linux-kernel - Re: [PATCH] iio: adc: stm32-dfsdm: Remove redundant null check before clk_disable

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Date:   Sun, 17 Jan 2021 12:34:42 +0000
From:   Jonathan Cameron <jic23@...nel.org>
To:     Xu Wang <vulab@...as.ac.cn>
Cc:     lars@...afoo.de, pmeerw@...erw.net, mcoquelin.stm32@...il.com,
        alexandre.torgue@...com, krzk@...nel.org,
        andy.shevchenko@...il.com, bobo.shaobowang@...wei.com,
        linux-stm32@...md-mailman.stormreply.com,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-iio@...r.kernel.org
Subject: Re: [PATCH] iio: adc: stm32-dfsdm: Remove redundant null check
 before clk_disable_unprepare

On Thu, 31 Dec 2020 08:53:22 +0000
Xu Wang <vulab@...as.ac.cn> wrote:

> ecause clk_disable_unprepare() already checked NULL clock parameter,
> so the additional check is unnecessary, just remove it.
> 
> Signed-off-by: Xu Wang <vulab@...as.ac.cn>
Applied to the togreg branch of iio.git and pushed out as testing for the
autobuilders to see if we missed anything.

thanks,

Jonathan

> ---
>  drivers/iio/adc/stm32-dfsdm-core.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/drivers/iio/adc/stm32-dfsdm-core.c b/drivers/iio/adc/stm32-dfsdm-core.c
> index 42a7377704a4..bb925a11c8ae 100644
> --- a/drivers/iio/adc/stm32-dfsdm-core.c
> +++ b/drivers/iio/adc/stm32-dfsdm-core.c
> @@ -117,8 +117,7 @@ static void stm32_dfsdm_clk_disable_unprepare(struct stm32_dfsdm *dfsdm)
>  {
>  	struct dfsdm_priv *priv = to_stm32_dfsdm_priv(dfsdm);
>  
> -	if (priv->aclk)
> -		clk_disable_unprepare(priv->aclk);
> +	clk_disable_unprepare(priv->aclk);
>  	clk_disable_unprepare(priv->clk);
>  }
>