Re: [PATCH 17/42] crypto: gemini/sl3516-ce - Convert to platform remove callback returning void

[Corentin LABBE <clabbe@baylibre.com>]

Le Fri, Oct 20, 2023 at 09:55:39AM +0200, Uwe Kleine-König a écrit :
> 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 ignored (apart
> from emitting a warning) 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. Eventually after all drivers
> are converted, .remove_new() will be renamed to .remove().
> 
> Trivially convert this driver from always returning zero in the remove
> callback to the void returning variant.
> 
> Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
> ---
>  drivers/crypto/gemini/sl3516-ce-core.c | 6 ++----
>  1 file changed, 2 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/crypto/gemini/sl3516-ce-core.c b/drivers/crypto/gemini/sl3516-ce-core.c
> index 0f43c6e39bb9..1d1a889599bb 100644
> --- a/drivers/crypto/gemini/sl3516-ce-core.c
> +++ b/drivers/crypto/gemini/sl3516-ce-core.c
> @@ -505,7 +505,7 @@ static int sl3516_ce_probe(struct platform_device *pdev)
>  	return err;
>  }
>  
> -static int sl3516_ce_remove(struct platform_device *pdev)
> +static void sl3516_ce_remove(struct platform_device *pdev)
>  {
>  	struct sl3516_ce_dev *ce = platform_get_drvdata(pdev);
>  
> @@ -518,8 +518,6 @@ static int sl3516_ce_remove(struct platform_device *pdev)
>  #ifdef CONFIG_CRYPTO_DEV_SL3516_DEBUG
>  	debugfs_remove_recursive(ce->dbgfs_dir);
>  #endif
> -
> -	return 0;
>  }
>  
>  static const struct of_device_id sl3516_ce_crypto_of_match_table[] = {
> @@ -530,7 +528,7 @@ MODULE_DEVICE_TABLE(of, sl3516_ce_crypto_of_match_table);
>  
>  static struct platform_driver sl3516_ce_driver = {
>  	.probe		 = sl3516_ce_probe,
> -	.remove		 = sl3516_ce_remove,
> +	.remove_new	 = sl3516_ce_remove,
>  	.driver		 = {
>  		.name		= "sl3516-crypto",
>  		.pm		= &sl3516_ce_pm_ops,
> -- 
> 2.42.0
> 

Acked-by: Corentin Labbe <clabbe@baylibre.com>

Thanks