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V4L/DVB (10651): uvcvideo: Ignore empty bulk URBs

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Devices may send a zero-length packet to signal the end of a bulk payload. If
the payload size is a multiple of the URB size the zero-length packet will be
received by the URB completion handler. Handle this by ignoring all empty URBs.

Signed-off-by: Laurent Pinchart <laurent.pinchart@skynet.be>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Laurent Pinchart 2009-02-14 19:39:08 -03:00 committed by Mauro Carvalho Chehab
parent 72362422f3
commit c90e777976
1 changed files with 3 additions and 0 deletions
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3
drivers/media/video/uvc/uvc_video.c
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@ -540,6 +540,9 @@ static void uvc_video_decode_bulk(struct urb *urb,
u8 *mem;
int len, ret;
if (urb->actual_length == 0)
return;
mem = urb->transfer_buffer;
len = urb->actual_length;
video->bulk.payload_size += len;