From bd60e381fab88979c3312265d18bb635c314d242 Mon Sep 17 00:00:00 2001 From: Cai Zhiyong Date: Mon, 18 Nov 2013 20:21:49 +0800 Subject: 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 Reviewed-by: Geyslan G. Bem Signed-off-by: Mark Brown --- drivers/base/regmap/regmap.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c index 9c021d9cace0..9a36ac14b0b5 100644 --- a/drivers/base/regmap/regmap.c +++ b/drivers/base/regmap/regmap.c @@ -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; -- cgit v1.2.3