Re: [PATCH 19/97] usb: dwc3-omap: Convert to platform remove callback returning void

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On Thu, May 18, 2023, 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() is
> 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>
> ---
>  drivers/usb/dwc3/dwc3-omap.c | 6 ++----
>  1 file changed, 2 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/usb/dwc3/dwc3-omap.c b/drivers/usb/dwc3/dwc3-omap.c
> index efaf0db595f4..d5c77db4daa9 100644
> --- a/drivers/usb/dwc3/dwc3-omap.c
> +++ b/drivers/usb/dwc3/dwc3-omap.c
> @@ -534,7 +534,7 @@ static int dwc3_omap_probe(struct platform_device *pdev)
>  	return ret;
>  }
>  
> -static int dwc3_omap_remove(struct platform_device *pdev)
> +static void dwc3_omap_remove(struct platform_device *pdev)
>  {
>  	struct dwc3_omap	*omap = platform_get_drvdata(pdev);
>  
> @@ -543,8 +543,6 @@ static int dwc3_omap_remove(struct platform_device *pdev)
>  	of_platform_depopulate(omap->dev);
>  	pm_runtime_put_sync(&pdev->dev);
>  	pm_runtime_disable(&pdev->dev);
> -
> -	return 0;
>  }
>  
>  static const struct of_device_id of_dwc3_match[] = {
> @@ -611,7 +609,7 @@ static const struct dev_pm_ops dwc3_omap_dev_pm_ops = {
>  
>  static struct platform_driver dwc3_omap_driver = {
>  	.probe		= dwc3_omap_probe,
> -	.remove		= dwc3_omap_remove,
> +	.remove_new	= dwc3_omap_remove,
>  	.driver		= {
>  		.name	= "omap-dwc3",
>  		.of_match_table	= of_dwc3_match,
> -- 
> 2.39.2
> 

Acked-by: Thinh Nguyen <Thinh.Nguyen@xxxxxxxxxxxx>

Thanks,
Thinh




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