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of/unittest: 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>

Combine the puts into code at the end of the function, for conciseness.

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Rob Herring <robh@kernel.org>
This commit is contained in:
Julia Lawall 2015-10-22 11:02:50 +02:00 committed by Rob Herring
parent e300745a4c
commit 855ff2878e
1 changed files with 6 additions and 2 deletions
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8
drivers/of/unittest.c
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@ -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)