linux-kernel - Re: [PATCH v2 49/61] mmc: sdhci-esdhc-mcf: Convert to platform remove callback returning void

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Message-ID: <CALJHbkDoBoqQ8BpJnqYhPyat=_A6gUHw6BZRnhT=sy4XSx265g@mail.gmail.com>
Date:   Wed, 26 Jul 2023 08:14:06 +0200
From:   Angelo Dureghello <angelo.dureghello@...esys.com>
To:     Yangtao Li <frank.li@...o.com>
Cc:     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 v2 49/61] mmc: sdhci-esdhc-mcf: Convert to platform remove
 callback returning void

Hi Yangtao,

Acked-by: Angelo Dureghello <angelo.dureghello@...esys.com>


On Wed, Jul 26, 2023 at 6:02 AM Yangtao Li <frank.li@...o.com> 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>
> Acked-by: Angelo Dureghello <angelo.dureghello@...esys.com>
> ---
>  drivers/mmc/host/sdhci-esdhc-mcf.c | 6 ++----
>  1 file changed, 2 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/mmc/host/sdhci-esdhc-mcf.c b/drivers/mmc/host/sdhci-esdhc-mcf.c
> index 05926bf5ecf9..a07f8333cd6b 100644
> --- a/drivers/mmc/host/sdhci-esdhc-mcf.c
> +++ b/drivers/mmc/host/sdhci-esdhc-mcf.c
> @@ -489,7 +489,7 @@ static int sdhci_esdhc_mcf_probe(struct platform_device *pdev)
>         return err;
>  }
>
> -static int sdhci_esdhc_mcf_remove(struct platform_device *pdev)
> +static void sdhci_esdhc_mcf_remove(struct platform_device *pdev)
>  {
>         struct sdhci_host *host = platform_get_drvdata(pdev);
>         struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
> @@ -502,8 +502,6 @@ static int sdhci_esdhc_mcf_remove(struct platform_device *pdev)
>         clk_disable_unprepare(mcf_data->clk_per);
>
>         sdhci_pltfm_free(pdev);
> -
> -       return 0;
>  }
>
>  static struct platform_driver sdhci_esdhc_mcf_driver = {
> @@ -512,7 +510,7 @@ static struct platform_driver sdhci_esdhc_mcf_driver = {
>                 .probe_type = PROBE_PREFER_ASYNCHRONOUS,
>         },
>         .probe = sdhci_esdhc_mcf_probe,
> -       .remove = sdhci_esdhc_mcf_remove,
> +       .remove_new = sdhci_esdhc_mcf_remove,
>  };
>
>  module_platform_driver(sdhci_esdhc_mcf_driver);
> --
> 2.39.0
>


-- 
Angelo Dureghello
Timesys
e. angelo.dureghello@...esys.com