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[media] uvcvideo: Reset the bytesused field when recycling an erroneous buffer

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Buffers marked as erroneous are recycled immediately by the driver if
the nodrop module parameter isn't set. The buffer payload size is reset
to 0, but the buffer bytesused field isn't. This results in the buffer
being immediately considered as complete, leading to an infinite loop in
interrupt context.

Fix the problem by resetting the bytesused field when recycling the
buffer.

Cc: <stable@vger.kernel.org>
Signed-off-by: Jayakrishnan Memana <jayakrishnan.memana@maxim-ic.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Jayakrishnan Memana 2012-07-15 10:54:03 -03:00 committed by Mauro Carvalho Chehab
parent 8762541f06
commit 8a3f0ede2b
1 changed files with 1 additions and 0 deletions
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1
drivers/media/video/uvc/uvc_queue.c
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@ -338,6 +338,7 @@ struct uvc_buffer *uvc_queue_next_buffer(struct uvc_video_queue *queue,
if ((queue->flags & UVC_QUEUE_DROP_CORRUPTED) && buf->error) {
buf->error = 0;
buf->state = UVC_BUF_STATE_QUEUED;
buf->bytesused = 0;
vb2_set_plane_payload(&buf->buf, 0, 0);
return buf;
}