From: Xiubo Li Date: Fri, 11 Dec 2015 03:23:20 +0000 (+0800) Subject: regmap: cache: Move the num_reg_defaults check as early as possible X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=167f7066a637332b463adf3b87b2af1c1031591a;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git regmap: cache: Move the num_reg_defaults check as early as possible If the register defaults are provided by the driver without the number by mistake, it should just return an error with one promotion. This should be as early as possible, then there is no need to verify the register defaults' stride and the other code followed. Signed-off-by: Xiubo Li Signed-off-by: Mark Brown --- diff --git a/drivers/base/regmap/regcache.c b/drivers/base/regmap/regcache.c index 9436a0d4cf71..60aeaad7fb69 100644 --- a/drivers/base/regmap/regcache.c +++ b/drivers/base/regmap/regcache.c @@ -109,6 +109,12 @@ int regcache_init(struct regmap *map, const struct regmap_config *config) return 0; } + if (config->reg_defaults && !config->num_reg_defaults) { + dev_err(map->dev, + "Register defaults are set without the number!\n"); + return -EINVAL; + } + for (i = 0; i < config->num_reg_defaults; i++) if (config->reg_defaults[i].reg % map->reg_stride) return -EINVAL; @@ -142,8 +148,6 @@ int regcache_init(struct regmap *map, const struct regmap_config *config) * a copy of it. */ if (config->reg_defaults) { - if (!map->num_reg_defaults) - return -EINVAL; tmp_buf = kmemdup(config->reg_defaults, map->num_reg_defaults * sizeof(struct reg_default), GFP_KERNEL); if (!tmp_buf)