit_bridge(fn, wrapped_dev,
-						  wrapped_parent);
-			if (result)
-				return result;
-			break;
-		default:
-			pr_debug("PCI: Scanning device %s\n", pci_name(dev));
-			if (fn->visit_pci_dev) {
-				result = fn->visit_pci_dev (wrapped_dev,
-							    wrapped_parent);
-				if (result)
-					return result;
-			}
-	}
-
-	if (fn->post_visit_pci_dev)
-		result = fn->post_visit_pci_dev(wrapped_dev, wrapped_parent);
-
-	return result;
-}
-EXPORT_SYMBOL(pci_visit_dev);

drivers/pci/hotplug/cpci_hotplug.h

···
 #include <linux/types.h>
 #include <linux/pci.h>
 
-/* PICMG 2.12 R2.0 HS CSR bits: */
+/* PICMG 2.1 R2.0 HS CSR bits: */
 #define HS_CSR_INS	0x0080
 #define HS_CSR_EXT	0x0040
 #define HS_CSR_PI	0x0030

drivers/pci/hotplug/cpci_hotplug_core.c

···
 #include <linux/init.h>
 #include <linux/interrupt.h>
 #include <linux/smp_lock.h>
+#include <asm/atomic.h>
 #include <linux/delay.h>
 #include "pci_hotplug.h"
 #include "cpci_hotplug.h"
 
-#define DRIVER_VERSION	"0.2"
 #define DRIVER_AUTHOR	"Scott Murray <[e-mail]>"
 #define DRIVER_DESC	"CompactPCI Hot Plug Core"
 
···
 #define warn(format, arg...) printk(KERN_WARNING "%s: " format "\n", MY_NAME , ## arg)
 
 /* local variables */
-static spinlock_t list_lock;
+static DECLARE_RWSEM(list_rwsem);
 static LIST_HEAD(slot_list);
 static int slots;
+static atomic_t extracting;
 int cpci_debug;
 static struct cpci_hp_controller *controller;
 static struct semaphore event_semaphore;	/* mutex for process loop (up if something to process) */
···
 static int set_attention_status(struct hotplug_slot *slot, u8 value);
 static int get_power_status(struct hotplug_slot *slot, u8 * value);
 static int get_attention_status(struct hotplug_slot *slot, u8 * value);
+static int get_adapter_status(struct hotplug_slot *slot, u8 * value);
+static int get_latch_status(struct hotplug_slot *slot, u8 * value);
 
 static struct hotplug_slot_ops cpci_hotplug_slot_ops = {
 	.owner = THIS_MODULE,
···
 	.set_attention_status = set_attention_status,
 	.get_power_status = get_power_status,
 	.get_attention_status = get_attention_status,
+	.get_adapter_status = get_adapter_status,
+	.get_latch_status = get_latch_status,
 };
 
 static int
···
 		warn("failure to update adapter file");
 	}
 
-	slot->extracting = 0;
-
+	if(slot->extracting) {
+		slot->extracting = 0;
+		atomic_dec(&extracting);
+	}
 	return retval;
 }
 
···
 set_attention_status(struct hotplug_slot *hotplug_slot, u8 status)
 {
 	return cpci_set_attention_status(hotplug_slot->private, status);
+}
+
+static int
+get_adapter_status(struct hotplug_slot *hotplug_slot, u8 * value)
+{
+	*value = hotplug_slot->info->adapter_status;
+	return 0;
+}
+
+static int
+get_latch_status(struct hotplug_slot *hotplug_slot, u8 * value)
+{
+	*value = hotplug_slot->info->latch_status;
+	return 0;
 }
 
 static void release_slot(struct hotplug_slot *hotplug_slot)
···
 		}
 
 		/* Add slot to our internal list */
-		spin_lock(&list_lock);
+		down_write(&list_rwsem);
 		list_add(&slot->slot_list, &slot_list);
 		slots++;
-		spin_unlock(&list_lock);
+		up_write(&list_rwsem);
 	}
 	return 0;
 error_name:
···
 	struct list_head *next;
 	int status;
 
-	spin_lock(&list_lock);
+	down_write(&list_rwsem);
 	if(!slots) {
-		spin_unlock(&list_lock);
+		up_write(&list_rwsem);
 		return -1;
 	}
 	list_for_each_safe(tmp, next, &slot_list) {
···
 			slots--;
 		}
 	}
-	spin_unlock(&list_lock);
+	up_write(&list_rwsem);
 	return 0;
 }
 
···
 }
 
 /*
- * According to PICMG 2.12 R2.0, section 6.3.2, upon
+ * According to PICMG 2.1 R2.0, section 6.3.2, upon
  * initialization, the system driver shall clear the
  * INS bits of the cold-inserted devices.
  */
···
 	struct pci_dev* dev;
 
 	dbg("%s - enter", __FUNCTION__);
-	spin_lock(&list_lock);
+	down_read(&list_rwsem);
 	if(!slots) {
-		spin_unlock(&list_lock);
+		up_read(&list_rwsem);
 		return -1;
 	}
 	list_for_each(tmp, &slot_list) {
···
 			}
 		}
 	}
-	spin_unlock(&list_lock);
+	up_read(&list_rwsem);
 	dbg("%s - exit", __FUNCTION__);
 	return 0;
 }
···
 	struct list_head *tmp;
 	int extracted;
 	int inserted;
+	u16 hs_csr;
 
-	spin_lock(&list_lock);
+	down_read(&list_rwsem);
 	if(!slots) {
-		spin_unlock(&list_lock);
+		up_read(&list_rwsem);
 		err("no slots registered, shutting down");
 		return -1;
 	}
···
 		dbg("%s - looking at slot %s",
 		    __FUNCTION__, slot->hotplug_slot->name);
 		if(cpci_check_and_clear_ins(slot)) {
-			u16 hs_csr;
-
 			/* Some broken hardware (e.g. PLX 9054AB) asserts ENUM# twice... */
 			if(slot->dev) {
 				warn("slot %s already inserted", slot->hotplug_slot->name);
···
 
 			inserted++;
 		} else if(cpci_check_ext(slot)) {
-			u16 hs_csr;
-
 			/* Process extraction request */
 			dbg("%s - slot %s extracted",
 			    __FUNCTION__, slot->hotplug_slot->name);
···
 			if(!slot->extracting) {
 				if(update_latch_status(slot->hotplug_slot, 0)) {
 					warn("failure to update latch file");
+
 				}
+				atomic_inc(&extracting);
 				slot->extracting = 1;
 			}
 			extracted++;
+		} else if(slot->extracting) {
+			hs_csr = cpci_get_hs_csr(slot);
+			if(hs_csr == 0xffff) {
+				/*
+				 * Hmmm, we're likely hosed at this point, should we
+				 * bother trying to tell the driver or not?
+				 */
+				err("card in slot %s was improperly removed",
+				    slot->hotplug_slot->name);
+				if(update_adapter_status(slot->hotplug_slot, 0)) {
+					warn("failure to update adapter file");
+				}
+				slot->extracting = 0;
+				atomic_dec(&extracting);
+			}
 		}
 	}
-	spin_unlock(&list_lock);
+	up_read(&list_rwsem);
+	dbg("inserted=%d, extracted=%d, extracting=%d",
+	    inserted, extracted, atomic_read(&extracting));
 	if(inserted || extracted) {
 		return extracted;
 	}
-	else {
+	else if(!atomic_read(&extracting)) {
 		err("cannot find ENUM# source, shutting down");
 		return -1;
 	}
+	return 0;
 }
 
 /* This is the interrupt mode worker thread body */
···
 event_thread(void *data)
 {
 	int rc;
-	struct slot *slot;
-	struct list_head *tmp;
 
 	lock_kernel();
 	daemonize("cpci_hp_eventd");
···
 		    thread_finished);
 		if(thread_finished || signal_pending(current))
 			break;
-		while(controller->ops->query_enum()) {
+		do {
 			rc = check_slots();
-			if (rc > 0)
+			if (rc > 0) {
 				/* Give userspace a chance to handle extraction */
 				msleep(500);
-			else if (rc < 0) {
+			} else if (rc < 0) {
 				dbg("%s - error checking slots", __FUNCTION__);
 				thread_finished = 1;
 				break;
 			}
-		}
-		/* Check for someone yanking out a board */
-		list_for_each(tmp, &slot_list) {
-			slot = list_entry(tmp, struct slot, slot_list);
-			if(slot->extracting) {
-				/*
-				 * Hmmm, we're likely hosed at this point, should we
-				 * bother trying to tell the driver or not?
-				 */
-				err("card in slot %s was improperly removed",
-				    slot->hotplug_slot->name);
-				if(update_adapter_status(slot->hotplug_slot, 0)) {
-					warn("failure to update adapter file");
-				}
-				slot->extracting = 0;
-			}
-		}
+		} while(atomic_read(&extracting) != 0);
 
 		/* Re-enable ENUM# interrupt */
 		dbg("%s - re-enabling irq", __FUNCTION__);
 		controller->ops->enable_irq();
 	}
-
 	dbg("%s - event thread signals exit", __FUNCTION__);
 	up(&thread_exit);
 	return 0;
···
 poll_thread(void *data)
 {
 	int rc;
-	struct slot *slot;
-	struct list_head *tmp;
 
 	lock_kernel();
 	daemonize("cpci_hp_polld");
···
 	while(1) {
 		if(thread_finished || signal_pending(current))
 			break;
-
-		while(controller->ops->query_enum()) {
-			rc = check_slots();
-			if(rc > 0)
-				/* Give userspace a chance to handle extraction */
-				msleep(500);
-			else if (rc < 0) {
-				dbg("%s - error checking slots", __FUNCTION__);
-				thread_finished = 1;
-				break;
-			}
-		}
-		/* Check for someone yanking out a board */
-		list_for_each(tmp, &slot_list) {
-			slot = list_entry(tmp, struct slot, slot_list);
-			if(slot->extracting) {
-				/*
-				 * Hmmm, we're likely hosed at this point, should we
-				 * bother trying to tell the driver or not?
-				 */
-				err("card in slot %s was improperly removed",
-				    slot->hotplug_slot->name);
-				if(update_adapter_status(slot->hotplug_slot, 0)) {
-					warn("failure to update adapter file");
+		if(controller->ops->query_enum()) {
+			do {
+				rc = check_slots();
+				if(rc > 0) {
+					/* Give userspace a chance to handle extraction */
+					msleep(500);
+				} else if(rc < 0) {
+					dbg("%s - error checking slots", __FUNCTION__);
+					thread_finished = 1;
+					break;
 				}
-				slot->extracting = 0;
-			}
+			} while(atomic_read(&extracting) != 0);
 		}
-
 		msleep(100);
 	}
 	dbg("poll thread signals exit");
···
 	int status = 0;
 
 	if(controller) {
+		if(atomic_read(&extracting) != 0) {
+			return -EBUSY;
+		}
 		if(!thread_finished) {
 			cpci_stop_thread();
 		}
···
 		return -ENODEV;
 	}
 
-	spin_lock(&list_lock);
-	if(!slots) {
-		spin_unlock(&list_lock);
+	down_read(&list_rwsem);
+	if(list_empty(&slot_list)) {
+		up_read(&list_rwsem);
 		return -ENODEV;
 	}
-	spin_unlock(&list_lock);
+	up_read(&list_rwsem);
 
 	if(first) {
 		status = init_slots();
···
 	if(!controller) {
 		return -ENODEV;
 	}
-
+	if(atomic_read(&extracting) != 0) {
+		return -EBUSY;
+	}
 	if(controller->irq) {
 		/* Stop enum interrupt processing */
 		dbg("%s - disabling irq", __FUNCTION__);
···
 	 * Unregister all of our slots with the pci_hotplug subsystem,
 	 * and free up all memory that we had allocated.
 	 */
-	spin_lock(&list_lock);
+	down_write(&list_rwsem);
 	if(!slots) {
 		goto null_cleanup;
 	}
···
 		kfree(slot);
 	}
       null_cleanup:
-	spin_unlock(&list_lock);
+	up_write(&list_rwsem);
 	return;
 }
 
 int __init
 cpci_hotplug_init(int debug)
 {
-	spin_lock_init(&list_lock);
 	cpci_debug = debug;
-
-	info(DRIVER_DESC " version: " DRIVER_VERSION);
 	return 0;
 }
 

drivers/pci/hotplug/cpci_hotplug_pci.c

···
 #include "pci_hotplug.h"
 #include "cpci_hotplug.h"
 
-#if !defined(MODULE)
 #define MY_NAME	"cpci_hotplug"
-#else
-#define MY_NAME	THIS_MODULE->name
-#endif
 
 extern int cpci_debug;
 
···
 	}
 	return hs_csr;
 }
-
-#if 0
-u16 cpci_set_hs_csr(struct slot* slot, u16 hs_csr)
-{
-	int hs_cap;
-	u16 new_hs_csr;
-
-	hs_cap = pci_bus_find_capability(slot->bus,
-					 slot->devfn,
-					 PCI_CAP_ID_CHSWP);
-	if(!hs_cap) {
-		return 0xFFFF;
-	}
-
-	/* Write out the new value */
-	if(pci_bus_write_config_word(slot->bus,
-				      slot->devfn,
-				      hs_cap + 2,
-				      hs_csr)) {
-		return 0xFFFF;
-	}
-
-	/* Read back what we just wrote out */
-	if(pci_bus_read_config_word(slot->bus,
-				     slot->devfn,
-				     hs_cap + 2,
-				     &new_hs_csr)) {
-		return 0xFFFF;
-	}
-	return new_hs_csr;
-}
-#endif
 
 int cpci_check_and_clear_ins(struct slot* slot)
 {
···
 		return -ENODEV;
 	}
 	if((hs_csr & HS_CSR_LOO) != HS_CSR_LOO) {
-		/* Set LOO */
 		hs_csr |= HS_CSR_LOO;
 		if(pci_bus_write_config_word(slot->bus,
 					      slot->devfn,
···
 		return -ENODEV;
 	}
 	if(hs_csr & HS_CSR_LOO) {
-		/* Clear LOO */
 		hs_csr &= ~HS_CSR_LOO;
 		if(pci_bus_write_config_word(slot->bus,
 					      slot->devfn,
···
  * Device configuration functions
  */
 
-static int cpci_configure_dev(struct pci_bus *bus, struct pci_dev *dev)
+static void cpci_enable_device(struct pci_dev *dev)
 {
-	u8 irq_pin;
-	int r;
+	struct pci_bus *bus;
 
-	dbg("%s - enter", __FUNCTION__);
-
-	/* NOTE: device already setup from prior scan */
-
-	/* FIXME: How would we know if we need to enable the expansion ROM? */
-	pci_write_config_word(dev, PCI_ROM_ADDRESS, 0x00L);
-
-	/* Assign resources */
-	dbg("assigning resources for %02x:%02x.%x",
-	    dev->bus->number, PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn));
-	for (r = 0; r < 6; r++) {
-		struct resource *res = dev->resource + r;
-		if(res->flags)
-			pci_assign_resource(dev, r);
-	}
-	dbg("finished assigning resources for %02x:%02x.%x",
-	    dev->bus->number, PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn));
-
-	/* Does this function have an interrupt at all? */
-	dbg("checking for function interrupt");
-	pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &irq_pin);
-	if(irq_pin) {
-		dbg("function uses interrupt pin %d", irq_pin);
-	}
-
-	/*
-	 * Need to explicitly set irq field to 0 so that it'll get assigned
-	 * by the pcibios platform dependent code called by pci_enable_device.
-	 */
-	dev->irq = 0;
-
-	dbg("enabling device");
-	pci_enable_device(dev);	/* XXX check return */
-	dbg("now dev->irq = %d", dev->irq);
-	if(irq_pin && dev->irq) {
-		pci_write_config_byte(dev, PCI_INTERRUPT_LINE, dev->irq);
-	}
-
-	/* Can't use pci_insert_device at the moment, do it manually for now */
-	pci_proc_attach_device(dev);
-	dbg("notifying drivers");
-	//pci_announce_device_to_drivers(dev);
-	dbg("%s - exit", __FUNCTION__);
-	return 0;
-}
-
-static int cpci_configure_bridge(struct pci_bus* bus, struct pci_dev* dev)
-{
-	int rc;
-	struct pci_bus* child;
-	struct resource* r;
-	u8 max, n;
-	u16 command;
-
-	dbg("%s - enter", __FUNCTION__);
-
-	/* Do basic bridge initialization */
-	rc = pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0x40);
-	if(rc) {
-		printk(KERN_ERR "%s - write of PCI_LATENCY_TIMER failed\n", __FUNCTION__);
-	}
-	rc = pci_write_config_byte(dev, PCI_SEC_LATENCY_TIMER, 0x40);
-	if(rc) {
-		printk(KERN_ERR "%s - write of PCI_SEC_LATENCY_TIMER failed\n", __FUNCTION__);
-	}
-	rc = pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, L1_CACHE_BYTES / 4);
-	if(rc) {
-		printk(KERN_ERR "%s - write of PCI_CACHE_LINE_SIZE failed\n", __FUNCTION__);
-	}
-
-	/*
-	 * Set parent bridge's subordinate field so that configuration space
-	 * access will work in pci_scan_bridge and friends.
-	 */
-	max = pci_max_busnr();
-	bus->subordinate = max + 1;
-	pci_write_config_byte(bus->self, PCI_SUBORDINATE_BUS, max + 1);
-
-	/* Scan behind bridge */
-	n = pci_scan_bridge(bus, dev, max, 2);
-	child = pci_find_bus(0, max + 1);
-	if (!child)
-		return -ENODEV;
-	pci_proc_attach_bus(child);
-
-	/*
-	 * Update parent bridge's subordinate field if there were more bridges
-	 * behind the bridge that was scanned.
-	 */
-	if(n > max) {
-		bus->subordinate = n;
-		pci_write_config_byte(bus->self, PCI_SUBORDINATE_BUS, n);
-	}
-
-	/*
-	 * Update the bridge resources of the bridge to accommodate devices
-	 * behind it.
-	 */
-	pci_bus_size_bridges(child);
-	pci_bus_assign_resources(child);
-
-	/* Enable resource mapping via command register */
-	command = PCI_COMMAND_MASTER | PCI_COMMAND_INVALIDATE | PCI_COMMAND_PARITY | PCI_COMMAND_SERR;
-	r = child->resource[0];
-	if(r && r->start) {
-		command |= PCI_COMMAND_IO;
-	}
-	r = child->resource[1];
-	if(r && r->start) {
-		command |= PCI_COMMAND_MEMORY;
-	}
-	r = child->resource[2];
-	if(r && r->start) {
-		command |= PCI_COMMAND_MEMORY;
-	}
-	rc = pci_write_config_word(dev, PCI_COMMAND, command);
-	if(rc) {
-		err("Error setting command register");
-		return rc;
-	}
-
-	/* Set bridge control register */
-	command = PCI_BRIDGE_CTL_PARITY | PCI_BRIDGE_CTL_SERR | PCI_BRIDGE_CTL_NO_ISA;
-	rc = pci_write_config_word(dev, PCI_BRIDGE_CONTROL, command);
-	if(rc) {
-		err("Error setting bridge control register");
-		return rc;
-	}
-	dbg("%s - exit", __FUNCTION__);
-	return 0;
-}
-
-static int configure_visit_pci_dev(struct pci_dev_wrapped *wrapped_dev,
-				   struct pci_bus_wrapped *wrapped_bus)
-{
-	int rc;
-	struct pci_dev *dev = wrapped_dev->dev;
-	struct pci_bus *bus = wrapped_bus->bus;
-	struct slot* slot;
-
-	dbg("%s - enter", __FUNCTION__);
-
-	/*
-	 * We need to fix up the hotplug representation with the Linux
-	 * representation.
-	 */
-	if(wrapped_dev->data) {
-		slot = (struct slot*) wrapped_dev->data;
-		slot->dev = dev;
-	}
-
-	/* If it's a bridge, scan behind it for devices */
+	pci_enable_device(dev);
 	if(dev->hdr_type == PCI_HEADER_TYPE_BRIDGE) {
-		rc = cpci_configure_bridge(bus, dev);
-		if(rc)
-			return rc;
-	}
-
-	/* Actually configure device */
-	if(dev) {
-		rc = cpci_configure_dev(bus, dev);
-		if(rc)
-			return rc;
-	}
-	dbg("%s - exit", __FUNCTION__);
-	return 0;
-}
-
-static int unconfigure_visit_pci_dev_phase2(struct pci_dev_wrapped *wrapped_dev,
-					    struct pci_bus_wrapped *wrapped_bus)
-{
-	struct pci_dev *dev = wrapped_dev->dev;
-	struct slot* slot;
-
-	dbg("%s - enter", __FUNCTION__);
-	if(!dev)
-		return -ENODEV;
-
-	/* Remove the Linux representation */
-	if(pci_remove_device_safe(dev)) {
-		err("Could not remove device\n");
-		return -1;
-	}
-
-	/*
-	 * Now remove the hotplug representation.
-	 */
-	if(wrapped_dev->data) {
-		slot = (struct slot*) wrapped_dev->data;
-		slot->dev = NULL;
-	} else {
-		dbg("No hotplug representation for %02x:%02x.%x",
-		    dev->bus->number, PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn));
-	}
-	dbg("%s - exit", __FUNCTION__);
-	return 0;
-}
-
-static int unconfigure_visit_pci_bus_phase2(struct pci_bus_wrapped *wrapped_bus,
-					    struct pci_dev_wrapped *wrapped_dev)
-{
-	struct pci_bus *bus = wrapped_bus->bus;
-	struct pci_bus *parent = bus->self->bus;
-
-	dbg("%s - enter", __FUNCTION__);
-
-	/* The cleanup code for proc entries regarding buses should be in the kernel... */
-	if(bus->procdir)
-		dbg("detach_pci_bus %s", bus->procdir->name);
-	pci_proc_detach_bus(bus);
-
-	/* The cleanup code should live in the kernel... */
-	bus->self->subordinate = NULL;
-
-	/* unlink from parent bus */
-	list_del(&bus->node);
-
-	/* Now, remove */
-	if(bus)
-		kfree(bus);
-
-	/* Update parent's subordinate field */
-	if(parent) {
-		u8 n = pci_bus_max_busnr(parent);
-		if(n < parent->subordinate) {
-			parent->subordinate = n;
-			pci_write_config_byte(parent->self, PCI_SUBORDINATE_BUS, n);
+		bus = dev->subordinate;
+		list_for_each_entry(dev, &bus->devices, bus_list) {
+			cpci_enable_device(dev);
 		}
 	}
-	dbg("%s - exit", __FUNCTION__);
-	return 0;
 }
-
-static struct pci_visit configure_functions = {
-	.visit_pci_dev = configure_visit_pci_dev,
-};
-
-static struct pci_visit unconfigure_functions_phase2 = {
-	.post_visit_pci_bus = unconfigure_visit_pci_bus_phase2,
-	.post_visit_pci_dev = unconfigure_visit_pci_dev_phase2
-};
-
 
 int cpci_configure_slot(struct slot* slot)
 {
-	int rc = 0;
+	unsigned char busnr;
+	struct pci_bus *child;
 
 	dbg("%s - enter", __FUNCTION__);
 
···
 		slot->dev = pci_find_slot(slot->bus->number, slot->devfn);
 		if(slot->dev == NULL) {
 			err("Could not find PCI device for slot %02x", slot->number);
-			return 0;
-		}
-	}
-	dbg("slot->dev = %p", slot->dev);
-	if(slot->dev) {
-		struct pci_dev *dev;
-		struct pci_dev_wrapped wrapped_dev;
-		struct pci_bus_wrapped wrapped_bus;
-		int i;
-
-		memset(&wrapped_dev, 0, sizeof (struct pci_dev_wrapped));
-		memset(&wrapped_bus, 0, sizeof (struct pci_bus_wrapped));
-
-		for (i = 0; i < 8; i++) {
-			dev = pci_find_slot(slot->bus->number,
-					    PCI_DEVFN(PCI_SLOT(slot->dev->devfn), i));
-			if(!dev)
-				continue;
-			wrapped_dev.dev = dev;
-			wrapped_bus.bus = slot->dev->bus;
-			if(i)
-				wrapped_dev.data = NULL;
-			else
-				wrapped_dev.data = (void*) slot;
-			rc = pci_visit_dev(&configure_functions, &wrapped_dev, &wrapped_bus);
+			return 1;
 		}
 	}
 
-	dbg("%s - exit, rc = %d", __FUNCTION__, rc);
-	return rc;
+	if (slot->dev->hdr_type == PCI_HEADER_TYPE_BRIDGE) {
+		pci_read_config_byte(slot->dev, PCI_SECONDARY_BUS, &busnr);
+		child = pci_add_new_bus(slot->dev->bus, slot->dev, busnr);
+		pci_do_scan_bus(child);
+		pci_bus_size_bridges(child);
+	}
+
+	pci_bus_assign_resources(slot->dev->bus);
+
+	cpci_enable_device(slot->dev);
+
+	dbg("%s - exit", __FUNCTION__);
+	return 0;
 }
 
 int cpci_unconfigure_slot(struct slot* slot)
 {
-	int rc = 0;
 	int i;
-	struct pci_dev_wrapped wrapped_dev;
-	struct pci_bus_wrapped wrapped_bus;
 	struct pci_dev *dev;
 
 	dbg("%s - enter", __FUNCTION__);
-
 	if(!slot->dev) {
 		err("No device for slot %02x\n", slot->number);
 		return -ENODEV;
 	}
 
-	memset(&wrapped_dev, 0, sizeof (struct pci_dev_wrapped));
-	memset(&wrapped_bus, 0, sizeof (struct pci_bus_wrapped));
-
 	for (i = 0; i < 8; i++) {
 		dev = pci_find_slot(slot->bus->number,
 				    PCI_DEVFN(PCI_SLOT(slot->devfn), i));
 		if(dev) {
-			wrapped_dev.dev = dev;
-			wrapped_bus.bus = dev->bus;
- 			if(i)
- 				wrapped_dev.data = NULL;
- 			else
- 				wrapped_dev.data = (void*) slot;
-			dbg("%s - unconfigure phase 2", __FUNCTION__);
-			rc = pci_visit_dev(&unconfigure_functions_phase2,
-					   &wrapped_dev,
-					   &wrapped_bus);
-			if(rc)
-				break;
+			pci_remove_bus_device(dev);
+			slot->dev = NULL;
 		}
 	}
-	dbg("%s - exit, rc = %d", __FUNCTION__, rc);
-	return rc;
+	dbg("%s - exit", __FUNCTION__);
+	return 0;
 }

drivers/pci/hotplug/pciehp.h

···
 	u8 slot_bus;		/* Bus where the slots handled by this controller sit */
 	u8 ctrlcap;
 	u16 vendor_id;
+	u8 cap_base;
 };
 
 struct irq_mapping {

drivers/pci/hotplug/pciehp_core.c

···
 static struct pcie_port_service_id port_pci_ids[] = { { 
 	.vendor = PCI_ANY_ID, 
 	.device = PCI_ANY_ID,
-	.port_type = PCIE_RC_PORT, 
+	.port_type = PCIE_ANY_PORT,
 	.service_type = PCIE_PORT_SERVICE_HP,
 	.driver_data =	0, 
 	}, { /* end: all zeroes */ }

drivers/pci/hotplug/pciehp_hpc.c

···
 };
 static int pcie_cap_base = 0;		/* Base of the PCI Express capability item structure */ 
 
-#define PCIE_CAP_ID	( pcie_cap_base + PCIECAPID )
-#define NXT_CAP_PTR	( pcie_cap_base + NXTCAPPTR )
-#define CAP_REG		( pcie_cap_base + CAPREG )
-#define DEV_CAP		( pcie_cap_base + DEVCAP )
-#define DEV_CTRL	( pcie_cap_base + DEVCTRL )
-#define DEV_STATUS	( pcie_cap_base + DEVSTATUS )
-#define LNK_CAP		( pcie_cap_base + LNKCAP )
-#define LNK_CTRL	( pcie_cap_base + LNKCTRL )
-#define LNK_STATUS	( pcie_cap_base + LNKSTATUS )
-#define SLOT_CAP	( pcie_cap_base + SLOTCAP )
-#define SLOT_CTRL	( pcie_cap_base + SLOTCTRL )
-#define SLOT_STATUS	( pcie_cap_base + SLOTSTATUS )
-#define ROOT_CTRL	( pcie_cap_base + ROOTCTRL )
-#define ROOT_STATUS	( pcie_cap_base + ROOTSTATUS )
+#define PCIE_CAP_ID(cb)	( cb + PCIECAPID )
+#define NXT_CAP_PTR(cb)	( cb + NXTCAPPTR )
+#define CAP_REG(cb)	( cb + CAPREG )
+#define DEV_CAP(cb)	( cb + DEVCAP )
+#define DEV_CTRL(cb)	( cb + DEVCTRL )
+#define DEV_STATUS(cb)	( cb + DEVSTATUS )
+#define LNK_CAP(cb)	( cb + LNKCAP )
+#define LNK_CTRL(cb)	( cb + LNKCTRL )
+#define LNK_STATUS(cb)	( cb + LNKSTATUS )
+#define SLOT_CAP(cb)	( cb + SLOTCAP )
+#define SLOT_CTRL(cb)	( cb + SLOTCTRL )
+#define SLOT_STATUS(cb)	( cb + SLOTSTATUS )
+#define ROOT_CTRL(cb)	( cb + ROOTCTRL )
+#define ROOT_STATUS(cb)	( cb + ROOTSTATUS )
 
 #define hp_register_read_word(pdev, reg , value)		\
 	pci_read_config_word(pdev, reg, &value)
···
 		return -1;
 	}
 
-	retval = hp_register_read_word(php_ctlr->pci_dev, SLOT_STATUS, slot_status);
+	retval = hp_register_read_word(php_ctlr->pci_dev, SLOT_STATUS(slot->ctrl->cap_base), slot_status);
 	if (retval) {
 			err("%s : hp_register_read_word SLOT_STATUS failed\n", __FUNCTION__);
 			return retval;
···
 	}
 
 	dbg("%s: Before hp_register_write_word SLOT_CTRL %x\n", __FUNCTION__, cmd);
-	retval = hp_register_write_word(php_ctlr->pci_dev, SLOT_CTRL, cmd | CMD_CMPL_INTR_ENABLE);
+	retval = hp_register_write_word(php_ctlr->pci_dev, SLOT_CTRL(slot->ctrl->cap_base), cmd | CMD_CMPL_INTR_ENABLE);
 	if (retval) {
 		err("%s : hp_register_write_word SLOT_CTRL failed\n", __FUNCTION__);
 		return retval;
···
 		return -1;
 	}
 	
-	retval = hp_register_read_word(php_ctlr->pci_dev, LNK_STATUS, lnk_status);
+	retval = hp_register_read_word(php_ctlr->pci_dev, LNK_STATUS(ctrl->cap_base), lnk_status);
 
 	if (retval) {
 		err("%s : hp_register_read_word LNK_STATUS failed\n", __FUNCTION__);
···
 		return -1;
 	}
 
-	retval = hp_register_read_word(php_ctlr->pci_dev, SLOT_CTRL, slot_ctrl);
+	retval = hp_register_read_word(php_ctlr->pci_dev, SLOT_CTRL(slot->ctrl->cap_base), slot_ctrl);
 
 	if (retval) {
 		err("%s : hp_register_read_word SLOT_CTRL failed\n", __FUNCTION__);
 		return retval;
 	}
 
-	dbg("%s: SLOT_CTRL %x, value read %x\n", __FUNCTION__,SLOT_CTRL, slot_ctrl);
+	dbg("%s: SLOT_CTRL %x, value read %x\n", __FUNCTION__,SLOT_CTRL(slot->ctrl->cap_base), slot_ctrl);
 
 	atten_led_state = (slot_ctrl & ATTN_LED_CTRL) >> 6;
 
···
 		return -1;
 	}
 
-	retval = hp_register_read_word(php_ctlr->pci_dev, SLOT_CTRL, slot_ctrl);
+	retval = hp_register_read_word(php_ctlr->pci_dev, SLOT_CTRL(slot->ctrl->cap_base), slot_ctrl);
 
 	if (retval) {
 		err("%s : hp_register_read_word SLOT_CTRL failed\n", __FUNCTION__);
 		return retval;
 	}
-	dbg("%s: SLOT_CTRL %x value read %x\n", __FUNCTION__, SLOT_CTRL, slot_ctrl);
+	dbg("%s: SLOT_CTRL %x value read %x\n", __FUNCTION__, SLOT_CTRL(slot->ctrl->cap_base), slot_ctrl);
 
 	pwr_state = (slot_ctrl & PWR_CTRL) >> 10;
 
···
 		return -1;
 	}
 
-	retval = hp_register_read_word(php_ctlr->pci_dev, SLOT_STATUS, slot_status);
+	retval = hp_register_read_word(php_ctlr->pci_dev, SLOT_STATUS(slot->ctrl->cap_base), slot_status);
 
 	if (retval) {
 		err("%s : hp_register_read_word SLOT_STATUS failed\n", __FUNCTION__);
···
 		return -1;
 	}
 
-	retval = hp_register_read_word(php_ctlr->pci_dev, SLOT_STATUS, slot_status);
+	retval = hp_register_read_word(php_ctlr->pci_dev, SLOT_STATUS(slot->ctrl->cap_base), slot_status);
 
 	if (retval) {
 		err("%s : hp_register_read_word SLOT_STATUS failed\n", __FUNCTION__);
···
 		return -1;
 	}
 
-	retval = hp_register_read_word(php_ctlr->pci_dev, SLOT_STATUS, slot_status);
+	retval = hp_register_read_word(php_ctlr->pci_dev, SLOT_STATUS(slot->ctrl->cap_base), slot_status);
 
 	if (retval) {
 		err("%s : hp_register_read_word SLOT_STATUS failed\n", __FUNCTION__);
···
 		err("%s: Invalid HPC slot number!\n", __FUNCTION__);
 		return -1;
 	}
-	rc = hp_register_read_word(php_ctlr->pci_dev, SLOT_CTRL, slot_ctrl);
+	rc = hp_register_read_word(php_ctlr->pci_dev, SLOT_CTRL(slot->ctrl->cap_base), slot_ctrl);
 
 	if (rc) {
 		err("%s : hp_register_read_word SLOT_CTRL failed\n", __FUNCTION__);
···
 		slot_cmd = slot_cmd | HP_INTR_ENABLE; 
 
 	pcie_write_cmd(slot, slot_cmd);
-	dbg("%s: SLOT_CTRL %x write cmd %x\n", __FUNCTION__, SLOT_CTRL, slot_cmd);
+	dbg("%s: SLOT_CTRL %x write cmd %x\n", __FUNCTION__, SLOT_CTRL(slot->ctrl->cap_base), slot_cmd);
 	
 	return rc;
 }
···
 		return ;
 	}
 
-	rc = hp_register_read_word(php_ctlr->pci_dev, SLOT_CTRL, slot_ctrl);
+	rc = hp_register_read_word(php_ctlr->pci_dev, SLOT_CTRL(slot->ctrl->cap_base), slot_ctrl);
 
 	if (rc) {
 		err("%s : hp_register_read_word SLOT_CTRL failed\n", __FUNCTION__);
···
 
 	pcie_write_cmd(slot, slot_cmd);
 
-	dbg("%s: SLOT_CTRL %x write cmd %x\n",__FUNCTION__, SLOT_CTRL, slot_cmd);
+	dbg("%s: SLOT_CTRL %x write cmd %x\n",__FUNCTION__, SLOT_CTRL(slot->ctrl->cap_base), slot_cmd);
 	return;
 }
 
···
 		return ;
 	}
 
-	rc = hp_register_read_word(php_ctlr->pci_dev, SLOT_CTRL, slot_ctrl);
+	rc = hp_register_read_word(php_ctlr->pci_dev, SLOT_CTRL(slot->ctrl->cap_base), slot_ctrl);
 
 	if (rc) {
 		err("%s : hp_register_read_word SLOT_CTRL failed\n", __FUNCTION__);
···
 	if (!pciehp_poll_mode)
 		slot_cmd = slot_cmd | HP_INTR_ENABLE; 
 	pcie_write_cmd(slot, slot_cmd);
-	dbg("%s: SLOT_CTRL %x write cmd %x\n", __FUNCTION__, SLOT_CTRL, slot_cmd);
+	dbg("%s: SLOT_CTRL %x write cmd %x\n", __FUNCTION__, SLOT_CTRL(slot->ctrl->cap_base), slot_cmd);
 
 	return;
 }
···
 		return ;
 	}
 
-	rc = hp_register_read_word(php_ctlr->pci_dev, SLOT_CTRL, slot_ctrl);
+	rc = hp_register_read_word(php_ctlr->pci_dev, SLOT_CTRL(slot->ctrl->cap_base), slot_ctrl);
 
 	if (rc) {
 		err("%s : hp_register_read_word SLOT_CTRL failed\n", __FUNCTION__);
···
 		slot_cmd = slot_cmd | HP_INTR_ENABLE; 
 	pcie_write_cmd(slot, slot_cmd);
 
-	dbg("%s: SLOT_CTRL %x write cmd %x\n",__FUNCTION__, SLOT_CTRL, slot_cmd);
+	dbg("%s: SLOT_CTRL %x write cmd %x\n",__FUNCTION__, SLOT_CTRL(slot->ctrl->cap_base), slot_cmd);
 	return;
 }
 
···
 	*first_device_num = 0;
 	*num_ctlr_slots = 1; 
 
-	rc = hp_register_read_dword(php_ctlr->pci_dev, SLOT_CAP, slot_cap);
+	rc = hp_register_read_dword(php_ctlr->pci_dev, SLOT_CAP(ctrl->cap_base), slot_cap);
 
 	if (rc) {
 		err("%s : hp_register_read_dword SLOT_CAP failed\n", __FUNCTION__);
···
 		return -1;
 	}
 
-	retval = hp_register_read_word(php_ctlr->pci_dev, SLOT_CTRL, slot_ctrl);
+	retval = hp_register_read_word(php_ctlr->pci_dev, SLOT_CTRL(slot->ctrl->cap_base), slot_ctrl);
 
 	if (retval) {
 		err("%s : hp_register_read_word SLOT_CTRL failed\n", __FUNCTION__);
 		return retval;
 	}
-	dbg("%s: SLOT_CTRL %x, value read %xn", __FUNCTION__, SLOT_CTRL, 
+	dbg("%s: SLOT_CTRL %x, value read %xn", __FUNCTION__, SLOT_CTRL(slot->ctrl->cap_base),
 		slot_ctrl);
 
 	slot_cmd = (slot_ctrl & ~PWR_CTRL) | POWER_ON;
···
 		err("%s: Write %x command failed!\n", __FUNCTION__, slot_cmd);
 		return -1;
 	}
-	dbg("%s: SLOT_CTRL %x write cmd %x\n",__FUNCTION__, SLOT_CTRL, slot_cmd);
+	dbg("%s: SLOT_CTRL %x write cmd %x\n",__FUNCTION__, SLOT_CTRL(slot->ctrl->cap_base), slot_cmd);
 
 	DBG_LEAVE_ROUTINE
 
···
 		err("%s: Invalid HPC slot number!\n", __FUNCTION__);
 		return -1;
 	}
-	retval = hp_register_read_word(php_ctlr->pci_dev, SLOT_CTRL, slot_ctrl);
+	retval = hp_register_read_word(php_ctlr->pci_dev, SLOT_CTRL(slot->ctrl->cap_base), slot_ctrl);
 
 	if (retval) {
 		err("%s : hp_register_read_word SLOT_CTRL failed\n", __FUNCTION__);
 		return retval;
 	}
-	dbg("%s: SLOT_CTRL %x, value read %x\n", __FUNCTION__, SLOT_CTRL, 
+	dbg("%s: SLOT_CTRL %x, value read %x\n", __FUNCTION__, SLOT_CTRL(slot->ctrl->cap_base),
 		slot_ctrl);
 
 	slot_cmd = (slot_ctrl & ~PWR_CTRL) | POWER_OFF;
···
 		err("%s: Write command failed!\n", __FUNCTION__);
 		return -1;
 	}
-	dbg("%s: SLOT_CTRL %x write cmd %x\n",__FUNCTION__, SLOT_CTRL, slot_cmd);
+	dbg("%s: SLOT_CTRL %x write cmd %x\n",__FUNCTION__, SLOT_CTRL(slot->ctrl->cap_base), slot_cmd);
 
 	DBG_LEAVE_ROUTINE
 
···
 		return IRQ_NONE;
 	}
 
-	rc = hp_register_read_word(php_ctlr->pci_dev, SLOT_STATUS, slot_status);
+	rc = hp_register_read_word(php_ctlr->pci_dev, SLOT_STATUS(ctrl->cap_base), slot_status);
 	if (rc) {
 		err("%s : hp_register_read_word SLOT_STATUS failed\n", __FUNCTION__);
 		return IRQ_NONE;
···
 	dbg("%s: intr_loc %x\n", __FUNCTION__, intr_loc);
 	/* Mask Hot-plug Interrupt Enable */
 	if (!pciehp_poll_mode) {
-		rc = hp_register_read_word(php_ctlr->pci_dev, SLOT_CTRL, temp_word);
+		rc = hp_register_read_word(php_ctlr->pci_dev, SLOT_CTRL(ctrl->cap_base), temp_word);
 		if (rc) {
 			err("%s : hp_register_read_word SLOT_CTRL failed\n", __FUNCTION__);
 			return IRQ_NONE;
···
 		dbg("%s: hp_register_read_word SLOT_CTRL with value %x\n", __FUNCTION__, temp_word);
 		temp_word = (temp_word & ~HP_INTR_ENABLE & ~CMD_CMPL_INTR_ENABLE) | 0x00;
 
-		rc = hp_register_write_word(php_ctlr->pci_dev, SLOT_CTRL, temp_word);
+		rc = hp_register_write_word(php_ctlr->pci_dev, SLOT_CTRL(ctrl->cap_base), temp_word);
 		if (rc) {
 			err("%s : hp_register_write_word SLOT_CTRL failed\n", __FUNCTION__);
 			return IRQ_NONE;
 		}
 		dbg("%s: hp_register_write_word SLOT_CTRL with value %x\n", __FUNCTION__, temp_word);
 		
-		rc = hp_register_read_word(php_ctlr->pci_dev, SLOT_STATUS, slot_status);
+		rc = hp_register_read_word(php_ctlr->pci_dev, SLOT_STATUS(ctrl->cap_base), slot_status);
 		if (rc) {
 			err("%s : hp_register_read_word SLOT_STATUS failed\n", __FUNCTION__);
 			return IRQ_NONE;
···
 		
 		/* Clear command complete interrupt caused by this write */
 		temp_word = 0x1f;
-		rc = hp_register_write_word(php_ctlr->pci_dev, SLOT_STATUS, temp_word);
+		rc = hp_register_write_word(php_ctlr->pci_dev, SLOT_STATUS(ctrl->cap_base), temp_word);
 		if (rc) {
 			err("%s : hp_register_write_word SLOT_STATUS failed\n", __FUNCTION__);
 			return IRQ_NONE;
···
 
 	/* Clear all events after serving them */
 	temp_word = 0x1F;
-	rc = hp_register_write_word(php_ctlr->pci_dev, SLOT_STATUS, temp_word);
+	rc = hp_register_write_word(php_ctlr->pci_dev, SLOT_STATUS(ctrl->cap_base), temp_word);
 	if (rc) {
 		err("%s : hp_register_write_word SLOT_STATUS failed\n", __FUNCTION__);
 		return IRQ_NONE;
 	}
 	/* Unmask Hot-plug Interrupt Enable */
 	if (!pciehp_poll_mode) {
-		rc = hp_register_read_word(php_ctlr->pci_dev, SLOT_CTRL, temp_word);
+		rc = hp_register_read_word(php_ctlr->pci_dev, SLOT_CTRL(ctrl->cap_base), temp_word);
 		if (rc) {
 			err("%s : hp_register_read_word SLOT_CTRL failed\n", __FUNCTION__);
 			return IRQ_NONE;
···
 		dbg("%s: hp_register_read_word SLOT_CTRL with value %x\n", __FUNCTION__, temp_word);
 		temp_word = (temp_word & ~HP_INTR_ENABLE) | HP_INTR_ENABLE;
 
-		rc = hp_register_write_word(php_ctlr->pci_dev, SLOT_CTRL, temp_word);
+		rc = hp_register_write_word(php_ctlr->pci_dev, SLOT_CTRL(ctrl->cap_base), temp_word);
 		if (rc) {
 			err("%s : hp_register_write_word SLOT_CTRL failed\n", __FUNCTION__);
 			return IRQ_NONE;
 		}
 		dbg("%s: hp_register_write_word SLOT_CTRL with value %x\n", __FUNCTION__, temp_word); 	
 	
-		rc = hp_register_read_word(php_ctlr->pci_dev, SLOT_STATUS, slot_status);
+		rc = hp_register_read_word(php_ctlr->pci_dev, SLOT_STATUS(ctrl->cap_base), slot_status);
 		if (rc) {
 			err("%s : hp_register_read_word SLOT_STATUS failed\n", __FUNCTION__);
 			return IRQ_NONE;
···
 		
 		/* Clear command complete interrupt caused by this write */
 		temp_word = 0x1F;
-		rc = hp_register_write_word(php_ctlr->pci_dev, SLOT_STATUS, temp_word);
+		rc = hp_register_write_word(php_ctlr->pci_dev, SLOT_STATUS(ctrl->cap_base), temp_word);
 		if (rc) {
 			err("%s : hp_register_write_word SLOT_STATUS failed\n", __FUNCTION__);
 			return IRQ_NONE;
···
 		return -1;
 	}
 
-	retval = hp_register_read_dword(php_ctlr->pci_dev, LNK_CAP, lnk_cap);
+	retval = hp_register_read_dword(php_ctlr->pci_dev, LNK_CAP(slot->ctrl->cap_base), lnk_cap);
 
 	if (retval) {
 		err("%s : hp_register_read_dword  LNK_CAP failed\n", __FUNCTION__);
···
 		return -1;
 	}
 
-	retval = hp_register_read_dword(php_ctlr->pci_dev, LNK_CAP, lnk_cap);
+	retval = hp_register_read_dword(php_ctlr->pci_dev, LNK_CAP(slot->ctrl->cap_base), lnk_cap);
 
 	if (retval) {
 		err("%s : hp_register_read_dword  LNK_CAP failed\n", __FUNCTION__);
···
 		return -1;
 	}
 
-	retval = hp_register_read_word(php_ctlr->pci_dev, LNK_STATUS, lnk_status);
+	retval = hp_register_read_word(php_ctlr->pci_dev, LNK_STATUS(slot->ctrl->cap_base), lnk_status);
 
 	if (retval) {
 		err("%s : hp_register_read_word LNK_STATUS failed\n", __FUNCTION__);
···
 		return -1;
 	}
 
-	retval = hp_register_read_word(php_ctlr->pci_dev, LNK_STATUS, lnk_status);
+	retval = hp_register_read_word(php_ctlr->pci_dev, LNK_STATUS(slot->ctrl->cap_base), lnk_status);
 
 	if (retval) {
 		err("%s : hp_register_read_word LNK_STATUS failed\n", __FUNCTION__);
···
 		goto abort_free_ctlr;
 	}
 
-	pcie_cap_base = cap_base;
+	ctrl->cap_base = cap_base;
 
 	dbg("%s: pcie_cap_base %x\n", __FUNCTION__, pcie_cap_base);
 
-	rc = hp_register_read_word(pdev, CAP_REG, cap_reg);
+	rc = hp_register_read_word(pdev, CAP_REG(ctrl->cap_base), cap_reg);
 	if (rc) {
 		err("%s : hp_register_read_word CAP_REG failed\n", __FUNCTION__);
 		goto abort_free_ctlr;
 	}
-	dbg("%s: CAP_REG offset %x cap_reg %x\n", __FUNCTION__, CAP_REG, cap_reg);
+	dbg("%s: CAP_REG offset %x cap_reg %x\n", __FUNCTION__, CAP_REG(ctrl->cap_base), cap_reg);
 
-	if (((cap_reg & SLOT_IMPL) == 0) || ((cap_reg & DEV_PORT_TYPE) != 0x0040)){
+	if (((cap_reg & SLOT_IMPL) == 0) || (((cap_reg & DEV_PORT_TYPE) != 0x0040)
+		&& ((cap_reg & DEV_PORT_TYPE) != 0x0060))) {
 		dbg("%s : This is not a root port or the port is not connected to a slot\n", __FUNCTION__);
 		goto abort_free_ctlr;
 	}
 
-	rc = hp_register_read_dword(php_ctlr->pci_dev, SLOT_CAP, slot_cap);
+	rc = hp_register_read_dword(php_ctlr->pci_dev, SLOT_CAP(ctrl->cap_base), slot_cap);
 	if (rc) {
 		err("%s : hp_register_read_word CAP_REG failed\n", __FUNCTION__);
 		goto abort_free_ctlr;
 	}
-	dbg("%s: SLOT_CAP offset %x slot_cap %x\n", __FUNCTION__, SLOT_CAP, slot_cap);
+	dbg("%s: SLOT_CAP offset %x slot_cap %x\n", __FUNCTION__, SLOT_CAP(ctrl->cap_base), slot_cap);
 
 	if (!(slot_cap & HP_CAP)) {
 		dbg("%s : This slot is not hot-plug capable\n", __FUNCTION__);
 		goto abort_free_ctlr;
 	}
 	/* For debugging purpose */
-	rc = hp_register_read_word(php_ctlr->pci_dev, SLOT_STATUS, slot_status);
+	rc = hp_register_read_word(php_ctlr->pci_dev, SLOT_STATUS(ctrl->cap_base), slot_status);
 	if (rc) {
 		err("%s : hp_register_read_word SLOT_STATUS failed\n", __FUNCTION__);
 		goto abort_free_ctlr;
 	}
-	dbg("%s: SLOT_STATUS offset %x slot_status %x\n", __FUNCTION__, SLOT_STATUS, slot_status);
+	dbg("%s: SLOT_STATUS offset %x slot_status %x\n", __FUNCTION__, SLOT_STATUS(ctrl->cap_base), slot_status);
 
-	rc = hp_register_read_word(php_ctlr->pci_dev, SLOT_CTRL, slot_ctrl);
+	rc = hp_register_read_word(php_ctlr->pci_dev, SLOT_CTRL(ctrl->cap_base), slot_ctrl);
 	if (rc) {
 		err("%s : hp_register_read_word SLOT_CTRL failed\n", __FUNCTION__);
 		goto abort_free_ctlr;
 	}
-	dbg("%s: SLOT_CTRL offset %x slot_ctrl %x\n", __FUNCTION__, SLOT_CTRL, slot_ctrl);
+	dbg("%s: SLOT_CTRL offset %x slot_ctrl %x\n", __FUNCTION__, SLOT_CTRL(ctrl->cap_base), slot_ctrl);
 
 	if (first) {
 		spin_lock_init(&hpc_event_lock);
···
 	php_ctlr->num_slots = 1;
 
 	/* Mask Hot-plug Interrupt Enable */
-	rc = hp_register_read_word(pdev, SLOT_CTRL, temp_word);
+	rc = hp_register_read_word(pdev, SLOT_CTRL(ctrl->cap_base), temp_word);
 	if (rc) {
 		err("%s : hp_register_read_word SLOT_CTRL failed\n", __FUNCTION__);
 		goto abort_free_ctlr;
 	}
 
-	dbg("%s: SLOT_CTRL %x value read %x\n", __FUNCTION__, SLOT_CTRL, temp_word);
+	dbg("%s: SLOT_CTRL %x value read %x\n", __FUNCTION__, SLOT_CTRL(ctrl->cap_base), temp_word);
 	temp_word = (temp_word & ~HP_INTR_ENABLE & ~CMD_CMPL_INTR_ENABLE) | 0x00;
 
-	rc = hp_register_write_word(pdev, SLOT_CTRL, temp_word);
+	rc = hp_register_write_word(pdev, SLOT_CTRL(ctrl->cap_base), temp_word);
 	if (rc) {
 		err("%s : hp_register_write_word SLOT_CTRL failed\n", __FUNCTION__);
 		goto abort_free_ctlr;
 	}
 	dbg("%s : Mask HPIE hp_register_write_word SLOT_CTRL %x\n", __FUNCTION__, temp_word);
 
-	rc = hp_register_read_word(php_ctlr->pci_dev, SLOT_STATUS, slot_status);
+	rc = hp_register_read_word(php_ctlr->pci_dev, SLOT_STATUS(ctrl->cap_base), slot_status);
 	if (rc) {
 		err("%s : hp_register_read_word SLOT_STATUS failed\n", __FUNCTION__);
 		goto abort_free_ctlr;
 	}
-	dbg("%s: Mask HPIE SLOT_STATUS offset %x reads slot_status %x\n", __FUNCTION__, SLOT_STATUS, slot_status);
+	dbg("%s: Mask HPIE SLOT_STATUS offset %x reads slot_status %x\n", __FUNCTION__, SLOT_STATUS(ctrl->cap_base)
+		, slot_status);
 
 	temp_word = 0x1F; /* Clear all events */
-	rc = hp_register_write_word(php_ctlr->pci_dev, SLOT_STATUS, temp_word);
+	rc = hp_register_write_word(php_ctlr->pci_dev, SLOT_STATUS(ctrl->cap_base), temp_word);
 	if (rc) {
 		err("%s : hp_register_write_word SLOT_STATUS failed\n", __FUNCTION__);
 		goto abort_free_ctlr;
 	}
-	dbg("%s: SLOT_STATUS offset %x writes slot_status %x\n", __FUNCTION__, SLOT_STATUS, temp_word);
+	dbg("%s: SLOT_STATUS offset %x writes slot_status %x\n", __FUNCTION__, SLOT_STATUS(ctrl->cap_base), temp_word);
 
 	if (pciehp_poll_mode)  {/* Install interrupt polling code */
 		/* Install and start the interrupt polling timer */
···
 		}
 	}
 
-	rc = hp_register_read_word(pdev, SLOT_CTRL, temp_word);
+	rc = hp_register_read_word(pdev, SLOT_CTRL(ctrl->cap_base), temp_word);
 	if (rc) {
 		err("%s : hp_register_read_word SLOT_CTRL failed\n", __FUNCTION__);
 		goto abort_free_ctlr;
 	}
-	dbg("%s: SLOT_CTRL %x value read %x\n", __FUNCTION__, SLOT_CTRL, temp_word);
+	dbg("%s: SLOT_CTRL %x value read %x\n", __FUNCTION__, SLOT_CTRL(ctrl->cap_base), temp_word);
 	dbg("%s: slot_cap %x\n", __FUNCTION__, slot_cap);
 
 	intr_enable = intr_enable | PRSN_DETECT_ENABLE;
···
 	dbg("%s: temp_word %x\n", __FUNCTION__, temp_word);
 
 	/* Unmask Hot-plug Interrupt Enable for the interrupt notification mechanism case */
-	rc = hp_register_write_word(pdev, SLOT_CTRL, temp_word);
+	rc = hp_register_write_word(pdev, SLOT_CTRL(ctrl->cap_base), temp_word);
 	if (rc) {
 		err("%s : hp_register_write_word SLOT_CTRL failed\n", __FUNCTION__);
 		goto abort_free_ctlr;
 	}
 	dbg("%s : Unmask HPIE hp_register_write_word SLOT_CTRL with %x\n", __FUNCTION__, temp_word);
-	rc = hp_register_read_word(php_ctlr->pci_dev, SLOT_STATUS, slot_status);
+	rc = hp_register_read_word(php_ctlr->pci_dev, SLOT_STATUS(ctrl->cap_base), slot_status);
 	if (rc) {
 		err("%s : hp_register_read_word SLOT_STATUS failed\n", __FUNCTION__);
 		goto abort_free_ctlr;
 	}
 	dbg("%s: Unmask HPIE SLOT_STATUS offset %x reads slot_status %x\n", __FUNCTION__, 
-		SLOT_STATUS, slot_status);
+		SLOT_STATUS(ctrl->cap_base), slot_status);
 	
 	temp_word =  0x1F; /* Clear all events */
-	rc = hp_register_write_word(php_ctlr->pci_dev, SLOT_STATUS, temp_word);
+	rc = hp_register_write_word(php_ctlr->pci_dev, SLOT_STATUS(ctrl->cap_base), temp_word);
 	if (rc) {
 		err("%s : hp_register_write_word SLOT_STATUS failed\n", __FUNCTION__);
 		goto abort_free_ctlr;
 	}
-	dbg("%s: SLOT_STATUS offset %x writes slot_status %x\n", __FUNCTION__, SLOT_STATUS, temp_word);
+	dbg("%s: SLOT_STATUS offset %x writes slot_status %x\n", __FUNCTION__, SLOT_STATUS(ctrl->cap_base), temp_word);
 	
 	/*  Add this HPC instance into the HPC list */
 	spin_lock(&list_lock);

drivers/pci/hotplug/shpchp_core.c

···
  */
 static void release_slot(struct hotplug_slot *hotplug_slot)
 {
-	struct slot *slot = (struct slot *)hotplug_slot->private;
+	struct slot *slot = hotplug_slot->private;
 
 	dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
 

drivers/pci/hotplug/shpchp_ctrl.c

···
 	func = shpchp_slot_find(p_slot->bus, p_slot->device, 0);
 	if (!func) {
 		dbg("%s: Error! slot NULL\n", __FUNCTION__);
-		return 1;
+		return -ENODEV;
 	}
 
 	/* Check to see if (latch closed, card present, power off) */
···
 	if (rc || !getstatus) {
 		info("%s: no adapter on slot(%x)\n", __FUNCTION__, p_slot->number);
 		up(&p_slot->ctrl->crit_sect);
-		return 1;
+		return -ENODEV;
 	}
 	rc = p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
 	if (rc || getstatus) {
 		info("%s: latch open on slot(%x)\n", __FUNCTION__, p_slot->number);
 		up(&p_slot->ctrl->crit_sect);
-		return 1;
+		return -ENODEV;
 	}
 	rc = p_slot->hpc_ops->get_power_status(p_slot, &getstatus);
 	if (rc || getstatus) {
 		info("%s: already enabled on slot(%x)\n", __FUNCTION__, p_slot->number);
 		up(&p_slot->ctrl->crit_sect);
-		return 1;
+		return -ENODEV;
 	}
 	up(&p_slot->ctrl->crit_sect);
 
···
 
 	func = shpchp_slot_create(p_slot->bus);
 	if (func == NULL)
-		return 1;
+		return -ENOMEM;
 
 	func->bus = p_slot->bus;
 	func->device = p_slot->device;
···
 		/* Setup slot structure with entry for empty slot */
 		func = shpchp_slot_create(p_slot->bus);
 		if (func == NULL)
-			return (1);	/* Out of memory */
+			return -ENOMEM;	/* Out of memory */
 
 		func->bus = p_slot->bus;
 		func->device = p_slot->device;
···
 	struct pci_func *func;
 
 	if (!p_slot->ctrl)
-		return 1;
+		return -ENODEV;
 
 	pci_bus = p_slot->ctrl->pci_dev->subordinate;
 
···
 	if (ret || !getstatus) {
 		info("%s: no adapter on slot(%x)\n", __FUNCTION__, p_slot->number);
 		up(&p_slot->ctrl->crit_sect);
-		return 1;
+		return -ENODEV;
 	}
 	ret = p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
 	if (ret || getstatus) {
 		info("%s: latch open on slot(%x)\n", __FUNCTION__, p_slot->number);
 		up(&p_slot->ctrl->crit_sect);
-		return 1;
+		return -ENODEV;
 	}
 	ret = p_slot->hpc_ops->get_power_status(p_slot, &getstatus);
 	if (ret || !getstatus) {
 		info("%s: already disabled slot(%x)\n", __FUNCTION__, p_slot->number);
 		up(&p_slot->ctrl->crit_sect);
-		return 1;
+		return -ENODEV;
 	}
 	up(&p_slot->ctrl->crit_sect);
 
···
 		/* Check the Class Code */
 		rc = pci_bus_read_config_byte (pci_bus, devfn, 0x0B, &class_code);
 		if (rc)
-			return rc;
+			return -ENODEV;
 
 		if (class_code == PCI_BASE_CLASS_DISPLAY) {
 			/* Display/Video adapter (not supported) */
···
 			/* See if it's a bridge */
 			rc = pci_bus_read_config_byte (pci_bus, devfn, PCI_HEADER_TYPE, &header_type);
 			if (rc)
-				return rc;
+				return -ENODEV;
 
 			/* If it's a bridge, check the VGA Enable bit */
 			if ((header_type & 0x7F) == PCI_HEADER_TYPE_BRIDGE) {
 				rc = pci_bus_read_config_byte (pci_bus, devfn, PCI_BRIDGE_CONTROL, &BCR);
 				if (rc)
-					return rc;
+					return -ENODEV;
 
 				/* If the VGA Enable bit is set, remove isn't supported */
 				if (BCR & PCI_BRIDGE_CTL_VGA) {
···
 	if ((func != NULL) && !rc) {
 		rc = remove_board(func, p_slot->ctrl);
 	} else if (!rc)
-		rc = 1;
+		rc = -ENODEV;
 
 	if (p_slot)
 		update_slot_info(p_slot);
 
-	return(rc);
+	return rc;
 }
 
 

drivers/pci/pci-sysfs.c

···
 	return (str - buf);
 }
 
+static ssize_t modalias_show(struct device *dev, char *buf)
+{
+	struct pci_dev *pci_dev = to_pci_dev(dev);
+
+	return sprintf(buf, "pci:v%08Xd%08Xsv%08Xsd%08Xbc%02Xsc%02Xi%02x\n",
+		       pci_dev->vendor, pci_dev->device,
+		       pci_dev->subsystem_vendor, pci_dev->subsystem_device,
+		       (u8)(pci_dev->class >> 16), (u8)(pci_dev->class >> 8),
+		       (u8)(pci_dev->class));
+}
+
 struct device_attribute pci_dev_attrs[] = {
 	__ATTR_RO(resource),
 	__ATTR_RO(vendor),
···
 	__ATTR_RO(class),
 	__ATTR_RO(irq),
 	__ATTR_RO(local_cpus),
+	__ATTR_RO(modalias),
 	__ATTR_NULL,
 };
 

drivers/pci/pci.h

···
 extern unsigned char pci_bus_max_busnr(struct pci_bus *bus);
 extern int pci_bus_find_capability (struct pci_bus *bus, unsigned int devfn, int cap);
 
-struct pci_dev_wrapped {
-	struct pci_dev	*dev;
-	void		*data;
-};
-
-struct pci_bus_wrapped {
-	struct pci_bus	*bus;
-	void		*data;
-};
-
-struct pci_visit {
-	int (* pre_visit_pci_bus)	(struct pci_bus_wrapped *,
-					 struct pci_dev_wrapped *);
-	int (* post_visit_pci_bus)	(struct pci_bus_wrapped *,
-					 struct pci_dev_wrapped *);
-
-	int (* pre_visit_pci_dev)	(struct pci_dev_wrapped *,
-					 struct pci_bus_wrapped *);
-	int (* visit_pci_dev)		(struct pci_dev_wrapped *,
-					 struct pci_bus_wrapped *);
-	int (* post_visit_pci_dev)	(struct pci_dev_wrapped *,
-					 struct pci_bus_wrapped *);
-};
-
-extern int pci_visit_dev(struct pci_visit *fn,
-			 struct pci_dev_wrapped *wrapped_dev,
-			 struct pci_bus_wrapped *wrapped_parent);
 extern void pci_remove_legacy_files(struct pci_bus *bus);
 
 /* Lock for read/write access to pci device and bus lists */

drivers/pci/pcie/portdrv_bus.c

···
 		driver->id_table->vendor != pciedev->id.vendor) ||
 	       (driver->id_table->device != PCI_ANY_ID &&
 		driver->id_table->device != pciedev->id.device) ||	
-		driver->id_table->port_type != pciedev->id.port_type ||
+	       (driver->id_table->port_type != PCIE_ANY_PORT &&
+		driver->id_table->port_type != pciedev->id.port_type) ||
 		driver->id_table->service_type != pciedev->id.service_type )
 		return 0;
 

drivers/scsi/libata-core.c

···
 	unsigned long timeout = jiffies + (HZ * 5);
 
 	if (ap->flags & ATA_FLAG_SATA_RESET) {
-		scr_write(ap, SCR_CONTROL, 0x301); /* issue phy wake/reset */
-		scr_read(ap, SCR_STATUS);	/* dummy read; flush */
+		/* issue phy wake/reset */
+		scr_write_flush(ap, SCR_CONTROL, 0x301);
 		udelay(400);			/* FIXME: a guess */
 	}
-	scr_write(ap, SCR_CONTROL, 0x300);	/* issue phy wake/clear reset */
+	scr_write_flush(ap, SCR_CONTROL, 0x300); /* phy wake/clear reset */
 
 	/* wait for phy to become ready, if necessary */
 	do {
···
 	ata_sg_init_one(qc, cmd->sense_buffer, sizeof(cmd->sense_buffer));
 	qc->dma_dir = DMA_FROM_DEVICE;
 
-	memset(&qc->cdb, 0, sizeof(ap->cdb_len));
+	memset(&qc->cdb, 0, ap->cdb_len);
 	qc->cdb[0] = REQUEST_SENSE;
 	qc->cdb[4] = SCSI_SENSE_BUFFERSIZE;
 
···
 
 	/* call completion callback */
 	rc = qc->complete_fn(qc, drv_stat);
+	qc->flags &= ~ATA_QCFLAG_ACTIVE;
 
 	/* if callback indicates not to complete command (non-zero),
 	 * return immediately
···
 			struct ata_queued_cmd *qc;
 
 			qc = ata_qc_from_tag(ap, ap->active_tag);
-			if (qc && (!(qc->tf.ctl & ATA_NIEN)))
+			if (qc && (!(qc->tf.ctl & ATA_NIEN)) &&
+			    (qc->flags & ATA_QCFLAG_ACTIVE))
 				handled |= ata_host_intr(ap, qc);
 		}
 	}

drivers/scsi/libata-scsi.c

···
 		 */
 		if ((dev->flags & ATA_DFLAG_LBA48) &&
 		    ((dev->flags & ATA_DFLAG_LOCK_SECTORS) == 0)) {
-			sdev->host->max_sectors = 2048;
+			/*
+			 * do not overwrite sdev->host->max_sectors, since
+			 * other drives on this host may not support LBA48
+			 */
 			blk_queue_max_sectors(sdev->request_queue, 2048);
 		}
 	}

drivers/scsi/sata_svw.c

···
 
 	/* Clear a magic bit in SCR1 according to Darwin, those help
 	 * some funky seagate drives (though so far, those were already
-	 * set by the firmware on the machines I had access to
+	 * set by the firmware on the machines I had access to)
 	 */
 	writel(readl(mmio_base + K2_SATA_SICR1_OFFSET) & ~0x00040000,
 	       mmio_base + K2_SATA_SICR1_OFFSET);

fs/ext3/super.c

···
 		       int errno)
 {
 	char nbuf[16];
-	const char *errstr = ext3_decode_error(sb, errno, nbuf);
+	const char *errstr;
 
+	/* Special case: if the error is EROFS, and we're not already
+	 * inside a transaction, then there's really no point in logging
+	 * an error. */
+	if (errno == -EROFS && journal_current_handle() == NULL &&
+	    (sb->s_flags & MS_RDONLY))
+		return;
+
+	errstr = ext3_decode_error(sb, errno, nbuf);
 	printk (KERN_CRIT "EXT3-fs error (device %s) in %s: %s\n",
 		sb->s_id, function, errstr);
 

include/linux/libata.h

···
 	ap->ops->scr_write(ap, reg, val);
 }
 
+static inline void scr_write_flush(struct ata_port *ap, unsigned int reg, 
+				   u32 val)
+{
+	ap->ops->scr_write(ap, reg, val);
+	(void) ap->ops->scr_read(ap, reg);
+}
+
 static inline unsigned int sata_dev_present(struct ata_port *ap)
 {
 	return ((scr_read(ap, SCR_STATUS) & 0xf) == 0x3) ? 1 : 0;