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ACPI: fix synthetic HID for \_SB_ 

This makes \_SB_ show up as /sys/devices/LNXSYSTM:00/LNXSYBUS:00
rather than "device:00".  This has been broken for a loooong time
(at least since 2.6.13) because device->parent is an acpi_device
pointer, not a handle.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Bjorn Helgaas 2009-09-21 13:35:04 -06:00 committed by Len Brown
parent e3b87f8a9d
commit 78b8e141f8
1 changed files with 6 additions and 12 deletions
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18
drivers/acpi/scan.c
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@ -1100,6 +1100,12 @@ static void acpi_device_set_id(struct acpi_device *device)
if (ACPI_IS_ROOT_DEVICE(device)) {
hid = ACPI_SYSTEM_HID;
break;
} else if (ACPI_IS_ROOT_DEVICE(device->parent)) {
/* \_SB_, the only root-level namespace device */
hid = ACPI_BUS_HID;
strcpy(device->pnp.device_name, ACPI_BUS_DEVICE_NAME);
strcpy(device->pnp.device_class, ACPI_BUS_CLASS);
break;
}
status = acpi_get_object_info(device->handle, &info);
@ -1149,18 +1155,6 @@ static void acpi_device_set_id(struct acpi_device *device)
break;
}
/*
* \_SB
* ----
* Fix for the system root bus device -- the only root-level device.
*/
if (((acpi_handle)device->parent == ACPI_ROOT_OBJECT) &&
(device->device_type == ACPI_BUS_TYPE_DEVICE)) {
hid = ACPI_BUS_HID;
strcpy(device->pnp.device_name, ACPI_BUS_DEVICE_NAME);
strcpy(device->pnp.device_class, ACPI_BUS_CLASS);
}
if (hid) {
device->pnp.hardware_id = ACPI_ALLOCATE_ZEROED(strlen (hid) + 1);
if (device->pnp.hardware_id) {