usb: ehci-platform: Convert to platform remove callback returning void

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>
Reviewed-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Link: https://lore.kernel.org/r/20230517230239.187727-55-u.kleine-koenig@pengutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/host/ehci-platform.c b/drivers/usb/host/ehci-platform.c
index fe497c876d76899bfde7535bc40447d0e4625d90..83bf56c9424fbd10f5ec9887f0ec06cfafc89299 100644 (file)
--- a/drivers/usb/host/ehci-platform.c
+++ b/drivers/usb/host/ehci-platform.c
@@ -400,7 +400,7 @@ err_put_clks:
        return err;
 }
 
-static int ehci_platform_remove(struct platform_device *dev)
+static void 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);
@@ -424,8 +424,6 @@ static int ehci_platform_remove(struct platform_device *dev)
 
        if (pdata == &ehci_platform_defaults)
                dev->dev.platform_data = NULL;
-
-       return 0;
 }
 
 static int __maybe_unused ehci_platform_suspend(struct device *dev)
@@ -511,7 +509,7 @@ static SIMPLE_DEV_PM_OPS(ehci_platform_pm_ops, ehci_platform_suspend,
 static struct platform_driver ehci_platform_driver = {
        .id_table       = ehci_platform_table,
        .probe          = ehci_platform_probe,
-       .remove         = ehci_platform_remove,
+       .remove_new     = ehci_platform_remove,
        .shutdown       = usb_hcd_platform_shutdown,
        .driver         = {
                .name   = "ehci-platform",