linux-kernel - [PATCH 3/5] regmap: Fix memory leak in regcache

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Date:	Mon, 14 Nov 2011 10:40:17 +0100
From:	Lars-Peter Clausen <lars@...afoo.de>
To:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
CC:	Dimitris Papastamos <dp@...nsource.wolfsonmicro.com>,
	<linux-kernel@...r.kernel.org>,
	Lars-Peter Clausen <lars@...afoo.de>
Subject: [PATCH 3/5] regmap: Fix memory leak in regcache_init error path

Make sure all allocated memory gets freed again in case initializing the cache
failed.

Signed-off-by: Lars-Peter Clausen <lars@...afoo.de>
---
 drivers/base/regmap/regcache.c |   11 ++++++++++-
 1 files changed, 10 insertions(+), 1 deletions(-)

diff --git a/drivers/base/regmap/regcache.c b/drivers/base/regmap/regcache.c
index 7944626..27fae58 100644
--- a/drivers/base/regmap/regcache.c
+++ b/drivers/base/regmap/regcache.c
@@ -144,9 +144,18 @@ int regcache_init(struct regmap *map)
 	if (map->cache_ops->init) {
 		dev_dbg(map->dev, "Initializing %s cache\n",
 			map->cache_ops->name);
-		return map->cache_ops->init(map);
+		ret = map->cache_ops->init(map);
+		if (ret)
+			goto err_free;
 	}
 	return 0;
+
+err_free:
+	kfree(map->reg_defaults);
+	if (map->cache_free)
+		kfree(map->reg_defaults_raw);
+
+	return ret;
 }
 
 void regcache_exit(struct regmap *map)
-- 
1.7.7.1


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