From: Cai Zhiyong <caizhiy...@huawei.com>
Date: Mon, 18 Nov 2013 20:21:49 +0800
Subject: [PATCH] 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 <caizhiy...@huawei.com>
---
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 9c021d9..9a36ac1 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;
--
1.8.1.5
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