ASoC: max98373-sdw: add missing memory allocation check

We forgot to test that devm_kcalloc doesn't return NULL.

Fixes: 349dd23931d1 ('ASoC: max98373: don't access volatile registers in bias level off')
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>
Reviewed-by: Bard Liao <bard.liao@intel.com>
Link: https://lore.kernel.org/r/20210607222239.582139-2-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/codecs/max98373-sdw.c b/sound/soc/codecs/max98373-sdw.c
index d8c4766..e178fdb 100644 (file)
--- a/sound/soc/codecs/max98373-sdw.c
+++ b/sound/soc/codecs/max98373-sdw.c
@@ -786,6 +786,8 @@ static int max98373_init(struct sdw_slave *slave, struct regmap *regmap)
        max98373->cache = devm_kcalloc(dev, max98373->cache_num,
                                       sizeof(*max98373->cache),
                                       GFP_KERNEL);
+       if (!max98373->cache)
+               return -ENOMEM;
 
        for (i = 0; i < max98373->cache_num; i++)
                max98373->cache[i].reg = max98373_sdw_cache_reg[i];