Re: [Linux-stm32] [PATCH 12/13] irqchip/stm32-exti: Convert to platform remove callback returning void

[Antonio Borneo]

On Fri, 2023-12-22 at 23:50 +0100, 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@xxxxxxxxxxxxxx>

Reviewed-by: Antonio Borneo <antonio.borneo@xxxxxxxxxxx>

Regards,
Antonio

> ---
>  drivers/irqchip/irq-stm32-exti.c | 5 ++---
>  1 file changed, 2 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/irqchip/irq-stm32-exti.c b/drivers/irqchip/irq-stm32-exti.c
> index 971240e2e31b..c61a97caafc9 100644
> --- a/drivers/irqchip/irq-stm32-exti.c
> +++ b/drivers/irqchip/irq-stm32-exti.c
> @@ -898,10 +898,9 @@ static void stm32_exti_remove_irq(void *data)
>         irq_domain_remove(domain);
>  }
>  
> -static int stm32_exti_remove(struct platform_device *pdev)
> +static void stm32_exti_remove(struct platform_device *pdev)
>  {
>         stm32_exti_h_syscore_deinit();
> -       return 0;
>  }
>  
>  static int stm32_exti_probe(struct platform_device *pdev)
> @@ -991,7 +990,7 @@ MODULE_DEVICE_TABLE(of, stm32_exti_ids);
>  
>  static struct platform_driver stm32_exti_driver = {
>         .probe          = stm32_exti_probe,
> -       .remove         = stm32_exti_remove,
> +       .remove_new     = stm32_exti_remove,
>         .driver         = {
>                 .name   = "stm32_exti",
>                 .of_match_table = stm32_exti_ids,