[media] videobuf2-core: fill in length field for multiplanar buffers

length should be set to num_planes in __fill_v4l2_buffer(). That way the
caller knows how many planes there are in the buffer.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

diff --git a/drivers/media/v4l2-core/videobuf2-core.c b/drivers/media/v4l2-core/videobuf2-core.c
index 5a132b286894a5f54bdc00385bc9f09cce04aed7..432df119af278dd953a492fece76552a4c8d3e86 100644 (file)
--- a/drivers/media/v4l2-core/videobuf2-core.c
+++ b/drivers/media/v4l2-core/videobuf2-core.c
@@ -348,6 +348,7 @@ static void __fill_v4l2_buffer(struct vb2_buffer *vb, struct v4l2_buffer *b)
                 * Fill in plane-related data if userspace provided an array
                 * for it. The caller has already verified memory and size.
                 */
+               b->length = vb->num_planes;
                memcpy(b->m.planes, vb->v4l2_planes,
                        b->length * sizeof(struct v4l2_plane));
        } else {