Re: [PATCH 21/31] thermal: rcar: Convert to platform remove callback returning void

["Niklas Söderlund" <niklas.soderlund@ragnatech.se>]

On 2023-09-27 21:37:26 +0200, Uwe Kleine-König 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 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>

Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>

> ---
>  drivers/thermal/rcar_thermal.c | 6 ++----
>  1 file changed, 2 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/thermal/rcar_thermal.c b/drivers/thermal/rcar_thermal.c
> index 293f8dd9fe0a..feb848d595fa 100644
> --- a/drivers/thermal/rcar_thermal.c
> +++ b/drivers/thermal/rcar_thermal.c
> @@ -371,7 +371,7 @@ static irqreturn_t rcar_thermal_irq(int irq, void *data)
>  /*
>   *		platform functions
>   */
> -static int rcar_thermal_remove(struct platform_device *pdev)
> +static void rcar_thermal_remove(struct platform_device *pdev)
>  {
>  	struct rcar_thermal_common *common = platform_get_drvdata(pdev);
>  	struct device *dev = &pdev->dev;
> @@ -388,8 +388,6 @@ static int rcar_thermal_remove(struct platform_device *pdev)
>  
>  	pm_runtime_put(dev);
>  	pm_runtime_disable(dev);
> -
> -	return 0;
>  }
>  
>  static int rcar_thermal_probe(struct platform_device *pdev)
> @@ -581,7 +579,7 @@ static struct platform_driver rcar_thermal_driver = {
>  		.of_match_table = rcar_thermal_dt_ids,
>  	},
>  	.probe		= rcar_thermal_probe,
> -	.remove		= rcar_thermal_remove,
> +	.remove_new	= rcar_thermal_remove,
>  };
>  module_platform_driver(rcar_thermal_driver);
>  
> -- 
> 2.40.1
> 

-- 
Kind Regards,
Niklas Söderlund