usb: gadget/fsl_qe_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>
Link: https://lore.kernel.org/r/20230517230239.187727-31-u.kleine-koenig@pengutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/gadget/udc/fsl_qe_udc.c b/drivers/usb/gadget/udc/fsl_qe_udc.c
index 3b1cc8fa30c830c980b9c8c3f021b142ebeb3327..9c5dc1c1a68ea889a8b5f0f2c40e8b69650ecbbc 100644 (file)
--- a/drivers/usb/gadget/udc/fsl_qe_udc.c
+++ b/drivers/usb/gadget/udc/fsl_qe_udc.c
@@ -2628,7 +2628,7 @@ static int qe_udc_resume(struct platform_device *dev)
 }
 #endif
 
-static int qe_udc_remove(struct platform_device *ofdev)
+static void qe_udc_remove(struct platform_device *ofdev)
 {
        struct qe_udc *udc = platform_get_drvdata(ofdev);
        struct qe_ep *ep;
@@ -2679,8 +2679,6 @@ static int qe_udc_remove(struct platform_device *ofdev)
 
        /* wait for release() of gadget.dev to free udc */
        wait_for_completion(&done);
-
-       return 0;
 }
 
 /*-------------------------------------------------------------------------*/
@@ -2708,7 +2706,7 @@ static struct platform_driver udc_driver = {
                .of_match_table = qe_udc_match,
        },
        .probe          = qe_udc_probe,
-       .remove         = qe_udc_remove,
+       .remove_new     = qe_udc_remove,
 #ifdef CONFIG_PM
        .suspend        = qe_udc_suspend,
        .resume         = qe_udc_resume,