Messages in this thread Patch in this message | ![/](/images/icornerl.gif) | | From | Greg Kroah-Hartman <> | Subject | [PATCH 4.4 07/30] ACPI / video: skip evaluating _DOD when it does not exist | Date | Fri, 24 Mar 2017 18:58:46 +0100 |
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4.4-stable review patch. If anyone has any objections, please let me know.
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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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- drivers/acpi/acpi_video.c | 3 +++ 1 file changed, 3 insertions(+)
--- a/drivers/acpi/acpi_video.c +++ b/drivers/acpi/acpi_video.c @@ -1211,6 +1211,9 @@ static int acpi_video_device_enumerate(s 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"));
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