| From | Willy Tarreau <> | Subject | [PATCH 3.10 191/268] ACPI / video: skip evaluating _DOD when it does not exist | Date | Mon, 19 Jun 2017 20:31:30 +0200 |
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From: Alex Hung <alex.hung@canonical.com>
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> --- drivers/acpi/video.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c index 0dc9ff6..e3ecaf4 100644 --- a/drivers/acpi/video.c +++ b/drivers/acpi/video.c @@ -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")); -- 2.8.0.rc2.1.gbe9624a
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