for_each_child_of_node performs an of_node_get on each iteration, so a break out of the loop requires an of_node_put.
A simplified version of the semantic patch that fixes this problem is as follows (http://coccinelle.lip6.fr):
// <smpl> @@ expression root,e; local idexpression child; @@
for_each_child_of_node(root, child) { ... when != of_node_put(child) when != e = child ( return child; | + of_node_put(child); ? return ...; ) ... } // </smpl>
Signed-off-by: Julia Lawall Julia.Lawall@lip6.fr
--- drivers/gpu/host1x/bus.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/host1x/bus.c b/drivers/gpu/host1x/bus.c index 4a99c64..c1795a2 100644 --- a/drivers/gpu/host1x/bus.c +++ b/drivers/gpu/host1x/bus.c @@ -82,8 +82,10 @@ static int host1x_device_parse_dt(struct host1x_device *device, if (of_match_node(driver->subdevs, np) && of_device_is_available(np)) { err = host1x_subdev_add(device, np); - if (err < 0) + if (err < 0) { + of_node_put(np); return err; + } } }