From: Julia Lawall <julia@diku.dk>
Date: Sun, 29 Aug 2010 09:52:44 +0000 (+0200)
Subject: arch/powerpc/sysdev/qe_lib/qe.c: Add of_node_put to avoid memory leak
X-Git-Tag: v2.6.36-rc4~84^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5aac4d73dc234fe7be91679b547af2436d7f8d1e;p=pandora-kernel.git

arch/powerpc/sysdev/qe_lib/qe.c: Add of_node_put to avoid memory leak

Add a call to of_node_put in the error handling code following a call to
of_find_compatible_node.

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>
Acked-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
---

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