There is no media_graph_walk_free(). media_graph_walk_cleanup() is used to release the resources. Signed-off-by: Miaoqian Lin <linmq006@gmail.com> Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>