ACPI video: check cap._DDC flag before getting EDID
cap._DDC is defined but never used.
Check this flag now and don't try to get EDID for video output devices with this flag cleared.
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c
index 81766eb..177b4ddc 100644
--- a/drivers/acpi/video.c
+++ b/drivers/acpi/video.c
@@ -1275,6 +1275,9 @@
if (!video_device)
continue;
+ if (!video_device->cap._DDC)
+ continue;
+
if (type) {
switch (type) {
case ACPI_VIDEO_DISPLAY_CRT:
