linux-kernel - Re: [PATCH 4/5] mmc: sdhci-of-arasan: Obviously always return success in remove callback

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Message-ID: <c0a313ac-20b9-2d1a-4c10-9ba57c62ae95@intel.com>
Date:   Mon, 13 Jun 2022 10:13:16 +0300
From:   Adrian Hunter <adrian.hunter@...el.com>
To:     Uwe Kleine-König <u.kleine-koenig@...gutronix.de>,
        Michal Simek <michal.simek@...inx.com>,
        Ulf Hansson <ulf.hansson@...aro.org>
Cc:     kernel@...gutronix.de, linux-arm-kernel@...ts.infradead.org,
        linux-mmc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 4/5] mmc: sdhci-of-arasan: Obviously always return success
 in remove callback

On 11/06/22 00:12, Uwe Kleine-König wrote:
> sdhci_pltfm_unregister() returns 0 unconditionally and returning an
> error in a platform remove callback isn't very sensible. (The only
> effect of the latter is that the device core emits a generic warning and
> then removes the device anyhow.)
> 
> So return 0 unconditionally to make it obvious there is no error
> forwarded to the upper layers.
> 
> This is a preparation for making platform remove callbacks return void.

This preparation seems a bit unnatural.

> 
> Signed-off-by: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>

Acked-by: Adrian Hunter <adrian.hunter@...el.com>

> ---
>  drivers/mmc/host/sdhci-of-arasan.c | 5 ++---
>  1 file changed, 2 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/mmc/host/sdhci-of-arasan.c b/drivers/mmc/host/sdhci-of-arasan.c
> index 757801dfc308..3997cad1f793 100644
> --- a/drivers/mmc/host/sdhci-of-arasan.c
> +++ b/drivers/mmc/host/sdhci-of-arasan.c
> @@ -1733,7 +1733,6 @@ static int sdhci_arasan_probe(struct platform_device *pdev)
>  
>  static int sdhci_arasan_remove(struct platform_device *pdev)
>  {
> -	int ret;
>  	struct sdhci_host *host = platform_get_drvdata(pdev);
>  	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
>  	struct sdhci_arasan_data *sdhci_arasan = sdhci_pltfm_priv(pltfm_host);
> @@ -1747,11 +1746,11 @@ static int sdhci_arasan_remove(struct platform_device *pdev)
>  
>  	sdhci_arasan_unregister_sdclk(&pdev->dev);
>  
> -	ret = sdhci_pltfm_unregister(pdev);
> +	sdhci_pltfm_unregister(pdev);
>  
>  	clk_disable_unprepare(clk_ahb);
>  
> -	return ret;
> +	return 0;
>  }
>  
>  static struct platform_driver sdhci_arasan_driver = {