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V4L/DVB (11990): saa7134-video.c: fix the block bug

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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>
This commit is contained in:
figo.zhang 2009-05-07 23:31:02 -03:00 committed by Mauro Carvalho Chehab
parent 040d4cbfb3
commit d5709a0e3d
1 changed files with 1 additions and 0 deletions
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drivers/media/video/saa7134/saa7134-video.c
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@ -1057,6 +1057,7 @@ static int buffer_prepare(struct videobuf_queue *q,
buf->vb.field = field;
buf->fmt = fh->fmt;
buf->pt = &fh->pt_cap;
dev->video_q.curr = NULL;
err = videobuf_iolock(q,&buf->vb,&dev->ovbuf);
if (err)