Commit 001cf504 authored by Julia Lawall's avatar Julia Lawall Committed by Rob Herring

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: default avatarJulia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: default avatarRob Herring <robh@kernel.org>
parent 7fad948a
...@@ -149,6 +149,7 @@ static int of_overlay_apply_one(struct of_overlay *ov, ...@@ -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", pr_err("%s: Failed to apply single node @%s/%s\n",
__func__, target->full_name, __func__, target->full_name,
child->name); child->name);
of_node_put(child);
return ret; return ret;
} }
} }
...@@ -417,8 +418,10 @@ static int overlay_subtree_check(struct device_node *tree, ...@@ -417,8 +418,10 @@ static int overlay_subtree_check(struct device_node *tree,
return 1; return 1;
for_each_child_of_node(tree, child) { 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 1;
}
} }
return 0; return 0;
......
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