[PATCH 3/4] of/unittest: add missing of_node_put
From: Julia Lawall
Date: Thu Oct 22 2015 - 05:17:25 EST
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>
Combine the puts into code at the end of the function, for conciseness.
Signed-off-by: Julia Lawall <Julia.Lawall@xxxxxxx>
---
drivers/of/unittest.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/drivers/of/unittest.c b/drivers/of/unittest.c
index 9f71770..e16ea57 100644
--- a/drivers/of/unittest.c
+++ b/drivers/of/unittest.c
@@ -205,16 +205,20 @@ static int __init of_unittest_check_node_linkage(struct device_node *np)
if (child->parent != np) {
pr_err("Child node %s links to wrong parent %s\n",
child->name, np->name);
- return -EINVAL;
+ rc = -EINVAL;
+ goto put_child;
}
rc = of_unittest_check_node_linkage(child);
if (rc < 0)
- return rc;
+ goto put_child;
count += rc;
}
return count + 1;
+put_child:
+ of_node_put(child);
+ return rc;
}
static void __init of_unittest_check_tree_linkage(void)
--
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