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regmap: Do not call regcache_exit from regcache_rbtree_init error path

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Calling regcache_exit from regcache_rbtree_init is first of all a layering
violation and secondly will cause double frees. regcache_exit will free buffers
allocated by the core, but the core will also free the same buffers when the
cacheops init callback returns an error. Thus we end up with a double free.
Fix this by not calling regcache_exit but only free those buffers which, have
been allocated in this function.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Dimitris Papastamos <dp@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Lars-Peter Clausen 2011-11-15 13:34:40 +01:00 committed by Mark Brown
parent bd061c78ca
commit 462a185c5c
1 changed files with 2 additions and 1 deletions
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3
drivers/base/regmap/regcache-rbtree.c
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@ -17,6 +17,7 @@
static int regcache_rbtree_write(struct regmap *map, unsigned int reg,
unsigned int value);
static int regcache_rbtree_exit(struct regmap *map);
struct regcache_rbtree_node {
/* the actual rbtree node holding this block */
@ -149,7 +150,7 @@ static int regcache_rbtree_init(struct regmap *map)
return 0;
err:
regcache_exit(map);
regcache_rbtree_exit(map);
return ret;
}