usb: ohci-sm501: 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/20230517230239.187727-74-u.kleine-koenig@pengutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/host/ohci-sm501.c b/drivers/usb/host/ohci-sm501.c
index f5de586454e333fbdf25a00fa639b8e8a344f7ef..0468eeb4fcfd91b8985676ed41fc7a90fa353d0e 100644 (file)
--- a/drivers/usb/host/ohci-sm501.c
+++ b/drivers/usb/host/ohci-sm501.c
@@ -185,7 +185,7 @@ err0:
        return retval;
 }
 
-static int ohci_hcd_sm501_drv_remove(struct platform_device *pdev)
+static void ohci_hcd_sm501_drv_remove(struct platform_device *pdev)
 {
        struct usb_hcd *hcd = platform_get_drvdata(pdev);
        struct resource *mem;
@@ -202,8 +202,6 @@ static int ohci_hcd_sm501_drv_remove(struct platform_device *pdev)
 
        sm501_modify_reg(pdev->dev.parent, SM501_IRQ_MASK, 0, 1 << 6);
        sm501_unit_power(pdev->dev.parent, SM501_GATE_USB_HOST, 0);
-
-       return 0;
 }
 
 /*-------------------------------------------------------------------------*/
@@ -255,7 +253,7 @@ static int ohci_sm501_resume(struct platform_device *pdev)
  */
 static struct platform_driver ohci_hcd_sm501_driver = {
        .probe          = ohci_hcd_sm501_drv_probe,
-       .remove         = ohci_hcd_sm501_drv_remove,
+       .remove_new     = ohci_hcd_sm501_drv_remove,
        .shutdown       = usb_hcd_platform_shutdown,
        .suspend        = ohci_sm501_suspend,
        .resume         = ohci_sm501_resume,