PCI hotplug: acpiphp: assume device is in state D0 after powering on a slot.

Devices which do not support PCI configuration space based power
management may not otherwise be enabled.
Signed-off-by: NIan Campbell <ian.campbell@citrix.com>
Signed-off-by: NJesse Barnes <jbarnes@virtuousgeek.org>

drivers/pci/hotplug/acpiphp_glue.c

@@ -827,6 +827,13 @@ static int __ref enable_device(struct acpiphp_slot *slot)
 	acpiphp_set_hpp_values(bus);
 	acpiphp_set_acpi_region(slot);
 	pci_enable_bridges(bus);
+
+	list_for_each_entry(dev, &bus->devices, bus_list) {
+		/* Assume that newly added devices are powered on already. */
+		if (!dev->is_added)
+			dev->current_state = PCI_D0;
+	}
+
 	pci_bus_add_devices(bus);
 
 	list_for_each_entry(func, &slot->funcs, sibling) {