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authorStephan Lachowsky <stephan.lachowsky@maxim-ic.com>2011-01-27 23:04:33 -0300
committerMauro Carvalho Chehab <mchehab@redhat.com>2011-03-22 06:51:05 -0300
commit38a66824d96de8aeeb915e6f46f0d3fe55828eb1 (patch)
treeef9943c22ecdb264afabe001f3151ca72bde06b5 /drivers/media
parent5db2c3ba4de8489a7a064bac463bb8af2c7a1ae4 (diff)
downloadblackbird-op-linux-38a66824d96de8aeeb915e6f46f0d3fe55828eb1.tar.gz
blackbird-op-linux-38a66824d96de8aeeb915e6f46f0d3fe55828eb1.zip
[media] uvcvideo: Fix uvc_fixup_video_ctrl() format search
The scheme used to index format in uvc_fixup_video_ctrl() is not robust: format index is based on descriptor ordering, which does not necessarily match bFormatIndex ordering. Searching for first matching format will prevent uvc_fixup_video_ctrl() from using the wrong format/frame to make adjustments. Signed-off-by: Stephan Lachowsky <stephan.lachowsky@maxim-ic.com> Cc: stable@kernel.org Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media')
-rw-r--r--drivers/media/video/uvc/uvc_video.c14
1 files changed, 9 insertions, 5 deletions
diff --git a/drivers/media/video/uvc/uvc_video.c b/drivers/media/video/uvc/uvc_video.c
index 5673d673504b..545c0294813d 100644
--- a/drivers/media/video/uvc/uvc_video.c
+++ b/drivers/media/video/uvc/uvc_video.c
@@ -89,15 +89,19 @@ int uvc_query_ctrl(struct uvc_device *dev, __u8 query, __u8 unit,
static void uvc_fixup_video_ctrl(struct uvc_streaming *stream,
struct uvc_streaming_control *ctrl)
{
- struct uvc_format *format;
+ struct uvc_format *format = NULL;
struct uvc_frame *frame = NULL;
unsigned int i;
- if (ctrl->bFormatIndex <= 0 ||
- ctrl->bFormatIndex > stream->nformats)
- return;
+ for (i = 0; i < stream->nformats; ++i) {
+ if (stream->format[i].index == ctrl->bFormatIndex) {
+ format = &stream->format[i];
+ break;
+ }
+ }
- format = &stream->format[ctrl->bFormatIndex - 1];
+ if (format == NULL)
+ return;
for (i = 0; i < format->nframes; ++i) {
if (format->frame[i].bFrameIndex == ctrl->bFrameIndex) {
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