The newly added rt5663 codec driver introduces a couple of warnings when built with -Wmaybe-uninitialized:
codecs/rt5663.c: In function 'rt5663_set_tdm_slot': codecs/rt5663.c:2680:2: error: 'reg' may be used uninitialized in this function [-Werror=maybe-uninitialized] codecs/rt5663.c: In function 'rt5663_set_dai_pll': codecs/rt5663.c:2556:12: error: 'shift' may be used uninitialized in this function [-Werror=maybe-uninitialized] codecs/rt5663.c:2596:2: error: 'mask' may be used uninitialized in this function [-Werror=maybe-uninitialized]
We can avoid those warnings by always returning an error from the switch() statements instead of falling through with an uninitialized variable when we hit an unexpected case.
Signed-off-by: Arnd Bergmann arnd@arndb.de Fixes: df7c52168ee1 ("ASoC: add rt5663 codec driver") --- sound/soc/codecs/rt5663.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/sound/soc/codecs/rt5663.c b/sound/soc/codecs/rt5663.c index 7963a2736a91..8078abcaf728 100644 --- a/sound/soc/codecs/rt5663.c +++ b/sound/soc/codecs/rt5663.c @@ -1831,6 +1831,7 @@ static int rt5663_i2s_use_asrc(struct snd_soc_dapm_widget *source, break; default: dev_err(codec->dev, "Unknown CODEC_TYPE\n"); + return 1; }
if (da_asrc_en || ad_asrc_en) @@ -2579,6 +2580,7 @@ static int rt5663_set_dai_pll(struct snd_soc_dai *dai, int pll_id, int source, break; default: dev_err(codec->dev, "Unknown CODEC_TYPE\n"); + return -EINVAL; }
switch (source) { @@ -2674,6 +2676,7 @@ static int rt5663_set_tdm_slot(struct snd_soc_dai *dai, unsigned int tx_mask, break; default: dev_err(codec->dev, "Unknown CODEC_TYPE\n"); + return -EINVAL; }
snd_soc_update_bits(codec, reg, RT5668_TDM_MODE_MASK |