示例#1
0
static int eeh_reset_device (struct pci_dn *pe_dn, struct pci_bus *bus)
{
	int cnt, rc;

	/* pcibios will clear the counter; save the value */
	cnt = pe_dn->eeh_freeze_count;

	if (bus)
		pcibios_remove_pci_devices(bus);

	/* Reset the pci controller. (Asserts RST#; resets config space).
	 * Reconfigure bridges and devices. Don't try to bring the system
	 * up if the reset failed for some reason. */
	rc = rtas_set_slot_reset(pe_dn);
	if (rc)
		return rc;

 	/* New-style config addrs might be shared across multiple devices,
 	 * Walk over all functions on this device */
 	if (pe_dn->eeh_pe_config_addr) {
 		struct device_node *pe = pe_dn->node;
 		pe = pe->parent->child;
 		while (pe) {
 			struct pci_dn *ppe = PCI_DN(pe);
 			if (pe_dn->eeh_pe_config_addr == ppe->eeh_pe_config_addr) {
 				rtas_configure_bridge(ppe);
 				eeh_restore_bars(ppe);
 			}
 			pe = pe->sibling;
 		}
 	} else {
 		rtas_configure_bridge(pe_dn);
 		eeh_restore_bars(pe_dn);
 	}

	/* Give the system 5 seconds to finish running the user-space
	 * hotplug shutdown scripts, e.g. ifdown for ethernet.  Yes, 
	 * this is a hack, but if we don't do this, and try to bring 
	 * the device up before the scripts have taken it down, 
	 * potentially weird things happen.
	 */
	if (bus) {
		ssleep (5);
		pcibios_add_pci_devices(bus);
	}
	pe_dn->eeh_freeze_count = cnt;

	return 0;
}
示例#2
0
/**
 * eeh_reset_device - Perform actual reset of a pci slot
 * @edev: PE associated EEH device
 * @bus: PCI bus corresponding to the isolcated slot
 *
 * This routine must be called to do reset on the indicated PE.
 * During the reset, udev might be invoked because those affected
 * PCI devices will be removed and then added.
 */
static int eeh_reset_device(struct eeh_dev *edev, struct pci_bus *bus)
{
	struct device_node *dn;
	int cnt, rc;

	/* pcibios will clear the counter; save the value */
	cnt = edev->freeze_count;

	if (bus)
		pcibios_remove_pci_devices(bus);

	/* Reset the pci controller. (Asserts RST#; resets config space).
	 * Reconfigure bridges and devices. Don't try to bring the system
	 * up if the reset failed for some reason.
	 */
	rc = eeh_reset_pe(edev);
	if (rc)
		return rc;

	/* Walk over all functions on this device. */
	dn = eeh_dev_to_of_node(edev);
	if (!pcibios_find_pci_bus(dn) && of_node_to_eeh_dev(dn->parent))
		dn = dn->parent->child;

	while (dn) {
		struct eeh_dev *pedev = of_node_to_eeh_dev(dn);

		/* On Power4, always true because eeh_pe_config_addr=0 */
		if (edev->pe_config_addr == pedev->pe_config_addr) {
			eeh_ops->configure_bridge(dn);
			eeh_restore_bars(pedev);
 		}
		dn = dn->sibling;
	}

	/* Give the system 5 seconds to finish running the user-space
	 * hotplug shutdown scripts, e.g. ifdown for ethernet.  Yes, 
	 * this is a hack, but if we don't do this, and try to bring 
	 * the device up before the scripts have taken it down, 
	 * potentially weird things happen.
	 */
	if (bus) {
		ssleep(5);
		pcibios_add_pci_devices(bus);
	}
	edev->freeze_count = cnt;

	return 0;
}
示例#3
0
static int eeh_reset_device(struct eeh_dev *edev, struct pci_bus *bus)
{
	struct device_node *dn;
	int cnt, rc;

	
	cnt = edev->freeze_count;

	if (bus)
		pcibios_remove_pci_devices(bus);

	rc = eeh_reset_pe(edev);
	if (rc)
		return rc;

	
	dn = eeh_dev_to_of_node(edev);
	if (!pcibios_find_pci_bus(dn) && of_node_to_eeh_dev(dn->parent))
		dn = dn->parent->child;

	while (dn) {
		struct eeh_dev *pedev = of_node_to_eeh_dev(dn);

		
		if (edev->pe_config_addr == pedev->pe_config_addr) {
			eeh_ops->configure_bridge(dn);
			eeh_restore_bars(pedev);
 		}
		dn = dn->sibling;
	}

	if (bus) {
		ssleep(5);
		pcibios_add_pci_devices(bus);
	}
	edev->freeze_count = cnt;

	return 0;
}
示例#4
0
struct pci_dn * handle_eeh_events (struct eeh_event *event)
{
	struct device_node *frozen_dn;
	struct pci_dn *frozen_pdn;
	struct pci_bus *frozen_bus;
	int rc = 0;
	enum pci_ers_result result = PCI_ERS_RESULT_NONE;
	const char *location, *pci_str, *drv_str;

	frozen_dn = find_device_pe(event->dn);
	if (!frozen_dn) {

		location = of_get_property(event->dn, "ibm,loc-code", NULL);
		location = location ? location : "unknown";
		printk(KERN_ERR "EEH: Error: Cannot find partition endpoint "
		                "for location=%s pci addr=%s\n",
		        location, pci_name(event->dev));
		return NULL;
	}

	frozen_bus = pcibios_find_pci_bus(frozen_dn);
	location = of_get_property(frozen_dn, "ibm,loc-code", NULL);
	location = location ? location : "unknown";

	/* There are two different styles for coming up with the PE.
	 * In the old style, it was the highest EEH-capable device
	 * which was always an EADS pci bridge.  In the new style,
	 * there might not be any EADS bridges, and even when there are,
	 * the firmware marks them as "EEH incapable". So another
	 * two-step is needed to find the pci bus.. */
	if (!frozen_bus)
		frozen_bus = pcibios_find_pci_bus (frozen_dn->parent);

	if (!frozen_bus) {
		printk(KERN_ERR "EEH: Cannot find PCI bus "
		        "for location=%s dn=%s\n",
		        location, frozen_dn->full_name);
		return NULL;
	}

	frozen_pdn = PCI_DN(frozen_dn);
	frozen_pdn->eeh_freeze_count++;

	if (frozen_pdn->pcidev) {
		pci_str = pci_name (frozen_pdn->pcidev);
		drv_str = pcid_name (frozen_pdn->pcidev);
	} else {
		pci_str = pci_name (event->dev);
		drv_str = pcid_name (event->dev);
	}
	
	if (frozen_pdn->eeh_freeze_count > EEH_MAX_ALLOWED_FREEZES)
		goto excess_failures;

	printk(KERN_WARNING
	   "EEH: This PCI device has failed %d times in the last hour:\n",
		frozen_pdn->eeh_freeze_count);
	printk(KERN_WARNING
		"EEH: location=%s driver=%s pci addr=%s\n",
		location, drv_str, pci_str);

	/* Walk the various device drivers attached to this slot through
	 * a reset sequence, giving each an opportunity to do what it needs
	 * to accomplish the reset.  Each child gets a report of the
	 * status ... if any child can't handle the reset, then the entire
	 * slot is dlpar removed and added.
	 */
	pci_walk_bus(frozen_bus, eeh_report_error, &result);

	/* Get the current PCI slot state. This can take a long time,
	 * sometimes over 3 seconds for certain systems. */
	rc = eeh_wait_for_slot_status (frozen_pdn, MAX_WAIT_FOR_RECOVERY*1000);
	if (rc < 0) {
		printk(KERN_WARNING "EEH: Permanent failure\n");
		goto hard_fail;
	}

	/* Since rtas may enable MMIO when posting the error log,
	 * don't post the error log until after all dev drivers
	 * have been informed.
	 */
	eeh_slot_error_detail(frozen_pdn, EEH_LOG_TEMP_FAILURE);

	/* If all device drivers were EEH-unaware, then shut
	 * down all of the device drivers, and hope they
	 * go down willingly, without panicing the system.
	 */
	if (result == PCI_ERS_RESULT_NONE) {
		rc = eeh_reset_device(frozen_pdn, frozen_bus);
		if (rc) {
			printk(KERN_WARNING "EEH: Unable to reset, rc=%d\n", rc);
			goto hard_fail;
		}
	}

	/* If all devices reported they can proceed, then re-enable MMIO */
	if (result == PCI_ERS_RESULT_CAN_RECOVER) {
		rc = rtas_pci_enable(frozen_pdn, EEH_THAW_MMIO);

		if (rc < 0)
			goto hard_fail;
		if (rc) {
			result = PCI_ERS_RESULT_NEED_RESET;
		} else {
			result = PCI_ERS_RESULT_NONE;
			pci_walk_bus(frozen_bus, eeh_report_mmio_enabled, &result);
		}
	}

	/* If all devices reported they can proceed, then re-enable DMA */
	if (result == PCI_ERS_RESULT_CAN_RECOVER) {
		rc = rtas_pci_enable(frozen_pdn, EEH_THAW_DMA);

		if (rc < 0)
			goto hard_fail;
		if (rc)
			result = PCI_ERS_RESULT_NEED_RESET;
		else
			result = PCI_ERS_RESULT_RECOVERED;
	}

	/* If any device has a hard failure, then shut off everything. */
	if (result == PCI_ERS_RESULT_DISCONNECT) {
		printk(KERN_WARNING "EEH: Device driver gave up\n");
		goto hard_fail;
	}

	/* If any device called out for a reset, then reset the slot */
	if (result == PCI_ERS_RESULT_NEED_RESET) {
		rc = eeh_reset_device(frozen_pdn, NULL);
		if (rc) {
			printk(KERN_WARNING "EEH: Cannot reset, rc=%d\n", rc);
			goto hard_fail;
		}
		result = PCI_ERS_RESULT_NONE;
		pci_walk_bus(frozen_bus, eeh_report_reset, &result);
	}

	/* All devices should claim they have recovered by now. */
	if ((result != PCI_ERS_RESULT_RECOVERED) &&
	    (result != PCI_ERS_RESULT_NONE)) {
		printk(KERN_WARNING "EEH: Not recovered\n");
		goto hard_fail;
	}

	/* Tell all device drivers that they can resume operations */
	pci_walk_bus(frozen_bus, eeh_report_resume, NULL);

	return frozen_pdn;
	
excess_failures:
	/*
	 * About 90% of all real-life EEH failures in the field
	 * are due to poorly seated PCI cards. Only 10% or so are
	 * due to actual, failed cards.
	 */
	printk(KERN_ERR
	   "EEH: PCI device at location=%s driver=%s pci addr=%s \n"
		"has failed %d times in the last hour "
		"and has been permanently disabled. \n"
		"Please try reseating this device or replacing it.\n",
		location, drv_str, pci_str, frozen_pdn->eeh_freeze_count);
	goto perm_error;

hard_fail:
	printk(KERN_ERR
	   "EEH: Unable to recover from failure of PCI device "
	   "at location=%s driver=%s pci addr=%s \n"
	   "Please try reseating this device or replacing it.\n",
		location, drv_str, pci_str);

perm_error:
	eeh_slot_error_detail(frozen_pdn, EEH_LOG_PERM_FAILURE);

	/* Notify all devices that they're about to go down. */
	pci_walk_bus(frozen_bus, eeh_report_failure, NULL);

	/* Shut down the device drivers for good. */
	pcibios_remove_pci_devices(frozen_bus);

	return NULL;
}
示例#5
0
/**
 * eeh_reset_device - Perform actual reset of a pci slot
 * @pe: EEH PE
 * @bus: PCI bus corresponding to the isolcated slot
 *
 * This routine must be called to do reset on the indicated PE.
 * During the reset, udev might be invoked because those affected
 * PCI devices will be removed and then added.
 */
static int eeh_reset_device(struct eeh_pe *pe, struct pci_bus *bus)
{
	struct pci_bus *frozen_bus = eeh_pe_bus_get(pe);
	struct timeval tstamp;
	int cnt, rc, removed = 0;

	/* pcibios will clear the counter; save the value */
	cnt = pe->freeze_count;
	tstamp = pe->tstamp;

	/*
	 * We don't remove the corresponding PE instances because
	 * we need the information afterwords. The attached EEH
	 * devices are expected to be attached soon when calling
	 * into pcibios_add_pci_devices().
	 */
	eeh_pe_state_mark(pe, EEH_PE_KEEP);
	if (bus) {
		pci_lock_rescan_remove();
		pcibios_remove_pci_devices(bus);
		pci_unlock_rescan_remove();
	} else if (frozen_bus) {
		eeh_pe_dev_traverse(pe, eeh_rmv_device, &removed);
	}

	/*
	 * Reset the pci controller. (Asserts RST#; resets config space).
	 * Reconfigure bridges and devices. Don't try to bring the system
	 * up if the reset failed for some reason.
	 *
	 * During the reset, it's very dangerous to have uncontrolled PCI
	 * config accesses. So we prefer to block them. However, controlled
	 * PCI config accesses initiated from EEH itself are allowed.
	 */
	eeh_pe_state_mark(pe, EEH_PE_RESET);
	rc = eeh_reset_pe(pe);
	if (rc) {
		eeh_pe_state_clear(pe, EEH_PE_RESET);
		return rc;
	}

	pci_lock_rescan_remove();

	/* Restore PE */
	eeh_ops->configure_bridge(pe);
	eeh_pe_restore_bars(pe);
	eeh_pe_state_clear(pe, EEH_PE_RESET);

	/* Clear frozen state */
	rc = eeh_clear_pe_frozen_state(pe);
	if (rc)
		return rc;

	/* Give the system 5 seconds to finish running the user-space
	 * hotplug shutdown scripts, e.g. ifdown for ethernet.  Yes,
	 * this is a hack, but if we don't do this, and try to bring
	 * the device up before the scripts have taken it down,
	 * potentially weird things happen.
	 */
	if (bus) {
		pr_info("EEH: Sleep 5s ahead of complete hotplug\n");
		ssleep(5);

		/*
		 * The EEH device is still connected with its parent
		 * PE. We should disconnect it so the binding can be
		 * rebuilt when adding PCI devices.
		 */
		eeh_pe_traverse(pe, eeh_pe_detach_dev, NULL);
		pcibios_add_pci_devices(bus);
	} else if (frozen_bus && removed) {
		pr_info("EEH: Sleep 5s ahead of partial hotplug\n");
		ssleep(5);

		eeh_pe_traverse(pe, eeh_pe_detach_dev, NULL);
		pcibios_add_pci_devices(frozen_bus);
	}
	eeh_pe_state_clear(pe, EEH_PE_KEEP);

	pe->tstamp = tstamp;
	pe->freeze_count = cnt;

	pci_unlock_rescan_remove();
	return 0;
}
示例#6
0
struct pci_dn * handle_eeh_events (struct eeh_event *event)
{
	struct device_node *frozen_dn;
	struct pci_dn *frozen_pdn;
	struct pci_bus *frozen_bus;
	int rc = 0;
	enum pci_ers_result result = PCI_ERS_RESULT_NONE;
	const char *location, *pci_str, *drv_str;

	frozen_dn = find_device_pe(event->dn);
	frozen_bus = pcibios_find_pci_bus(frozen_dn);

	if (!frozen_dn) {

		location = (char *) get_property(event->dn, "ibm,loc-code", NULL);
		location = location ? location : "unknown";
		printk(KERN_ERR "EEH: Error: Cannot find partition endpoint "
		                "for location=%s pci addr=%s\n",
		        location, pci_name(event->dev));
		return NULL;
	}
	location = (char *) get_property(frozen_dn, "ibm,loc-code", NULL);
	location = location ? location : "unknown";

	/* There are two different styles for coming up with the PE.
	 * In the old style, it was the highest EEH-capable device
	 * which was always an EADS pci bridge.  In the new style,
	 * there might not be any EADS bridges, and even when there are,
	 * the firmware marks them as "EEH incapable". So another
	 * two-step is needed to find the pci bus.. */
	if (!frozen_bus)
		frozen_bus = pcibios_find_pci_bus (frozen_dn->parent);

	if (!frozen_bus) {
		printk(KERN_ERR "EEH: Cannot find PCI bus "
		        "for location=%s dn=%s\n",
		        location, frozen_dn->full_name);
		return NULL;
	}

#if 0
	/* We may get "permanent failure" messages on empty slots.
	 * These are false alarms. Empty slots have no child dn. */
	if ((event->state == pci_channel_io_perm_failure) && (frozen_device == NULL))
		return;
#endif

	frozen_pdn = PCI_DN(frozen_dn);
	frozen_pdn->eeh_freeze_count++;

	if (frozen_pdn->pcidev) {
		pci_str = pci_name (frozen_pdn->pcidev);
		drv_str = pcid_name (frozen_pdn->pcidev);
	} else {
		pci_str = pci_name (event->dev);
		drv_str = pcid_name (event->dev);
	}
	
	if (frozen_pdn->eeh_freeze_count > EEH_MAX_ALLOWED_FREEZES)
		goto excess_failures;

	/* If the reset state is a '5' and the time to reset is 0 (infinity)
	 * or is more then 15 seconds, then mark this as a permanent failure.
	 */
	if ((event->state == pci_channel_io_perm_failure) &&
	    ((event->time_unavail <= 0) ||
	     (event->time_unavail > MAX_WAIT_FOR_RECOVERY*1000)))
		goto hard_fail;

	eeh_slot_error_detail(frozen_pdn, 1 /* Temporary Error */);
	printk(KERN_WARNING
	   "EEH: This PCI device has failed %d times since last reboot: "
		"location=%s driver=%s pci addr=%s\n",
		frozen_pdn->eeh_freeze_count, location, drv_str, pci_str);

	/* Walk the various device drivers attached to this slot through
	 * a reset sequence, giving each an opportunity to do what it needs
	 * to accomplish the reset.  Each child gets a report of the
	 * status ... if any child can't handle the reset, then the entire
	 * slot is dlpar removed and added.
	 */
	pci_walk_bus(frozen_bus, eeh_report_error, &result);

	/* If all device drivers were EEH-unaware, then shut
	 * down all of the device drivers, and hope they
	 * go down willingly, without panicing the system.
	 */
	if (result == PCI_ERS_RESULT_NONE) {
		rc = eeh_reset_device(frozen_pdn, frozen_bus);
		if (rc)
			goto hard_fail;
	}

	/* If any device called out for a reset, then reset the slot */
	if (result == PCI_ERS_RESULT_NEED_RESET) {
		rc = eeh_reset_device(frozen_pdn, NULL);
		if (rc)
			goto hard_fail;
		pci_walk_bus(frozen_bus, eeh_report_reset, NULL);
	}

	/* If all devices reported they can proceed, the re-enable PIO */
	if (result == PCI_ERS_RESULT_CAN_RECOVER) {
		/* XXX Not supported; we brute-force reset the device */
		rc = eeh_reset_device(frozen_pdn, NULL);
		if (rc)
			goto hard_fail;
		pci_walk_bus(frozen_bus, eeh_report_reset, NULL);
	}

	/* Tell all device drivers that they can resume operations */
	pci_walk_bus(frozen_bus, eeh_report_resume, NULL);

	return frozen_pdn;
	
excess_failures:
	/*
	 * About 90% of all real-life EEH failures in the field
	 * are due to poorly seated PCI cards. Only 10% or so are
	 * due to actual, failed cards.
	 */
	printk(KERN_ERR
	   "EEH: PCI device at location=%s driver=%s pci addr=%s \n"
		"has failed %d times and has been permanently disabled. \n"
		"Please try reseating this device or replacing it.\n",
		location, drv_str, pci_str, frozen_pdn->eeh_freeze_count);
	goto perm_error;

hard_fail:
	printk(KERN_ERR
	   "EEH: Unable to recover from failure of PCI device "
	   "at location=%s driver=%s pci addr=%s \n"
	   "Please try reseating this device or replacing it.\n",
		location, drv_str, pci_str);

perm_error:
	eeh_slot_error_detail(frozen_pdn, 2 /* Permanent Error */);

	/* Notify all devices that they're about to go down. */
	pci_walk_bus(frozen_bus, eeh_report_failure, NULL);

	/* Shut down the device drivers for good. */
	pcibios_remove_pci_devices(frozen_bus);

	return NULL;
}
示例#7
0
struct eeh_dev *handle_eeh_events(struct eeh_event *event)
{
	struct device_node *frozen_dn;
	struct eeh_dev *frozen_edev;
	struct pci_bus *frozen_bus;
	int rc = 0;
	enum pci_ers_result result = PCI_ERS_RESULT_NONE;
	const char *location, *pci_str, *drv_str, *bus_pci_str, *bus_drv_str;

	frozen_dn = eeh_find_device_pe(eeh_dev_to_of_node(event->edev));
	if (!frozen_dn) {
		location = of_get_property(eeh_dev_to_of_node(event->edev), "ibm,loc-code", NULL);
		location = location ? location : "unknown";
		printk(KERN_ERR "EEH: Error: Cannot find partition endpoint "
		                "for location=%s pci addr=%s\n",
			location, eeh_pci_name(eeh_dev_to_pci_dev(event->edev)));
		return NULL;
	}

	frozen_bus = pcibios_find_pci_bus(frozen_dn);
	location = of_get_property(frozen_dn, "ibm,loc-code", NULL);
	location = location ? location : "unknown";

	if (!frozen_bus)
		frozen_bus = pcibios_find_pci_bus(frozen_dn->parent);

	if (!frozen_bus) {
		printk(KERN_ERR "EEH: Cannot find PCI bus "
		        "for location=%s dn=%s\n",
		        location, frozen_dn->full_name);
		return NULL;
	}

	frozen_edev = of_node_to_eeh_dev(frozen_dn);
	frozen_edev->freeze_count++;
	pci_str = eeh_pci_name(eeh_dev_to_pci_dev(event->edev));
	drv_str = eeh_pcid_name(eeh_dev_to_pci_dev(event->edev));

	if (frozen_edev->freeze_count > EEH_MAX_ALLOWED_FREEZES)
		goto excess_failures;

	printk(KERN_WARNING
	   "EEH: This PCI device has failed %d times in the last hour:\n",
		frozen_edev->freeze_count);

	if (frozen_edev->pdev) {
		bus_pci_str = pci_name(frozen_edev->pdev);
		bus_drv_str = eeh_pcid_name(frozen_edev->pdev);
		printk(KERN_WARNING
			"EEH: Bus location=%s driver=%s pci addr=%s\n",
			location, bus_drv_str, bus_pci_str);
	}

	printk(KERN_WARNING
		"EEH: Device location=%s driver=%s pci addr=%s\n",
		location, drv_str, pci_str);

	pci_walk_bus(frozen_bus, eeh_report_error, &result);

	rc = eeh_ops->wait_state(eeh_dev_to_of_node(frozen_edev), MAX_WAIT_FOR_RECOVERY*1000);
	if (rc < 0 || rc == EEH_STATE_NOT_SUPPORT) {
		printk(KERN_WARNING "EEH: Permanent failure\n");
		goto hard_fail;
	}

	eeh_slot_error_detail(frozen_edev, EEH_LOG_TEMP);

	if (result == PCI_ERS_RESULT_NONE) {
		rc = eeh_reset_device(frozen_edev, frozen_bus);
		if (rc) {
			printk(KERN_WARNING "EEH: Unable to reset, rc=%d\n", rc);
			goto hard_fail;
		}
	}

	
	if (result == PCI_ERS_RESULT_CAN_RECOVER) {
		rc = eeh_pci_enable(frozen_edev, EEH_OPT_THAW_MMIO);

		if (rc < 0)
			goto hard_fail;
		if (rc) {
			result = PCI_ERS_RESULT_NEED_RESET;
		} else {
			result = PCI_ERS_RESULT_NONE;
			pci_walk_bus(frozen_bus, eeh_report_mmio_enabled, &result);
		}
	}

	
	if (result == PCI_ERS_RESULT_CAN_RECOVER) {
		rc = eeh_pci_enable(frozen_edev, EEH_OPT_THAW_DMA);

		if (rc < 0)
			goto hard_fail;
		if (rc)
			result = PCI_ERS_RESULT_NEED_RESET;
		else
			result = PCI_ERS_RESULT_RECOVERED;
	}

	
	if (result == PCI_ERS_RESULT_DISCONNECT) {
		printk(KERN_WARNING "EEH: Device driver gave up\n");
		goto hard_fail;
	}

	
	if (result == PCI_ERS_RESULT_NEED_RESET) {
		rc = eeh_reset_device(frozen_edev, NULL);
		if (rc) {
			printk(KERN_WARNING "EEH: Cannot reset, rc=%d\n", rc);
			goto hard_fail;
		}
		result = PCI_ERS_RESULT_NONE;
		pci_walk_bus(frozen_bus, eeh_report_reset, &result);
	}

	
	if ((result != PCI_ERS_RESULT_RECOVERED) &&
	    (result != PCI_ERS_RESULT_NONE)) {
		printk(KERN_WARNING "EEH: Not recovered\n");
		goto hard_fail;
	}

	
	pci_walk_bus(frozen_bus, eeh_report_resume, NULL);

	return frozen_edev;
	
excess_failures:
	printk(KERN_ERR
	   "EEH: PCI device at location=%s driver=%s pci addr=%s\n"
		"has failed %d times in the last hour "
		"and has been permanently disabled.\n"
		"Please try reseating this device or replacing it.\n",
		location, drv_str, pci_str, frozen_edev->freeze_count);
	goto perm_error;

hard_fail:
	printk(KERN_ERR
	   "EEH: Unable to recover from failure of PCI device "
	   "at location=%s driver=%s pci addr=%s\n"
	   "Please try reseating this device or replacing it.\n",
		location, drv_str, pci_str);

perm_error:
	eeh_slot_error_detail(frozen_edev, EEH_LOG_PERM);

	
	pci_walk_bus(frozen_bus, eeh_report_failure, NULL);

	
	pcibios_remove_pci_devices(frozen_bus);

	return NULL;
}