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| author | Marek Szyprowski <m.szyprowski@samsung.com> | 2011-10-12 13:09:53 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2011-11-08 08:59:33 -0200 |
| commit | 2c2dd6ac738d8a22def46e073fb7383cac8fa180 (patch) | |
| tree | edacdfe8a4392fca7caae99e2cd72368179bb118 | |
| parent | e836a1c078e230dd5a94bb086b186c2be3ec6a84 (diff) | |
| download | blackbird-op-linux-2c2dd6ac738d8a22def46e073fb7383cac8fa180.tar.gz blackbird-op-linux-2c2dd6ac738d8a22def46e073fb7383cac8fa180.zip | |
[media] media: vb2: add a check for uninitialized buffer
__buffer_in_use() might be called for empty/uninitialized buffer in the
following scenario: REQBUF(n, USER_PTR), QUERYBUF(). This patch fixes
kernel ops in such case.
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>
| -rw-r--r-- | drivers/media/video/videobuf2-core.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/media/video/videobuf2-core.c b/drivers/media/video/videobuf2-core.c index 979e544388cb..9bb92145ad5a 100644 --- a/drivers/media/video/videobuf2-core.c +++ b/drivers/media/video/videobuf2-core.c @@ -296,14 +296,14 @@ static bool __buffer_in_use(struct vb2_queue *q, struct vb2_buffer *vb) { unsigned int plane; for (plane = 0; plane < vb->num_planes; ++plane) { + void *mem_priv = vb->planes[plane].mem_priv; /* * If num_users() has not been provided, call_memop * will return 0, apparently nobody cares about this * case anyway. If num_users() returns more than 1, * we are not the only user of the plane's memory. */ - if (call_memop(q, plane, num_users, - vb->planes[plane].mem_priv) > 1) + if (mem_priv && call_memop(q, plane, num_users, mem_priv) > 1) return true; } return false; |
