1 files changed, 36 insertions, 8 deletions

diff --git a/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c
index b98106c110e..42736e213f2 100644
--- a/drivers/pci/pci-acpi.c
+++ b/drivers/pci/pci-acpi.c
@@ -320,12 +320,33 @@ static int acpi_pci_find_root_bridge(struct device *dev, acpi_handle *handle)
 	return 0;
 }
 
-static void acpi_pci_wakeup_setup(struct device *dev)
+static void pci_acpi_setup(struct device *dev)
 {
-	struct acpi_device *adev = acpi_dev_pm_get_node(dev);
 	struct pci_dev *pci_dev = to_pci_dev(dev);
+	acpi_handle handle = ACPI_HANDLE(dev);
+	struct acpi_device *adev;
+	acpi_status status;
+	acpi_handle dummy;
 
-	if (!adev || !adev->wakeup.flags.valid)
+	/*
+	 * Evaluate and parse _PRT, if exists.  This code allows parsing of
+	 * _PRT objects within the scope of non-bridge devices.  Note that
+	 * _PRTs within the scope of a PCI bridge assume the bridge's
+	 * subordinate bus number.
+	 *
+	 * TBD: Can _PRTs exist within the scope of non-bridge PCI devices?
+	 */
+	status = acpi_get_handle(handle, METHOD_NAME__PRT, &dummy);
+	if (ACPI_SUCCESS(status)) {
+		unsigned char bus;
+
+		bus = pci_dev->subordinate ?
+			pci_dev->subordinate->number : pci_dev->bus->number;
+		acpi_pci_irq_add_prt(handle, pci_domain_nr(pci_dev->bus), bus);
+	}
+
+	acpi_power_resource_register_device(dev, handle);
+	if (acpi_bus_get_device(handle, &adev) || !adev->wakeup.flags.valid)
 		return;
 
 	device_set_wakeup_capable(dev, true);
@@ -336,23 +357,30 @@ static void acpi_pci_wakeup_setup(struct device *dev)
 		device_set_run_wake(dev, true);
 }
 
-static void acpi_pci_wakeup_cleanup(struct device *dev)
+static void pci_acpi_cleanup(struct device *dev)
 {
-	struct acpi_device *adev = acpi_dev_pm_get_node(dev);
+	struct pci_dev *pci_dev = to_pci_dev(dev);
+	acpi_handle handle = ACPI_HANDLE(dev);
+	struct acpi_device *adev;
 
-	if (adev && adev->wakeup.flags.valid) {
+	if (!acpi_bus_get_device(handle, &adev) && adev->wakeup.flags.valid) {
 		device_set_wakeup_capable(dev, false);
 		device_set_run_wake(dev, false);
 		pci_acpi_remove_pm_notifier(adev);
 	}
+	acpi_power_resource_unregister_device(dev, handle);
+
+	if (pci_dev->subordinate)
+		acpi_pci_irq_del_prt(pci_domain_nr(pci_dev->bus),
+				     pci_dev->subordinate->number);
 }
 
 static struct acpi_bus_type acpi_pci_bus = {
 	.bus = &pci_bus_type,
 	.find_device = acpi_pci_find_device,
 	.find_bridge = acpi_pci_find_root_bridge,
-	.setup = acpi_pci_wakeup_setup,
-	.cleanup = acpi_pci_wakeup_cleanup,
+	.setup = pci_acpi_setup,
+	.cleanup = pci_acpi_cleanup,
 };
 
 static int __init acpi_pci_init(void)