usb: gadget/r8a66597-udc: 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/20230517230239.187727-39-u.kleine-koenig@pengutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/gadget/udc/r8a66597-udc.c b/drivers/usb/gadget/udc/r8a66597-udc.c
index 38e4d6b..51b665f 100644 (file)
--- a/drivers/usb/gadget/udc/r8a66597-udc.c
+++ b/drivers/usb/gadget/udc/r8a66597-udc.c
@@ -1805,7 +1805,7 @@ static const struct usb_gadget_ops r8a66597_gadget_ops = {
        .set_selfpowered        = r8a66597_set_selfpowered,
 };
 
-static int r8a66597_remove(struct platform_device *pdev)
+static void r8a66597_remove(struct platform_device *pdev)
 {
        struct r8a66597         *r8a66597 = platform_get_drvdata(pdev);
 
@@ -1816,8 +1816,6 @@ static int r8a66597_remove(struct platform_device *pdev)
        if (r8a66597->pdata->on_chip) {
                clk_disable_unprepare(r8a66597->clk);
        }
-
-       return 0;
 }
 
 static void nop_completion(struct usb_ep *ep, struct usb_request *r)
@@ -1966,7 +1964,7 @@ clean_up2:
 
 /*-------------------------------------------------------------------------*/
 static struct platform_driver r8a66597_driver = {
-       .remove =       r8a66597_remove,
+       .remove_new =   r8a66597_remove,
        .driver         = {
                .name = udc_name,
        },