linux-kernel - Re: [PATCH] ASoC: atmel_ssc_dai: Handle errors for clk

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Date:   Tue, 1 Mar 2022 12:18:32 +0100
From:   Alexandre Belloni <alexandre.belloni@...tlin.com>
To:     Jiasheng Jiang <jiasheng@...as.ac.cn>
Cc:     codrin.ciubotariu@...rochip.com, lgirdwood@...il.com,
        broonie@...nel.org, perex@...ex.cz, tiwai@...e.com,
        nicolas.ferre@...rochip.com, claudiu.beznea@...rochip.com,
        alsa-devel@...a-project.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ASoC: atmel_ssc_dai: Handle errors for clk_enable

On 01/03/2022 17:06:37+0800, Jiasheng Jiang wrote:
> As the potential failure of the clk_enable(),
> it should be better to check it and return error if fals.
> 

As I already replied to an earlier patch, this will never, ever fail,
this patch doesn't fix anything.

> Fixes: cbaadf0f90d6 ("ASoC: atmel_ssc_dai: refactor the startup and shutdown")
> Signed-off-by: Jiasheng Jiang <jiasheng@...as.ac.cn>
> ---
>  sound/soc/atmel/atmel_ssc_dai.c | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
> 
> diff --git a/sound/soc/atmel/atmel_ssc_dai.c b/sound/soc/atmel/atmel_ssc_dai.c
> index 26e2bc690d86..c1dea8d62416 100644
> --- a/sound/soc/atmel/atmel_ssc_dai.c
> +++ b/sound/soc/atmel/atmel_ssc_dai.c
> @@ -280,7 +280,10 @@ static int atmel_ssc_startup(struct snd_pcm_substream *substream,
>  
>  	/* Enable PMC peripheral clock for this SSC */
>  	pr_debug("atmel_ssc_dai: Starting clock\n");
> -	clk_enable(ssc_p->ssc->clk);
> +	ret = clk_enable(ssc_p->ssc->clk);
> +	if (ret)
> +		return ret;
> +
>  	ssc_p->mck_rate = clk_get_rate(ssc_p->ssc->clk);
>  
>  	/* Reset the SSC unless initialized to keep it in a clean state */
> -- 
> 2.25.1
> 

-- 
Alexandre Belloni, co-owner and COO, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com