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[media] vb2: properly clean up PREPARED and QUEUED buffers

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If __reqbufs was called then existing buffers are freed. However, if that
happens without ever having started STREAMON, but if buffers have been queued,
then the buf_finish op is never called.

Add a call to __vb2_queue_cancel in __reqbufs so that these buffers are
cleaned up there as well.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
This commit is contained in:
Hans Verkuil 2014-02-28 12:49:18 -03:00 committed by Mauro Carvalho Chehab
parent b3379c6201
commit fb64dca805
1 changed files with 8 additions and 0 deletions
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8
drivers/media/v4l2-core/videobuf2-core.c
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@ -100,6 +100,8 @@ module_param(debug, int, 0644);
#define V4L2_BUFFER_OUT_FLAGS (V4L2_BUF_FLAG_PFRAME | V4L2_BUF_FLAG_BFRAME | \
V4L2_BUF_FLAG_KEYFRAME | V4L2_BUF_FLAG_TIMECODE)
static void __vb2_queue_cancel(struct vb2_queue *q);
/**
* __vb2_buf_mem_alloc() - allocate video memory for the given buffer
*/
@ -802,6 +804,12 @@ static int __reqbufs(struct vb2_queue *q, struct v4l2_requestbuffers *req)
return -EBUSY;
}
/*
* Call queue_cancel to clean up any buffers in the PREPARED or
* QUEUED state which is possible if buffers were prepared or
* queued without ever calling STREAMON.
*/
__vb2_queue_cancel(q);
ret = __vb2_queue_free(q, q->num_buffers);
if (ret)
return ret;