usb: gadget/dummy_hcd: 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>
Link: https://lore.kernel.org/r/20230517230239.187727-30-u.kleine-koenig@pengutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/gadget/udc/dummy_hcd.c b/drivers/usb/gadget/udc/dummy_hcd.c
index 899ac9f9c2796116f5d744a459a6f80b69c36979..0953e1b5c030077eb171ec1d7303104fce3c2eaf 100644 (file)
--- a/drivers/usb/gadget/udc/dummy_hcd.c
+++ b/drivers/usb/gadget/udc/dummy_hcd.c
@@ -1108,13 +1108,12 @@ err_udc:
        return rc;
 }
 
-static int dummy_udc_remove(struct platform_device *pdev)
+static void dummy_udc_remove(struct platform_device *pdev)
 {
        struct dummy    *dum = platform_get_drvdata(pdev);
 
        device_remove_file(&dum->gadget.dev, &dev_attr_function);
        usb_del_gadget_udc(&dum->gadget);
-       return 0;
 }
 
 static void dummy_udc_pm(struct dummy *dum, struct dummy_hcd *dum_hcd,
@@ -1150,7 +1149,7 @@ static int dummy_udc_resume(struct platform_device *pdev)
 
 static struct platform_driver dummy_udc_driver = {
        .probe          = dummy_udc_probe,
-       .remove         = dummy_udc_remove,
+       .remove_new     = dummy_udc_remove,
        .suspend        = dummy_udc_suspend,
        .resume         = dummy_udc_resume,
        .driver         = {
@@ -2701,7 +2700,7 @@ put_usb2_hcd:
        return retval;
 }
 
-static int dummy_hcd_remove(struct platform_device *pdev)
+static void dummy_hcd_remove(struct platform_device *pdev)
 {
        struct dummy            *dum;
 
@@ -2717,8 +2716,6 @@ static int dummy_hcd_remove(struct platform_device *pdev)
 
        dum->hs_hcd = NULL;
        dum->ss_hcd = NULL;
-
-       return 0;
 }
 
 static int dummy_hcd_suspend(struct platform_device *pdev, pm_message_t state)
@@ -2753,7 +2750,7 @@ static int dummy_hcd_resume(struct platform_device *pdev)
 
 static struct platform_driver dummy_hcd_driver = {
        .probe          = dummy_hcd_probe,
-       .remove         = dummy_hcd_remove,
+       .remove_new     = dummy_hcd_remove,
        .suspend        = dummy_hcd_suspend,
        .resume         = dummy_hcd_resume,
        .driver         = {