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[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 <laurent.pinchart@ideasonboard.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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@ -409,13 +409,6 @@ static int uvc_video_decode_start(struct uvc_streaming *stream,
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if (len < 2 || data[0] < 2 || data[0] > len)
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return -EINVAL;
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/* Skip payloads marked with the error bit ("error frames"). */
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if (data[1] & UVC_STREAM_ERR) {
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uvc_trace(UVC_TRACE_FRAME, "Dropping payload (error bit "
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"set).\n");
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return -ENODATA;
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}
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fid = data[1] & UVC_STREAM_FID;
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/* Increase the sequence number regardless of any buffer states, so
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@ -432,6 +425,13 @@ static int uvc_video_decode_start(struct uvc_streaming *stream,
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return -ENODATA;
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}
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/* Mark the buffer as bad if the error bit is set. */
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if (data[1] & UVC_STREAM_ERR) {
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uvc_trace(UVC_TRACE_FRAME, "Marking buffer as bad (error bit "
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"set).\n");
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buf->error = 1;
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}
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/* Synchronize to the input stream by waiting for the FID bit to be
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* toggled when the the buffer state is not UVC_BUF_STATE_ACTIVE.
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* stream->last_fid is initialized to -1, so the first isochronous
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