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Date:   Wed, 25 Oct 2023 15:30:30 +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>,
        linux-crypto@vger.kernel.org, linux-amlogic@lists.infradead.org,
        kernel@pengutronix.de
Subject: Re: [PATCH 05/42] crypto: amlogic-gxl-core - Convert to platform
 remove callback returning void
Message-ID: <ZTkYdqL6Vb07cCjo@Red>
References: <20231020075521.2121571-44-u.kleine-koenig@pengutronix.de>
 <20231020075521.2121571-49-u.kleine-koenig@pengutronix.de>
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In-Reply-To: <20231020075521.2121571-49-u.kleine-koenig@pengutronix.de>
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Le Fri, Oct 20, 2023 at 09:55:27AM +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/amlogic/amlogic-gxl-core.c | 5 ++---
>  1 file changed, 2 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/crypto/amlogic/amlogic-gxl-core.c b/drivers/crypto/amlogic/amlogic-gxl-core.c
> index da6dfe0f9ac3..f54ab0d0b1e8 100644
> --- a/drivers/crypto/amlogic/amlogic-gxl-core.c
> +++ b/drivers/crypto/amlogic/amlogic-gxl-core.c
> @@ -299,7 +299,7 @@ static int meson_crypto_probe(struct platform_device *pdev)
>  	return err;
>  }
>  
> -static int meson_crypto_remove(struct platform_device *pdev)
> +static void meson_crypto_remove(struct platform_device *pdev)
>  {
>  	struct meson_dev *mc = platform_get_drvdata(pdev);
>  
> @@ -312,7 +312,6 @@ static int meson_crypto_remove(struct platform_device *pdev)
>  	meson_free_chanlist(mc, MAXFLOW - 1);
>  
>  	clk_disable_unprepare(mc->busclk);
> -	return 0;
>  }
>  
>  static const struct of_device_id meson_crypto_of_match_table[] = {
> @@ -323,7 +322,7 @@ MODULE_DEVICE_TABLE(of, meson_crypto_of_match_table);
>  
>  static struct platform_driver meson_crypto_driver = {
>  	.probe		 = meson_crypto_probe,
> -	.remove		 = meson_crypto_remove,
> +	.remove_new	 = meson_crypto_remove,
>  	.driver		 = {
>  		.name		   = "gxl-crypto",
>  		.of_match_table	= meson_crypto_of_match_table,
> -- 
> 2.42.0
> 

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

Thanks