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[media] media: vb2: fix allocation failure check 

__vb2_queue_alloc function returns the number of successfully allocated
buffers. There is no point in checking if the returned value is negative.
If this function returns 0, videobuf2 should just return -ENOMEM to
userspace, because no driver can work without memory buffers.

Reported-by: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
CC: Pawel Osciak <pawel@osciak.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Marek Szyprowski 2011-06-28 08:29:02 -03:00 committed by Mauro Carvalho Chehab
parent afdea8bac5
commit 66072d4fa7
1 changed files with 3 additions and 3 deletions
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6
drivers/media/video/videobuf2-core.c
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@ -532,9 +532,9 @@ int vb2_reqbufs(struct vb2_queue *q, struct v4l2_requestbuffers *req)
/* Finally, allocate buffers and video memory */
ret = __vb2_queue_alloc(q, req->memory, num_buffers, num_planes,
plane_sizes);
if (ret < 0) {
dprintk(1, "Memory allocation failed with error: %d\n", ret);
return ret;
if (ret == 0) {
dprintk(1, "Memory allocation failed\n");
return -ENOMEM;
}
/*