commit: 38a66824d96de8aeeb915e6f46f0d3fe55828eb1 From: Stephan Lachowsky <[email protected]> Date: Thu, 27 Jan 2011 23:04:33 -0300 Subject: [PATCH] [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 <[email protected]> Cc: [email protected] Signed-off-by: Mauro Carvalho Chehab <[email protected]> --- 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) { _______________________________________________ stable mailing list [email protected] http://linux.kernel.org/mailman/listinfo/stable
