Re: [PATCH] ASoC: rt721-sdca: Clean logically deadcode in rt721-sdca.c

[Shuah Khan]

On 10/8/24 11:41, Everest K.C. wrote:
> As the same condition was checked in inner and outer if
> statements. The code never reaches the inner else statement.

Looks like this file is only on next. Use next in the prefix
[PATCH-next]

How did you find this problem? Include it in the change log.

> Signed-off-by: Everest K.C. <everestkc@xxxxxxxxxxxxxxxx>
> ---
>   sound/soc/codecs/rt721-sdca.c | 10 +++-------
>   1 file changed, 3 insertions(+), 7 deletions(-)
>
> diff --git a/sound/soc/codecs/rt721-sdca.c b/sound/soc/codecs/rt721-sdca.c
> index 36056cb7a3ca..4fd26e490610 100644
> --- a/sound/soc/codecs/rt721-sdca.c
> +++ b/sound/soc/codecs/rt721-sdca.c
> @@ -611,13 +611,9 @@ static int rt721_sdca_dmic_set_gain_get(struct snd_kcontrol *kcontrol,
>   
>   		if (!adc_vol_flag) /* boost gain */
>   			ctl = regvalue / boost_step;
> -		else { /* ADC gain */
> -			if (adc_vol_flag)
> -				ctl = p->max - (((vol_max - regvalue) & 0xffff) / interval_offset);
> -			else
> -				ctl = p->max - (((0 - regvalue) & 0xffff) / interval_offset);
> -		}
> -
> +		else /* ADC gain */
> +			ctl = p->max - (((vol_max - regvalue) & 0xffff) / interval_offset);
> +
>   		ucontrol->value.integer.value[i] = ctl;
>   	}
>   

Looks reasonable to me. I don't see adc_vol_flag changing.
Possible copy error from sound/soc/codecs/rt722-sdca.c

Perhaps rt722-sdca.c came from sound/soc/codecs/rt712-sdca.c
in which the logic seems to be correct.

In any case, I will leave it to sound experts to comment whether this
patch is correct or not.

thanks,
-- Shuah