diff mbox series

[58/97] usb: ehci-st: Convert to platform remove callback returning void

Message ID 20230517230239.187727-59-u.kleine-koenig@pengutronix.de (mailing list archive)
State New, archived
Headers show
Series None | expand

Commit Message

Uwe Kleine-König May 17, 2023, 11:02 p.m. UTC
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@pengutronix.de>
---
 drivers/usb/host/ehci-st.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

Comments

Patrice CHOTARD May 24, 2023, 6:02 a.m. UTC | #1
On 5/18/23 01:02, 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@pengutronix.de>
> ---
>  drivers/usb/host/ehci-st.c | 6 ++----
>  1 file changed, 2 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/usb/host/ehci-st.c b/drivers/usb/host/ehci-st.c
> index f731dc98c533..ee0976b815b4 100644
> --- a/drivers/usb/host/ehci-st.c
> +++ b/drivers/usb/host/ehci-st.c
> @@ -252,7 +252,7 @@ static int st_ehci_platform_probe(struct platform_device *dev)
>  	return err;
>  }
>  
> -static int st_ehci_platform_remove(struct platform_device *dev)
> +static void st_ehci_platform_remove(struct platform_device *dev)
>  {
>  	struct usb_hcd *hcd = platform_get_drvdata(dev);
>  	struct usb_ehci_pdata *pdata = dev_get_platdata(&dev->dev);
> @@ -271,8 +271,6 @@ static int st_ehci_platform_remove(struct platform_device *dev)
>  
>  	if (pdata == &ehci_platform_defaults)
>  		dev->dev.platform_data = NULL;
> -
> -	return 0;
>  }
>  
>  #ifdef CONFIG_PM_SLEEP
> @@ -328,7 +326,7 @@ MODULE_DEVICE_TABLE(of, st_ehci_ids);
>  
>  static struct platform_driver ehci_platform_driver = {
>  	.probe		= st_ehci_platform_probe,
> -	.remove		= st_ehci_platform_remove,
> +	.remove_new	= st_ehci_platform_remove,
>  	.shutdown	= usb_hcd_platform_shutdown,
>  	.driver		= {
>  		.name	= "st-ehci",

Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>

Thanks
Patrice
diff mbox series

Patch

diff --git a/drivers/usb/host/ehci-st.c b/drivers/usb/host/ehci-st.c
index f731dc98c533..ee0976b815b4 100644
--- a/drivers/usb/host/ehci-st.c
+++ b/drivers/usb/host/ehci-st.c
@@ -252,7 +252,7 @@  static int st_ehci_platform_probe(struct platform_device *dev)
 	return err;
 }
 
-static int st_ehci_platform_remove(struct platform_device *dev)
+static void st_ehci_platform_remove(struct platform_device *dev)
 {
 	struct usb_hcd *hcd = platform_get_drvdata(dev);
 	struct usb_ehci_pdata *pdata = dev_get_platdata(&dev->dev);
@@ -271,8 +271,6 @@  static int st_ehci_platform_remove(struct platform_device *dev)
 
 	if (pdata == &ehci_platform_defaults)
 		dev->dev.platform_data = NULL;
-
-	return 0;
 }
 
 #ifdef CONFIG_PM_SLEEP
@@ -328,7 +326,7 @@  MODULE_DEVICE_TABLE(of, st_ehci_ids);
 
 static struct platform_driver ehci_platform_driver = {
 	.probe		= st_ehci_platform_probe,
-	.remove		= st_ehci_platform_remove,
+	.remove_new	= st_ehci_platform_remove,
 	.shutdown	= usb_hcd_platform_shutdown,
 	.driver		= {
 		.name	= "st-ehci",