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| author | Bjorn Helgaas <bjorn.helgaas@hp.com> | 2010-03-24 10:44:33 -0600 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2010-04-03 23:32:07 -0400 |
| commit | b7b30de53aef6ce773d34837ba7d8422bd3baeec (patch) | |
| tree | e9a9b9665139c67ccb15b99951516819cb22b6b5 /drivers | |
| parent | 2eaa9cfdf33b8d7fb7aff27792192e0019ae8fc6 (diff) | |
| download | linux-b7b30de53aef6ce773d34837ba7d8422bd3baeec.tar.gz linux-b7b30de53aef6ce773d34837ba7d8422bd3baeec.tar.bz2 linux-b7b30de53aef6ce773d34837ba7d8422bd3baeec.zip | |
ACPI: use _HID when supplied by root-level devices
Previously, we assumed the only Device object immediately below the root
was the \_SB Scope (which the ACPI CA treats as a Device), so we forced
the HID of all such objects to ACPI_BUS_HID ("LNXSYBUS").
However, there are DSDTs that supply root-level Device objects with _HIDs.
This patch makes us pay attention to those _HIDs and only add the synthetic
ACPI_BUS_HID for root-level objects that do not supply their own _HID.
For example, this DSDT: https://bugzilla.kernel.org/show_bug.cgi?id=15605
contains:
Scope (_SB) {
...
}
Device (AMW0) {
Name (_HID, EisaId ("PNP0C14"))
...
}
and we should use "PNP0C14" for the AMW0 device, not "LNXSYBUS".
Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Acked-by: Zhang Rui <rui.zhang@intel.com>
Tested-by: Yong Wang <yong.y.wang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/acpi/scan.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c index 189cbc2585fa..95c90ff5b9a3 100644 --- a/drivers/acpi/scan.c +++ b/drivers/acpi/scan.c @@ -1080,12 +1080,6 @@ static void acpi_device_set_id(struct acpi_device *device) if (ACPI_IS_ROOT_DEVICE(device)) { acpi_add_id(device, ACPI_SYSTEM_HID); break; - } else if (ACPI_IS_ROOT_DEVICE(device->parent)) { - /* \_SB_, the only root-level namespace device */ - acpi_add_id(device, 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); @@ -1120,6 +1114,12 @@ 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) && + ACPI_IS_ROOT_DEVICE(device->parent)) { + acpi_add_id(device, ACPI_BUS_HID); /* \_SB, LNXSYBUS */ + strcpy(device->pnp.device_name, ACPI_BUS_DEVICE_NAME); + strcpy(device->pnp.device_class, ACPI_BUS_CLASS); + } break; case ACPI_BUS_TYPE_POWER: |