Hi Stephan,
On Friday 28 January 2011 03:04:33 Stephan Lachowsky wrote:
> 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.
Thanks for the patch. It's missing your Signed-off-by line, can I add it ?
> ---
> drivers/media/video/uvc/uvc_video.c | 14 +++++++++-----
> 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 5673d67..545c029 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) {
--
Regards,
Laurent Pinchart
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