V4L/DVB (3827): Cx88-blackbird: clean up the buffers when closing the MPEG stream

This patch cleans up the buffer queue when the MPEG stream is closed,
preventing the message, 'cx8802_timeout'

Signed-off-by: Valentin Zagura <puthre@gmail.com>
Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

drivers/media/video/cx88/cx88-blackbird.c

@@ -1569,6 +1569,7 @@ static int mpeg_release(struct inode *inode, struct file *file)
 			BLACKBIRD_RAW_BITS_NONE
 		);
 
+	cx8802_cancel_buffers(fh->dev);
 	/* stop mpeg capture */
 	if (fh->mpegq.streaming)
 		videobuf_streamoff(&fh->mpegq);