regmap: Fix 'ret' would return an uninitialized value

This patch give a warning when calling regmap_register_patch with
parameter num_regs <= 0.

When the num_regs parameter is zero and krealloc doesn't fail,
then the code would return an uninitialized value. However,
calling this function with num_regs == 0, would be a waste as it
essentially does nothing.

Signed-off-by: Cai Zhiyong <caizhiyong@huawei.com>
Reviewed-by: Geyslan G. Bem <geyslan@gmail.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
This commit is contained in:
Cai Zhiyong 2013-11-18 20:21:49 +08:00 committed by Mark Brown
parent 6ce4eac1f6
commit bd60e381fa

View file

@ -2173,6 +2173,10 @@ int regmap_register_patch(struct regmap *map, const struct reg_default *regs,
int i, ret;
bool bypass;
if (WARN_ONCE(num_regs <= 0, "invalid registers number (%d)\n",
num_regs))
return 0;
map->lock(map->lock_arg);
bypass = map->cache_bypass;