linux-kernel - Re: [PATCH 51/58] mmc: sdhci-spear: Convert to platform remove callback returning void

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Message-ID: <20230713082410.tc3se6lr726hbeq6@vireshk-i7>
Date:   Thu, 13 Jul 2023 13:54:10 +0530
From:   Viresh Kumar <viresh.kumar@...aro.org>
To:     Yangtao Li <frank.li@...o.com>
Cc:     Viresh Kumar <vireshk@...nel.org>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>, linux-mmc@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 51/58] mmc: sdhci-spear: Convert to platform remove
 callback returning void

On 13-07-23, 16:08, Yangtao Li wrote:
> The .remove() callback for a platform driver returns an int which makes
> many driver authors wrongly assume it's possible to do error handling by
> returning an error code. However the value returned is (mostly) ignored
> and this typically results in resource leaks. To improve here there is a
> quest to make the remove callback return void. In the first step of this
> quest all drivers are converted to .remove_new() which already returns
> void.
> 
> Trivially convert this driver from always returning zero in the remove
> callback to the void returning variant.
> 
> Cc: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
> Signed-off-by: Yangtao Li <frank.li@...o.com>
> ---
>  drivers/mmc/host/sdhci-spear.c | 6 ++----
>  1 file changed, 2 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/mmc/host/sdhci-spear.c b/drivers/mmc/host/sdhci-spear.c
> index c79035727b20..ec6c7d8e3736 100644
> --- a/drivers/mmc/host/sdhci-spear.c
> +++ b/drivers/mmc/host/sdhci-spear.c
> @@ -117,7 +117,7 @@ static int sdhci_probe(struct platform_device *pdev)
>  	return ret;
>  }
>  
> -static int sdhci_remove(struct platform_device *pdev)
> +static void sdhci_remove(struct platform_device *pdev)
>  {
>  	struct sdhci_host *host = platform_get_drvdata(pdev);
>  	struct spear_sdhci *sdhci = sdhci_priv(host);
> @@ -131,8 +131,6 @@ static int sdhci_remove(struct platform_device *pdev)
>  	sdhci_remove_host(host, dead);
>  	clk_disable_unprepare(sdhci->clk);
>  	sdhci_free_host(host);
> -
> -	return 0;
>  }
>  
>  #ifdef CONFIG_PM_SLEEP
> @@ -186,7 +184,7 @@ static struct platform_driver sdhci_driver = {
>  		.of_match_table = of_match_ptr(sdhci_spear_id_table),
>  	},
>  	.probe		= sdhci_probe,
> -	.remove		= sdhci_remove,
> +	.remove_new	= sdhci_remove,
>  };
>  
>  module_platform_driver(sdhci_driver);

Acked-by: Viresh Kumar <viresh.kumar@...aro.org>

-- 
viresh