linux-kernel - Re: [PATCH 01/12] ASoC: codecs: rt1308: do not store status in state container

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Date:   Wed, 17 May 2023 08:27:22 -0500
From:   Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Oder Chiou <oder_chiou@...ltek.com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>, alsa-devel@...a-project.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 01/12] ASoC: codecs: rt1308: do not store status in state
 container



On 5/17/23 06:14, Krzysztof Kozlowski wrote:
> Driver in its update status callback stores Soundwire device status in
> state container but it never uses it later.  Simplify the code a bit.
> 
> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>

Good cleanup, not sure why we added this internal status many moons ago.

There's already a slave->status that's updated in
drivers/soundwire/bus.c, fewer state variables are better and in this
case there's no reason to keep a value that could be stale.

For the series

Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>

> ---
>  sound/soc/codecs/rt1308-sdw.c | 5 +----
>  sound/soc/codecs/rt1308-sdw.h | 1 -
>  2 files changed, 1 insertion(+), 5 deletions(-)
> 
> diff --git a/sound/soc/codecs/rt1308-sdw.c b/sound/soc/codecs/rt1308-sdw.c
> index 1797af824f60..313e97c94532 100644
> --- a/sound/soc/codecs/rt1308-sdw.c
> +++ b/sound/soc/codecs/rt1308-sdw.c
> @@ -304,9 +304,6 @@ static int rt1308_update_status(struct sdw_slave *slave,
>  {
>  	struct  rt1308_sdw_priv *rt1308 = dev_get_drvdata(&slave->dev);
>  
> -	/* Update the status */
> -	rt1308->status = status;
> -
>  	if (status == SDW_SLAVE_UNATTACHED)
>  		rt1308->hw_init = false;
>  
> @@ -314,7 +311,7 @@ static int rt1308_update_status(struct sdw_slave *slave,
>  	 * Perform initialization only if slave status is present and
>  	 * hw_init flag is false
>  	 */
> -	if (rt1308->hw_init || rt1308->status != SDW_SLAVE_ATTACHED)
> +	if (rt1308->hw_init || status != SDW_SLAVE_ATTACHED)
>  		return 0;
>  
>  	/* perform I/O transfers required for Slave initialization */
> diff --git a/sound/soc/codecs/rt1308-sdw.h b/sound/soc/codecs/rt1308-sdw.h
> index 04ff18fa18e2..f816c73e247e 100644
> --- a/sound/soc/codecs/rt1308-sdw.h
> +++ b/sound/soc/codecs/rt1308-sdw.h
> @@ -159,7 +159,6 @@ struct rt1308_sdw_priv {
>  	struct snd_soc_component *component;
>  	struct regmap *regmap;
>  	struct sdw_slave *sdw_slave;
> -	enum sdw_slave_status status;
>  	struct sdw_bus_params params;
>  	bool hw_init;
>  	bool first_hw_init;