Commit 001cf504 authored Oct 22, 2015 by Julia Lawall Committed by Rob Herring Oct 22, 2015

of/overlay: add missing of_node_put

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>
Signed-off-by: Rob Herring <robh@kernel.org>

parent 7fad948a

drivers/of/overlay.c

+4 −1

Original line number	Diff line number	Diff line
		@@ -149,6 +149,7 @@ static int of_overlay_apply_one(struct of_overlay *ov,
		pr_err("%s: Failed to apply single node @%s/%s\n",
		__func__, target->full_name,
		child->name);
		of_node_put(child);
		return ret;
		}
		}
		@@ -417,9 +418,11 @@ static int overlay_subtree_check(struct device_node *tree,
		return 1;

		for_each_child_of_node(tree, child) {
		if (overlay_subtree_check(child, dn))
		if (overlay_subtree_check(child, dn)) {
		of_node_put(child);
		return 1;
		}
		}

		return 0;
		}