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V4L/DVB (11990): saa7134-video.c: fix the block bug
when re-open or re-start (video_streamon), the q->curr would not be NULL in saa7134_buffer_queue(), and all the qbuf will add to q->queue list,no one to do activate to start DMA,and then no interrupt would happened,so it will be block. In VIDEOBUF_NEEDS_INIT state, initialize the curr pointer to be NULL in the buffer_prepare(). Signed-off-by: Figo.zhang <figo.zhang@kolorific.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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@ -1057,6 +1057,7 @@ static int buffer_prepare(struct videobuf_queue *q,
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buf->vb.field = field;
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buf->fmt = fh->fmt;
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buf->pt = &fh->pt_cap;
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dev->video_q.curr = NULL;
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err = videobuf_iolock(q,&buf->vb,&dev->ovbuf);
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if (err)
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