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ASoC: cache: Fix possible ZERO_SIZE_PTR pointer dereferencing error.
Since we cannot make sure the 'reg_size' will always be none zero here, and then if 'reg_size' equals to zero, the kzalloc() will return ZERO_SIZE_PTR, which equals to ((void *)16). So this patch fix this with just doing the 'reg_size' zero check before calling kzalloc(). Signed-off-by: Xiubo Li <Li.Xiubo@freescale.com> Signed-off-by: Mark Brown <broonie@linaro.org>
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@ -72,6 +72,9 @@ int snd_soc_cache_init(struct snd_soc_codec *codec)
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reg_size = codec_drv->reg_cache_size * codec_drv->reg_word_size;
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if (!reg_size)
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return -EINVAL;
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mutex_init(&codec->cache_rw_mutex);
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dev_dbg(codec->dev, "ASoC: Initializing cache for %s codec\n",
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