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| author | Brandon Philips <bphilips@suse.de> | 2007-09-27 20:55:28 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@infradead.org> | 2007-10-10 00:03:05 -0300 |
| commit | 00f98d0804c88c29bef81cb98c861f13c9b33f30 (patch) | |
| tree | 0ca7f4b912e31f49fe342a29558d14b8cf2d395c /drivers/media/video/videobuf-core.c | |
| parent | ba32bd95d431525ad2ffac97cadf9ee40b63939e (diff) | |
| download | op-kernel-dev-00f98d0804c88c29bef81cb98c861f13c9b33f30.zip op-kernel-dev-00f98d0804c88c29bef81cb98c861f13c9b33f30.tar.gz | |
V4L/DVB (6276): V4L: videobuf-core.c lock before streaming check
The reading/streaming fields are used for mutual exclusion of the queue and
should be protected by the queue lock.
Signed-off-by: Brandon Philips <bphilips@suse.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
http://thread.gmane.org/gmane.comp.video.video4linux/34978/focus=34981
Reviewed-by: Ricardo Cerqueira <v4l@cerqueira.org>
Diffstat (limited to 'drivers/media/video/videobuf-core.c')
| -rw-r--r-- | drivers/media/video/videobuf-core.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/media/video/videobuf-core.c b/drivers/media/video/videobuf-core.c index a27e114..ca67f80 100644 --- a/drivers/media/video/videobuf-core.c +++ b/drivers/media/video/videobuf-core.c @@ -289,16 +289,18 @@ int videobuf_reqbufs(struct videobuf_queue *q, return -EINVAL; } + mutex_lock(&q->lock); if (q->streaming) { dprintk(1,"reqbufs: streaming already exists\n"); - return -EBUSY; + retval = -EBUSY; + goto done; } if (!list_empty(&q->stream)) { dprintk(1,"reqbufs: stream running\n"); - return -EBUSY; + retval = -EBUSY; + goto done; } - mutex_lock(&q->lock); count = req->count; if (count > VIDEO_MAX_FRAME) count = VIDEO_MAX_FRAME; |
