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[media] uvcvideo: Remove buffers from the queues when freeing 

When freeing memory for the video buffers also remove them from the
irq & main queues.

This fixes an oops when doing the following:

open ("/dev/video", ..)
VIDIOC_REQBUFS
VIDIOC_QBUF
VIDIOC_REQBUFS
close ()

As the second VIDIOC_REQBUFS will cause the list entries of the buffers
to be cleared while they still hang around on the main and irc queues

Signed-off-by: Sjoerd Simons <sjoerd.simons@collabora.co.uk>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: stable@kernel.org
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Sjoerd Simons 2011-05-24 12:22:03 -03:00 committed by Mauro Carvalho Chehab
parent a96aa5342d
commit 8ca2c80b17
1 changed files with 2 additions and 0 deletions
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2
drivers/media/video/uvc/uvc_queue.c
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@ -104,6 +104,8 @@ static int __uvc_free_buffers(struct uvc_video_queue *queue)
}
if (queue->count) {
uvc_queue_cancel(queue, 0);
INIT_LIST_HEAD(&queue->mainqueue);
vfree(queue->mem);
queue->count = 0;
}