From: Stephan Lachowsky Date: Fri, 28 Jan 2011 02:04:33 +0000 (-0300) Subject: [media] uvcvideo: Fix uvc_fixup_video_ctrl() format search X-Git-Tag: v2.6.39-rc1~86^2~88 X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=38a66824d96de8aeeb915e6f46f0d3fe55828eb1;p=karo-tx-linux.git [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 Cc: stable@kernel.org Signed-off-by: Mauro Carvalho Chehab --- 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) {