usb: gadget/renesas_usbf: 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: Herve Codina <herve.codina@bootlin.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20230517230239.187727-41-u.kleine-koenig@pengutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 2 insertions, 4 deletions

diff --git a/drivers/usb/gadget/udc/renesas_usbf.c b/drivers/usb/gadget/udc/renesas_usbf.c
index 84ac9fe4ce7f..6cd0af83e91e 100644
--- a/drivers/usb/gadget/udc/renesas_usbf.c
+++ b/drivers/usb/gadget/udc/renesas_usbf.c
@@ -3361,15 +3361,13 @@ static int usbf_probe(struct platform_device *pdev)
 	return 0;
 }
 
-static int usbf_remove(struct platform_device *pdev)
+static void usbf_remove(struct platform_device *pdev)
 {
 	struct usbf_udc *udc = platform_get_drvdata(pdev);
 
 	usb_del_gadget_udc(&udc->gadget);
 
 	pm_runtime_put(&pdev->dev);
-
-	return 0;
 }
 
 static const struct of_device_id usbf_match[] = {
@@ -3385,7 +3383,7 @@ static struct platform_driver udc_driver = {
 		.of_match_table = usbf_match,
 	},
 	.probe          = usbf_probe,
-	.remove         = usbf_remove,
+	.remove_new     = usbf_remove,
 };
 
 module_platform_driver(udc_driver);