[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>
diff --git a/drivers/media/video/videobuf2-core.c b/drivers/media/video/videobuf2-core.c
index 979e544..9bb9214 100644
--- a/drivers/media/video/videobuf2-core.c
+++ b/drivers/media/video/videobuf2-core.c
@@ -296,14 +296,14 @@
{
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;