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V4L/DVB (5603): V4L: Prevent queueing queued buffers. 

videobuf_qbuf queues buffers to q->stream but does not properly check
the state of the buffer before queueing. It was possible to queue
buffers that already were in the queue.
Only buffers that are in states STATE_NEEDS_INIT and STATE_IDLE can be
queued.

Signed-off-by: Sakari Ailus <sakari.ailus@nokia.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
This commit is contained in:
Sakari Ailus 2007-05-04 12:19:59 -03:00 committed by Mauro Carvalho Chehab
parent 5ad5e4845b
commit 36a63ee34b
1 changed files with 1 additions and 3 deletions
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4
drivers/media/video/video-buf.c
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@ -702,9 +702,7 @@ videobuf_qbuf(struct videobuf_queue *q,
dprintk(1,"qbuf: memory type is wrong.\n");
goto done;
}
if (buf->state == STATE_QUEUED ||
buf->state == STATE_PREPARED ||
buf->state == STATE_ACTIVE) {
if (buf->state != STATE_NEEDS_INIT && buf->state != STATE_IDLE) {
dprintk(1,"qbuf: buffer is already queued or active.\n");
goto done;
}