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