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ACPI: work around duplicate name "VID" problem on T61

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This can only fix the problem that more than one video bus device
have the same AML name "VID".
ie. the proc I/F for the second "VID" video bus device is located under
/proc/acpi/video/VID1/...

As this is really rare and the ACPI proc I/F is a legacy feature that
we are planning to remove.
We won't provide a generic solution for this problem.

Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Zhang Rui 2007-08-25 02:23:31 -04:00 committed by Len Brown
parent 1a8f46100b
commit e6d9da1de0
1 changed files with 8 additions and 0 deletions
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8
drivers/acpi/video.c
View file

@ -1833,6 +1833,7 @@ static void acpi_video_device_notify(acpi_handle handle, u32 event, void *data)
return;
}
static int instance;
static int acpi_video_bus_add(struct acpi_device *device)
{
int result = 0;
@ -1847,6 +1848,13 @@ static int acpi_video_bus_add(struct acpi_device *device)
if (!video)
return -ENOMEM;
/* a hack to fix the duplicate name "VID" problem on T61 */
if (!strcmp(device->pnp.bus_id, "VID")) {
if (instance)
device->pnp.bus_id[3] = '0' + instance;
instance ++;
}
video->device = device;
strcpy(acpi_device_name(device), ACPI_VIDEO_BUS_NAME);
strcpy(acpi_device_class(device), ACPI_VIDEO_CLASS);