From 3afedb95858bcc117b207a7c0a6767fe891bdfe9 Mon Sep 17 00:00:00 2001 From: Laurent Pinchart Date: Thu, 3 Nov 2011 07:24:34 -0300 Subject: [PATCH] [media] uvcvideo: Don't skip erroneous payloads Instead of skipping the payload completely, which would make the resulting image corrupted anyway, store the payload normally and mark the buffer as erroneous. If the no_drop module parameter is set to 1 the buffer will then be passed to userspace, and tt will then be up to the application to decide what to do with the buffer. Signed-off-by: Laurent Pinchart Signed-off-by: Mauro Carvalho Chehab --- drivers/media/video/uvc/uvc_video.c | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) diff --git a/drivers/media/video/uvc/uvc_video.c b/drivers/media/video/uvc/uvc_video.c index b953dae5205..a57f8134184 100644 --- a/drivers/media/video/uvc/uvc_video.c +++ b/drivers/media/video/uvc/uvc_video.c @@ -409,13 +409,6 @@ static int uvc_video_decode_start(struct uvc_streaming *stream, if (len < 2 || data[0] < 2 || data[0] > len) return -EINVAL; - /* Skip payloads marked with the error bit ("error frames"). */ - if (data[1] & UVC_STREAM_ERR) { - uvc_trace(UVC_TRACE_FRAME, "Dropping payload (error bit " - "set).\n"); - return -ENODATA; - } - fid = data[1] & UVC_STREAM_FID; /* Increase the sequence number regardless of any buffer states, so @@ -432,6 +425,13 @@ static int uvc_video_decode_start(struct uvc_streaming *stream, return -ENODATA; } + /* Mark the buffer as bad if the error bit is set. */ + if (data[1] & UVC_STREAM_ERR) { + uvc_trace(UVC_TRACE_FRAME, "Marking buffer as bad (error bit " + "set).\n"); + buf->error = 1; + } + /* Synchronize to the input stream by waiting for the FID bit to be * toggled when the the buffer state is not UVC_BUF_STATE_ACTIVE. * stream->last_fid is initialized to -1, so the first isochronous -- 2.39.5