[PATCH] ASoC: tlv320adcx140: Fix warnings when using W=1

Dan Murphy
2020-05-26T17:54:08Z

Fix the warnings when using the W=1 compiler flag.

sound/soc/codecs/tlv320adcx140.c: In function ‘adcx140_reset’:
sound/soc/codecs/tlv320adcx140.c:570:6: warning: variable ‘ret’ set but not used [-Wunused-but-set-variable]
570 | int ret = 0;
| ^~~

This was set but only used in case where the reset GPIO is not defined.
Have the function return the value of ret.

sound/soc/codecs/tlv320adcx140.c: In function ‘adcx140_codec_probe’:
sound/soc/codecs/tlv320adcx140.c:778:18: warning: comparison of unsigned expression < 0 is always false [-Wtype-limits]
778 | if (bias_source < ADCX140_MIC_BIAS_VAL_VREF ||
| ^
sound/soc/codecs/tlv320adcx140.c:789:18: warning: comparison of unsigned expression < 0 is always false [-Wtype-limits]
789 | if (vref_source < ADCX140_MIC_BIAS_VREF_275V ||

This condition will not occur since if the dt property is not set then
the *_source variable is set to the default value. So there is no way
that *_source can be less then 0. Which is what each #define is set to.
The code just needs to make sure that the dt property is not out of the
upper bounds.

Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Dan Murphy <dmurphy@ti.com>
---
sound/soc/codecs/tlv320adcx140.c | 8 +++-----
1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/sound/soc/codecs/tlv320adcx140.c b/sound/soc/codecs/tlv320adcx140.c
index 472d759ba8a3..2fe0df3b7550 100644
--- a/sound/soc/codecs/tlv320adcx140.c
+++ b/sound/soc/codecs/tlv320adcx140.c
@@ -582,7 +582,7 @@ static int adcx140_reset(struct adcx140_priv *adcx140)
/* 8.4.2: wait >= 10 ms after entering sleep mode. */
usleep_range(10000, 100000);

- return 0;
+ return ret;
}

static int adcx140_hw_params(struct snd_pcm_substream *substream,
@@ -772,8 +772,7 @@ static int adcx140_codec_probe(struct snd_soc_component *component)
if (ret)
bias_source = ADCX140_MIC_BIAS_VAL_VREF;

- if (bias_source < ADCX140_MIC_BIAS_VAL_VREF ||
- bias_source > ADCX140_MIC_BIAS_VAL_AVDD) {
+ if (bias_source > ADCX140_MIC_BIAS_VAL_AVDD) {
dev_err(adcx140->dev, "Mic Bias source value is invalid\n");
return -EINVAL;
}
@@ -783,8 +782,7 @@ static int adcx140_codec_probe(struct snd_soc_component *component)
if (ret)
vref_source = ADCX140_MIC_BIAS_VREF_275V;

- if (vref_source < ADCX140_MIC_BIAS_VREF_275V ||
- vref_source > ADCX140_MIC_BIAS_VREF_1375V) {
+ if (vref_source > ADCX140_MIC_BIAS_VREF_1375V) {
dev_err(adcx140->dev, "Mic Bias source value is invalid\n");
return -EINVAL;
}
--
2.26.2