Re: [PATCH v2 01/26] ASoC: codecs: sigmadsp: Use guard() for mutex locks

On Mon, Jul 27, 2026 at 04:40:21PM +0700, [email protected] wrote:
> From: bui duc phuc <[email protected]>
> 
> Clean up the code using guard() for mutex locks.
> Merely code refactoring, and no behavior change.
> 
> Signed-off-by: bui duc phuc <[email protected]>
> ---

Reviewed-by: Nuno Sá <[email protected]>

>  sound/soc/codecs/sigmadsp.c | 17 +++++++----------
>  1 file changed, 7 insertions(+), 10 deletions(-)
> 
> diff --git a/sound/soc/codecs/sigmadsp.c b/sound/soc/codecs/sigmadsp.c
> index 2e08fde3989c..b7dbeb237447 100644
> --- a/sound/soc/codecs/sigmadsp.c
> +++ b/sound/soc/codecs/sigmadsp.c
> @@ -5,6 +5,7 @@
>   * Copyright 2009-2014 Analog Devices Inc.
>   */
>  
> +#include <linux/cleanup.h>
>  #include <linux/crc32.h>
>  #include <linux/firmware.h>
>  #include <linux/kernel.h>
> @@ -135,7 +136,7 @@ static int sigmadsp_ctrl_put(struct snd_kcontrol *kcontrol,
>  	uint8_t *data;
>  	int ret = 0;
>  
> -	mutex_lock(&sigmadsp->lock);
> +	guard(mutex)(&sigmadsp->lock);
>  
>  	data = ucontrol->value.bytes.data;
>  
> @@ -148,8 +149,6 @@ static int sigmadsp_ctrl_put(struct snd_kcontrol *kcontrol,
>  			ctrl->cached = true;
>  	}
>  
> -	mutex_unlock(&sigmadsp->lock);
> -
>  	return ret;
>  }
>  
> @@ -160,7 +159,7 @@ static int sigmadsp_ctrl_get(struct snd_kcontrol *kcontrol,
>  	struct sigmadsp *sigmadsp = snd_kcontrol_chip(kcontrol);
>  	int ret = 0;
>  
> -	mutex_lock(&sigmadsp->lock);
> +	guard(mutex)(&sigmadsp->lock);
>  
>  	if (!ctrl->cached) {
>  		ret = sigmadsp_read(sigmadsp, ctrl->addr, ctrl->cache,
> @@ -174,8 +173,6 @@ static int sigmadsp_ctrl_get(struct snd_kcontrol *kcontrol,
>  			ctrl->num_bytes);
>  	}
>  
> -	mutex_unlock(&sigmadsp->lock);
> -
>  	return ret;
>  }
>  
> @@ -677,10 +674,10 @@ static void sigmadsp_activate_ctrl(struct sigmadsp *sigmadsp,
>  		return;
>  	changed = snd_ctl_activate_id(card, &ctrl->kcontrol->id, active);
>  	if (active && changed > 0) {
> -		mutex_lock(&sigmadsp->lock);
> -		if (ctrl->cached)
> -			sigmadsp_ctrl_write(sigmadsp, ctrl, ctrl->cache);
> -		mutex_unlock(&sigmadsp->lock);
> +		scoped_guard(mutex, &sigmadsp->lock) {
> +			if (ctrl->cached)
> +				sigmadsp_ctrl_write(sigmadsp, ctrl, ctrl->cache);
> +		}
>  	}
>  }
>  
> -- 
> 2.43.0
>