This is a note to let you know that I've just added the patch titled
ACPI / video: skip evaluating _DOD when it does not exist
to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
acpi-video-skip-evaluating-_dod-when-it-does-not-exist.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From e34fbbac669de0b7fb7803929d0477f35f6e2833 Mon Sep 17 00:00:00 2001
From: Alex Hung <alex.hung@xxxxxxxxxxxxx>
Date: Fri, 27 May 2016 15:47:06 +0800
Subject: ACPI / video: skip evaluating _DOD when it does not exist
From: Alex Hung <alex.hung@xxxxxxxxxxxxx>
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@xxxxxxxxxxxxx>
Reviewed-by: Aaron Lu <aaron.lu@xxxxxxxxx>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
Cc: Sumit Semwal <sumit.semwal@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
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"));
Patches currently in stable-queue which might be from alex.hung@xxxxxxxxxxxxx are
queue-4.4/acpi-video-skip-evaluating-_dod-when-it-does-not-exist.patch