linux-kernel - Re: [PATCH 06/15] memory: jz4780-nemc: Convert to platform remove callback returning void

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Message-ID: <11e0d8b13cc835d8f99046110842d6bc569ff7a8.camel@crapouillou.net>
Date: Sun, 17 Dec 2023 15:40:29 +0100
From: Paul Cercueil <paul@...pouillou.net>
To: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>, 
	Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc: kernel@...gutronix.de, linux-mips@...r.kernel.org, 
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 06/15] memory: jz4780-nemc: Convert to platform remove
 callback returning void

Hi,

Le dimanche 17 décembre 2023 à 15:29 +0100, 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@...gutronix.de>

Acked-by: Paul Cercueil <paul@...pouillou.net>

Cheers,
-Paul

> ---
>  drivers/memory/jz4780-nemc.c | 5 ++---
>  1 file changed, 2 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/memory/jz4780-nemc.c b/drivers/memory/jz4780-
> nemc.c
> index e5a93e7da15f..fb6db2ffe71b 100644
> --- a/drivers/memory/jz4780-nemc.c
> +++ b/drivers/memory/jz4780-nemc.c
> @@ -384,12 +384,11 @@ static int jz4780_nemc_probe(struct
> platform_device *pdev)
>  	return 0;
>  }
>  
> -static int jz4780_nemc_remove(struct platform_device *pdev)
> +static void jz4780_nemc_remove(struct platform_device *pdev)
>  {
>  	struct jz4780_nemc *nemc = platform_get_drvdata(pdev);
>  
>  	clk_disable_unprepare(nemc->clk);
> -	return 0;
>  }
>  
>  static const struct jz_soc_info jz4740_soc_info = {
> @@ -408,7 +407,7 @@ static const struct of_device_id
> jz4780_nemc_dt_match[] = {
>  
>  static struct platform_driver jz4780_nemc_driver = {
>  	.probe		= jz4780_nemc_probe,
> -	.remove		= jz4780_nemc_remove,
> +	.remove_new	= jz4780_nemc_remove,
>  	.driver	= {
>  		.name	= "jz4780-nemc",
>  		.of_match_table =
> of_match_ptr(jz4780_nemc_dt_match),