[PATCH 09/48] ACPI video: check cap._DDC flag before getting EDID

Len Brown
2011-01-12T10:20:08Z

From: Zhang Rui <rui.zhang@intel.com>

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>
---
drivers/acpi/video.c | 3 +++
1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c
index 81766eb..177b4dd 100644
--- a/drivers/acpi/video.c
+++ b/drivers/acpi/video.c
@@ -1275,6 +1275,9 @@ int acpi_video_get_edid(struct acpi_device *device, int type, int device_id,
if (!video_device)
continue;

+ if (!video_device->cap._DDC)
+ continue;
+
if (type) {
switch (type) {
case ACPI_VIDEO_DISPLAY_CRT:
--
1.7.4.rc1.7.g2cf08