[209/222] ACPI / scan: Do not use dummy HID for system bus ACPI nodes

Message ID 1358351822-7675-210-git-send-email-herton.krzesinski@canonical.com
State New
Headers show

Commit Message

Herton Ronaldo Krzesinski Jan. 16, 2013, 3:56 p.m. -stable review patch.  If anyone has any objections, please let me know.


From: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>

commit 4f5f64cf0cc916220aaa055992e31195470cfe37 upstream.

At one point acpi_device_set_id() checks if acpi_device_hid(device)
returns NULL, but that never happens, so system bus devices with an
empty list of PNP IDs are given the dummy HID ("device") instead of
the "system bus HID" ("LNXSYBUS").  Fix the code to use the right

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Herton Ronaldo Krzesinski <herton.krzesinski@canonical.com>
 drivers/acpi/scan.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)


diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index 803c4ec..fcae116 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -1162,7 +1162,7 @@  static void acpi_device_set_id(struct acpi_device *device)
 			acpi_add_id(device, ACPI_DOCK_HID);
 		else if (!acpi_ibm_smbus_match(device))
 			acpi_add_id(device, ACPI_SMBUS_IBM_HID);
-		else if (!acpi_device_hid(device) &&
+		else if (list_empty(&device->pnp.ids) &&
 			 ACPI_IS_ROOT_DEVICE(device->parent)) {
 			acpi_add_id(device, ACPI_BUS_HID); /* \_SB, LNXSYBUS */
 			strcpy(device->pnp.device_name, ACPI_BUS_DEVICE_NAME);