linux-kernel - Re: [PATCH v3 09/13] ASoC: ti: omap-mcbsp-st: Remove set, but unused variable 'w'

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Date:   Wed, 8 Jul 2020 08:39:49 +0300
From:   Peter Ujfalusi <peter.ujfalusi@...com>
To:     Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
        <alsa-devel@...a-project.org>
CC:     <tiwai@...e.de>, <broonie@...nel.org>,
        Lee Jones <lee.jones@...aro.org>,
        Jarkko Nikula <jarkko.nikula@...mer.com>,
        Samuel Ortiz <samuel.ortiz@...ia.com>,
        <linux-omap@...r.kernel.org>, Liam Girdwood <lgirdwood@...il.com>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3 09/13] ASoC: ti: omap-mcbsp-st: Remove set, but unused
 variable 'w'



On 07/07/2020 22.06, Pierre-Louis Bossart wrote:
> From: Lee Jones <lee.jones@...aro.org>
> 
> Looks like 'w' has remained unchecked since the driver's inception.
> 
> Fixes the following W=1 kernel build warning(s):
> 
>  sound/soc/ti/omap-mcbsp-st.c: In function ‘omap_mcbsp_st_chgain’:
>  sound/soc/ti/omap-mcbsp-st.c:145:6: warning: variable ‘w’ set but not used [-Wunused-but-set-variable]
> 
> Peter suggested that the whole read can be removed, so that's
> been done too.

Thank you,

Acked-by: Peter Ujfalusi <peter.ujfalusi@...com>

> 
> Cc: Peter Ujfalusi <peter.ujfalusi@...com>
> Cc: Jarkko Nikula <jarkko.nikula@...mer.com>
> Cc: Samuel Ortiz <samuel.ortiz@...ia.com>
> Cc: linux-omap@...r.kernel.org
> Signed-off-by: Lee Jones <lee.jones@...aro.org>
> Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
> ---
>  sound/soc/ti/omap-mcbsp-st.c | 3 ---
>  1 file changed, 3 deletions(-)
> 
> diff --git a/sound/soc/ti/omap-mcbsp-st.c b/sound/soc/ti/omap-mcbsp-st.c
> index 5a32b54bbf3b..0bc7d26c660a 100644
> --- a/sound/soc/ti/omap-mcbsp-st.c
> +++ b/sound/soc/ti/omap-mcbsp-st.c
> @@ -142,11 +142,8 @@ static void omap_mcbsp_st_fir_write(struct omap_mcbsp *mcbsp, s16 *fir)
>  
>  static void omap_mcbsp_st_chgain(struct omap_mcbsp *mcbsp)
>  {
> -	u16 w;
>  	struct omap_mcbsp_st_data *st_data = mcbsp->st_data;
>  
> -	w = MCBSP_ST_READ(mcbsp, SSELCR);
> -
>  	MCBSP_ST_WRITE(mcbsp, SGAINCR, ST_CH0GAIN(st_data->ch0gain) |
>  		       ST_CH1GAIN(st_data->ch1gain));
>  }
> 

- Péter

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