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| author |   Alex Hung <alex.hung@canonical.com> | 2016-05-27 15:47:06 +0800 |
|---|---|---|
| committer |   Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2016-06-22 02:00:04 +0200 |
| commit | e34fbbac669de0b7fb7803929d0477f35f6e2833 (patch) | |
| tree | c2829cf37683495abba357f28c936c7299922959 | |
| parent | ACPI / video: Thinkpad X201 Tablet needs video_detect_force_video (diff) | |
| download | linux-dev-e34fbbac669de0b7fb7803929d0477f35f6e2833.tar.xz linux-dev-e34fbbac669de0b7fb7803929d0477f35f6e2833.zip | |
ACPI / video: skip evaluating _DOD when it does not exist
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>
| -rw-r--r-- | drivers/acpi/acpi_video.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/acpi/acpi_video.c b/drivers/acpi/acpi_video.c index c1d138e128cb..c5557d070954 100644 --- a/drivers/acpi/acpi_video.c +++ b/drivers/acpi/acpi_video.c @@ -1246,6 +1246,9 @@ 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")); |