powerpc/eeh: Introduce eeh_set_channel_state()

To ease future refactoring, extract setting of the channel state
from the report functions out into their own functions. This increases
the amount of code that is identical across all of the report
functions.
Signed-off-by: Sam Bobroff <sbobroff@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

arch/powerpc/kernel/eeh_driver.c

@@ -205,6 +205,17 @@ static void *eeh_dev_save_state(struct eeh_dev *edev, void *userdata)
 	return NULL;
 }
 
+static void eeh_set_channel_state(struct eeh_pe *root, enum pci_channel_state s)
+{
+	struct eeh_pe *pe;
+	struct eeh_dev *edev, *tmp;
+
+	eeh_for_each_pe(root, pe)
+		eeh_pe_for_each_dev(pe, edev, tmp)
+			if (eeh_edev_actionable(edev))
+				edev->pdev->error_state = s;
+}
+
 /**
  * eeh_report_error - Report pci error to each device driver
  * @data: eeh device
@@ -224,7 +235,6 @@ static void *eeh_report_error(struct eeh_dev *edev, void *userdata)
 		return NULL;
 
 	device_lock(&dev->dev);
-	dev->error_state = pci_channel_io_frozen;
 
 	driver = eeh_pcid_get(dev);
 	if (!driver) goto out_no_dev;
@@ -307,7 +317,6 @@ static void *eeh_report_reset(struct eeh_dev *edev, void *userdata)
 		return NULL;
 
 	device_lock(&dev->dev);
-	dev->error_state = pci_channel_io_normal;
 
 	driver = eeh_pcid_get(dev);
 	if (!driver) goto out_no_dev;
@@ -377,7 +386,6 @@ static void *eeh_report_resume(struct eeh_dev *edev, void *userdata)
 		return NULL;
 
 	device_lock(&dev->dev);
-	dev->error_state = pci_channel_io_normal;
 
 	driver = eeh_pcid_get(dev);
 	if (!driver) goto out_no_dev;
@@ -801,6 +809,7 @@ void eeh_handle_normal_event(struct eeh_pe *pe)
 	 * hotplug for this case.
 	 */
 	pr_info("EEH: Notify device drivers to shutdown\n");
+	eeh_set_channel_state(pe, pci_channel_io_frozen);
 	eeh_pe_dev_traverse(pe, eeh_report_error, &result);
 	if ((pe->type & EEH_PE_PHB) &&
 	    result != PCI_ERS_RESULT_NONE &&
@@ -891,6 +900,7 @@ void eeh_handle_normal_event(struct eeh_pe *pe)
 		pr_info("EEH: Notify device drivers "
 			"the completion of reset\n");
 		result = PCI_ERS_RESULT_NONE;
+		eeh_set_channel_state(pe, pci_channel_io_normal);
 		eeh_pe_dev_traverse(pe, eeh_report_reset, &result);
 	}
 
@@ -912,6 +922,7 @@ void eeh_handle_normal_event(struct eeh_pe *pe)
 
 	/* Tell all device drivers that they can resume operations */
 	pr_info("EEH: Notify device driver to resume\n");
+	eeh_set_channel_state(pe, pci_channel_io_normal);
 	eeh_pe_dev_traverse(pe, eeh_report_resume, NULL);
 
 	pr_info("EEH: Recovery successful.\n");
@@ -930,6 +941,7 @@ void eeh_handle_normal_event(struct eeh_pe *pe)
 	eeh_slot_error_detail(pe, EEH_LOG_PERM);
 
 	/* Notify all devices that they're about to go down. */
+	eeh_set_channel_state(pe, pci_channel_io_perm_failure);
 	eeh_pe_dev_traverse(pe, eeh_report_failure, NULL);
 
 	/* Mark the PE to be removed permanently */
@@ -1039,6 +1051,7 @@ void eeh_handle_special_event(void)
 
 				/* Notify all devices to be down */
 				eeh_pe_state_clear(pe, EEH_PE_PRI_BUS);
+				eeh_set_channel_state(pe, pci_channel_io_perm_failure);
 				eeh_pe_dev_traverse(pe,
 					eeh_report_failure, NULL);
 				bus = eeh_pe_bus_get(phb_pe);