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ACPI / video: skip evaluating _DOD when it does not exist

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commit e34fbbac669de0b7fb7803929d0477f35f6e2833 upstream.

Some system supports hybrid graphics and its discrete VGA
does not have any connectors and therefore has no _DOD method.

Signed-off-by: Alex Hung <alex.hung@canonical.com>
Reviewed-by: Aaron Lu <aaron.lu@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Cc: Sumit Semwal <sumit.semwal@linaro.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Willy Tarreau <w@1wt.eu>
This commit is contained in:
Alex Hung
2016-05-27 15:47:06 +08:00
committed by Willy Tarreau
parent a4da2b00fd
commit 4bbe571cd9
1 changed files with 3 additions and 0 deletions
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drivers/acpi/video.c
+3
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@@ -1263,6 +1263,9 @@ static int acpi_video_device_enumerate(struct acpi_video_bus *video)
union acpi_object *dod = NULL;
union acpi_object *obj;
if (!video->cap._DOD)
return AE_NOT_EXIST;
status = acpi_evaluate_object(video->device->handle, "_DOD", NULL, &buffer);
if (!ACPI_SUCCESS(status)) {
ACPI_EXCEPTION((AE_INFO, status, "Evaluating _DOD"));