watchdog: advantechwdt: 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 (mostly) ignored
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.

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: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20230303213716.2123717-4-u.kleine-koenig@pengutronix.de
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>

diff --git a/drivers/watchdog/advantechwdt.c b/drivers/watchdog/advantechwdt.c
index 554fe85da50e83315e932aceeeda12a16b060c51..7a0acbc3e4ddaf3ec8a15e53b07d512a7edbb5fa 100644 (file)
--- a/drivers/watchdog/advantechwdt.c
+++ b/drivers/watchdog/advantechwdt.c
@@ -279,14 +279,12 @@ unreg_stop:
        goto out;
 }
 
-static int advwdt_remove(struct platform_device *dev)
+static void advwdt_remove(struct platform_device *dev)
 {
        misc_deregister(&advwdt_miscdev);
        release_region(wdt_start, 1);
        if (wdt_stop != wdt_start)
                release_region(wdt_stop, 1);
-
-       return 0;
 }
 
 static void advwdt_shutdown(struct platform_device *dev)
@@ -296,7 +294,7 @@ static void advwdt_shutdown(struct platform_device *dev)
 }
 
 static struct platform_driver advwdt_driver = {
-       .remove         = advwdt_remove,
+       .remove_new     = advwdt_remove,
        .shutdown       = advwdt_shutdown,
        .driver         = {
                .name   = DRV_NAME,