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Date:   Wed, 25 Oct 2023 15:31:09 +0200
From:   Corentin LABBE <clabbe@baylibre.com>
To:     Uwe =?iso-8859-1?Q?Kleine-K=F6nig?= 
        <u.kleine-koenig@pengutronix.de>
Cc:     Herbert Xu <herbert@gondor.apana.org.au>,
        "David S. Miller" <davem@davemloft.net>,
        Heiko Stuebner <heiko@sntech.de>, linux-crypto@vger.kernel.org,
        linux-arm-kernel@lists.infradead.org,
        linux-rockchip@lists.infradead.org, kernel@pengutronix.de
Subject: Re: [PATCH 34/42] crypto: rockchip/rk3288 - Convert to platform
 remove callback returning void
Message-ID: <ZTkYnTY7VxIaIUak@Red>
References: <20231020075521.2121571-44-u.kleine-koenig@pengutronix.de>
 <20231020075521.2121571-78-u.kleine-koenig@pengutronix.de>
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In-Reply-To: <20231020075521.2121571-78-u.kleine-koenig@pengutronix.de>
Precedence: bulk

Le Fri, Oct 20, 2023 at 09:55:56AM +0200, Uwe Kleine-K?nig a ?crit :
> 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-K?nig <u.kleine-koenig@pengutronix.de>
> ---
>  drivers/crypto/rockchip/rk3288_crypto.c | 5 ++---
>  1 file changed, 2 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/crypto/rockchip/rk3288_crypto.c b/drivers/crypto/rockchip/rk3288_crypto.c
> index 77d5705a5d96..70edf40bc523 100644
> --- a/drivers/crypto/rockchip/rk3288_crypto.c
> +++ b/drivers/crypto/rockchip/rk3288_crypto.c
> @@ -405,7 +405,7 @@ static int rk_crypto_probe(struct platform_device *pdev)
>  	return err;
>  }
>  
> -static int rk_crypto_remove(struct platform_device *pdev)
> +static void rk_crypto_remove(struct platform_device *pdev)
>  {
>  	struct rk_crypto_info *crypto_tmp = platform_get_drvdata(pdev);
>  	struct rk_crypto_info *first;
> @@ -424,12 +424,11 @@ static int rk_crypto_remove(struct platform_device *pdev)
>  	}
>  	rk_crypto_pm_exit(crypto_tmp);
>  	crypto_engine_exit(crypto_tmp->engine);
> -	return 0;
>  }
>  
>  static struct platform_driver crypto_driver = {
>  	.probe		= rk_crypto_probe,
> -	.remove		= rk_crypto_remove,
> +	.remove_new	= rk_crypto_remove,
>  	.driver		= {
>  		.name	= "rk3288-crypto",
>  		.pm		= &rk_crypto_pm_ops,
> -- 
> 2.42.0
> 

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

Thanks