usb: dwc3-keystone: 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>
Acked-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Link: https://lore.kernel.org/r/20230517230239.187727-17-u.kleine-koenig@pengutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/dwc3/dwc3-keystone.c b/drivers/usb/dwc3/dwc3-keystone.c
index 1317959..0a09aed 100644 (file)
--- a/drivers/usb/dwc3/dwc3-keystone.c
+++ b/drivers/usb/dwc3/dwc3-keystone.c
@@ -181,7 +181,7 @@ static int kdwc3_remove_core(struct device *dev, void *c)
        return 0;
 }
 
-static int kdwc3_remove(struct platform_device *pdev)
+static void kdwc3_remove(struct platform_device *pdev)
 {
        struct dwc3_keystone *kdwc = platform_get_drvdata(pdev);
        struct device_node *node = pdev->dev.of_node;
@@ -198,8 +198,6 @@ static int kdwc3_remove(struct platform_device *pdev)
        phy_pm_runtime_put_sync(kdwc->usb3_phy);
 
        platform_set_drvdata(pdev, NULL);
-
-       return 0;
 }
 
 static const struct of_device_id kdwc3_of_match[] = {
@@ -211,7 +209,7 @@ MODULE_DEVICE_TABLE(of, kdwc3_of_match);
 
 static struct platform_driver kdwc3_driver = {
        .probe          = kdwc3_probe,
-       .remove         = kdwc3_remove,
+       .remove_new     = kdwc3_remove,
        .driver         = {
                .name   = "keystone-dwc3",
                .of_match_table = kdwc3_of_match,