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[media] v4l2: vb2: one more fix for REQBUFS()

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Return immediately if the target number of buffers is the same as
the current one and memory access type doesn't change.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Marek Szyprowski 2011-03-11 06:07:27 -03:00 committed by Mauro Carvalho Chehab
parent a9bb36aa0d
commit 31901a078a
1 changed files with 7 additions and 0 deletions
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7
drivers/media/video/videobuf2-core.c
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@ -488,6 +488,13 @@ int vb2_reqbufs(struct vb2_queue *q, struct v4l2_requestbuffers *req)
return -EINVAL;
}
/*
* If the same number of buffers and memory access method is requested
* then return immediately.
*/
if (q->memory == req->memory && req->count == q->num_buffers)
return 0;
if (req->count == 0 || q->num_buffers != 0 || q->memory != req->memory) {
/*
* We already have buffers allocated, so first check if they