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SubjectRe: [PATCH 6/7] arch/powerpc/platforms/maple/setup.c: Add of_node_put to avoid memory leak
On Sun, Aug 29, 2010 at 11:52:45AM +0200, Julia Lawall wrote:
> Add a call to of_node_put in the error handling code following a call to
> of_find_node_by_path.
>
> The semantic match that finds this problem is as follows:
> (http://coccinelle.lip6.fr/)
>
> // <smpl>
> @r exists@
> local idexpression x;
> expression E,E1;
> statement S;
> @@
>
> *x =
> (of_find_node_by_path
> |of_find_node_by_name
> |of_find_node_by_phandle
> |of_get_parent
> |of_get_next_parent
> |of_get_next_child
> |of_find_compatible_node
> |of_match_node
> )(...);
> ...
> if (x == NULL) S
> <... when != x = E
> *if (...) {
> ... when != of_node_put(x)
> when != if (...) { ... of_node_put(x); ... }
> (
> return <+...x...+>;
> |
> * return ...;
> )
> }
> ...>
> of_node_put(x);
> // </smpl>
>
> Signed-off-by: Julia Lawall <julia@diku.dk>
>
> ---
> arch/powerpc/platforms/maple/setup.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/arch/powerpc/platforms/maple/setup.c b/arch/powerpc/platforms/maple/setup.c
> index 3fff8d9..fe34c3d 100644
> --- a/arch/powerpc/platforms/maple/setup.c
> +++ b/arch/powerpc/platforms/maple/setup.c
> @@ -358,6 +358,7 @@ static int __init maple_cpc925_edac_setup(void)
> model = (const unsigned char *)of_get_property(np, "model", NULL);
> if (!model) {
> printk(KERN_ERR "%s: Unabel to get model info\n", __func__);
> + of_node_put(np);

Acked-by: Grant Likely <grant.likely@secretlab.ca>

This patch should also fix the exact same problem after a call to
of_find_node_by_type() in the same function (line 370).

> return -ENODEV;
> }
>
>


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