From ef94711a04027066c4ae77d3477a5a4e0ba0784f Mon Sep 17 00:00:00 2001 From: Akinobu Mita Date: Thu, 12 Oct 2017 12:04:44 -0400 Subject: [PATCH] media: xilinx-video: fix bad of_node_put() on endpoint error When iterating through all endpoints using of_graph_get_next_endpoint(), the refcount of the returned endpoint node is incremented and the refcount of the node which is passed as previous endpoint is decremented. So the caller doesn't need to call of_node_put() for each iterated node except for error exit paths. Otherwise we get "OF: ERROR: Bad of_node_put() on ..." messages. Cc: Hyun Kwon Signed-off-by: Akinobu Mita Reviewed-by: Laurent Pinchart Signed-off-by: Mauro Carvalho Chehab --- drivers/media/platform/xilinx/xilinx-vipp.c | 16 ++++------------ 1 file changed, 4 insertions(+), 12 deletions(-) diff --git a/drivers/media/platform/xilinx/xilinx-vipp.c b/drivers/media/platform/xilinx/xilinx-vipp.c index d881cf0..f4c3e48 100644 --- a/drivers/media/platform/xilinx/xilinx-vipp.c +++ b/drivers/media/platform/xilinx/xilinx-vipp.c @@ -76,20 +76,16 @@ static int xvip_graph_build_one(struct xvip_composite_device *xdev, struct xvip_graph_entity *ent; struct v4l2_fwnode_link link; struct device_node *ep = NULL; - struct device_node *next; int ret = 0; dev_dbg(xdev->dev, "creating links for entity %s\n", local->name); while (1) { /* Get the next endpoint and parse its link. */ - next = of_graph_get_next_endpoint(entity->node, ep); - if (next == NULL) + ep = of_graph_get_next_endpoint(entity->node, ep); + if (ep == NULL) break; - of_node_put(ep); - ep = next; - dev_dbg(xdev->dev, "processing endpoint %pOF\n", ep); ret = v4l2_fwnode_parse_link(of_fwnode_handle(ep), &link); @@ -200,7 +196,6 @@ static int xvip_graph_build_dma(struct xvip_composite_device *xdev) struct xvip_graph_entity *ent; struct v4l2_fwnode_link link; struct device_node *ep = NULL; - struct device_node *next; struct xvip_dma *dma; int ret = 0; @@ -208,13 +203,10 @@ static int xvip_graph_build_dma(struct xvip_composite_device *xdev) while (1) { /* Get the next endpoint and parse its link. */ - next = of_graph_get_next_endpoint(node, ep); - if (next == NULL) + ep = of_graph_get_next_endpoint(node, ep); + if (ep == NULL) break; - of_node_put(ep); - ep = next; - dev_dbg(xdev->dev, "processing endpoint %pOF\n", ep); ret = v4l2_fwnode_parse_link(of_fwnode_handle(ep), &link); -- 2.7.4