linux-kernel - Re: [PATCH 01/27] thermal/drivers/amlogic: Convert to platform remove callback returning void

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Date:   Wed, 12 Jul 2023 12:05:27 +0200
From:   Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
To:     Yangtao Li <frank.li@...o.com>
Cc:     Guillaume La Roque <glaroque@...libre.com>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Amit Kucheria <amitk@...nel.org>,
        Zhang Rui <rui.zhang@...el.com>, linux-pm@...r.kernel.org,
        linux-amlogic@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 01/27] thermal/drivers/amlogic: Convert to platform
 remove callback returning void

On Wed, Jul 12, 2023 at 04:12:32PM +0800, Yangtao Li wrote:
> 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 (mostly) ignored
> 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.
> 
> Trivially convert this driver from always returning zero in the remove
> callback to the void returning variant.
> 
> Cc: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
> Signed-off-by: Yangtao Li <frank.li@...o.com>
> ---
>  drivers/thermal/amlogic_thermal.c | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/thermal/amlogic_thermal.c b/drivers/thermal/amlogic_thermal.c
> index 756b218880a7..a95c8959e5af 100644
> --- a/drivers/thermal/amlogic_thermal.c
> +++ b/drivers/thermal/amlogic_thermal.c
> @@ -293,11 +293,11 @@ static int amlogic_thermal_probe(struct platform_device *pdev)
>  	return ret;
>  }
>  
> -static int amlogic_thermal_remove(struct platform_device *pdev)
> +static void amlogic_thermal_remove(struct platform_device *pdev)
>  {
>  	struct amlogic_thermal *data = platform_get_drvdata(pdev);
>  
> -	return amlogic_thermal_disable(data);
> +	amlogic_thermal_disable(data);

I'd make amlogic_thermal_disable() return void, too.

Otherwise looks ok.

Best regards
Uwe

-- 
Pengutronix e.K.                           | Uwe Kleine-König            |
Industrial Linux Solutions                 | https://www.pengutronix.de/ |

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