[PATCH next] ASoC: codecs: wcd-common: fix signedness bug in wcd_dt_parse_micbias_info()

[PATCH next] ASoC: codecs: wcd-common: fix signedness bug in wcd_dt_parse_micbias_info()

[Dan Carpenter]

The error handling does not work because common->micb_vout[] is an array
of u32.  We need a signed variable to store negative error codes.

Fixes: 4f16b6351bbf ("ASoC: codecs: wcd: add common helper for wcd codecs")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
---
 sound/soc/codecs/wcd-common.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/sound/soc/codecs/wcd-common.c b/sound/soc/codecs/wcd-common.c
index 9bbfda828377..9016e974582f 100644
--- a/sound/soc/codecs/wcd-common.c
+++ b/sound/soc/codecs/wcd-common.c
@@ -62,12 +62,13 @@ static int wcd_get_micbias_val(struct device *dev, int micb_num, u32 *micb_mv)
 
 int wcd_dt_parse_micbias_info(struct wcd_common *common)
 {
-	int i;
+	int ret, i;
 
 	for (i = 0; i < common->max_bias; i++) {
-		common->micb_vout[i] = wcd_get_micbias_val(common->dev, i + 1, &common->micb_mv[i]);
-		if (common->micb_vout[i] < 0)
-			return -EINVAL;
+		ret = wcd_get_micbias_val(common->dev, i + 1, &common->micb_mv[i]);
+		if (ret < 0)
+			return ret;
+		common->micb_vout[i] = ret;
 	}
 
 	return 0;
-- 
2.51.0

Re: [PATCH next] ASoC: codecs: wcd-common: fix signedness bug in wcd_dt_parse_micbias_info()

[Srinivas Kandagatla]

On 9/23/25 12:28 PM, Dan Carpenter wrote:
> The error handling does not work because common->micb_vout[] is an array
> of u32.  We need a signed variable to store negative error codes.
> 
> Fixes: 4f16b6351bbf ("ASoC: codecs: wcd: add common helper for wcd codecs")
> Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
> ---

Thanks Dan for fixing this,

Reviewed-by: Srinivas Kandagatla <srinivas.kandagatla@oss.qualcomm.com>

--srini
>  sound/soc/codecs/wcd-common.c | 9 +++++----
>  1 file changed, 5 insertions(+), 4 deletions(-)
> 
> diff --git a/sound/soc/codecs/wcd-common.c b/sound/soc/codecs/wcd-common.c
> index 9bbfda828377..9016e974582f 100644
> --- a/sound/soc/codecs/wcd-common.c
> +++ b/sound/soc/codecs/wcd-common.c
> @@ -62,12 +62,13 @@ static int wcd_get_micbias_val(struct device *dev, int micb_num, u32 *micb_mv)
>  
>  int wcd_dt_parse_micbias_info(struct wcd_common *common)
>  {
> -	int i;
> +	int ret, i;
>  
>  	for (i = 0; i < common->max_bias; i++) {
> -		common->micb_vout[i] = wcd_get_micbias_val(common->dev, i + 1, &common->micb_mv[i]);
> -		if (common->micb_vout[i] < 0)
> -			return -EINVAL;
> +		ret = wcd_get_micbias_val(common->dev, i + 1, &common->micb_mv[i]);
> +		if (ret < 0)
> +			return ret;
> +		common->micb_vout[i] = ret;
>  	}
>  
>  	return 0;

Re: [PATCH next] ASoC: codecs: wcd-common: fix signedness bug in wcd_dt_parse_micbias_info()

[Mark Brown]

On Tue, 23 Sep 2025 14:28:39 +0300, Dan Carpenter wrote:
> The error handling does not work because common->micb_vout[] is an array
> of u32.  We need a signed variable to store negative error codes.
> 
> 

Applied to

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-next

Thanks!

[1/1] ASoC: codecs: wcd-common: fix signedness bug in wcd_dt_parse_micbias_info()
      commit: dc64b3d42cb361d4b39eb7cc73037fec52ef9676

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark