diff options
| author | Lars-Peter Clausen <lars@metafoo.de> | 2011-11-15 12:34:40 (GMT) |
|---|---|---|
| committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2011-11-15 19:22:59 (GMT) |
| commit | 462a185c5cea7063348003c1644b70a6f6780f01 (patch) | |
| tree | ea7bac0e1c53a745fc41e12142cadf6b334d42bf /drivers | |
| parent | bd061c78cabc28bb64ed79f784d24918b6bdb791 (diff) | |
| download | linux-462a185c5cea7063348003c1644b70a6f6780f01.tar.xz | |
regmap: Do not call regcache_exit from regcache_rbtree_init error path
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>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/base/regmap/regcache-rbtree.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/base/regmap/regcache-rbtree.c b/drivers/base/regmap/regcache-rbtree.c index e314984..e71320f 100644 --- a/drivers/base/regmap/regcache-rbtree.c +++ b/drivers/base/regmap/regcache-rbtree.c @@ -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; } |