can: sja1000_platform: 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/20230512212725.143824-16-u.kleine-koenig@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

diff --git a/drivers/net/can/sja1000/sja1000_platform.c b/drivers/net/can/sja1000/sja1000_platform.c
index 6779d5357069f6df903160b19008fabc849333db..b4889b5746e558ef6be0fc89dbbbd4a32a586cb2 100644 (file)
--- a/drivers/net/can/sja1000/sja1000_platform.c
+++ b/drivers/net/can/sja1000/sja1000_platform.c
@@ -317,19 +317,17 @@ static int sp_probe(struct platform_device *pdev)
        return err;
 }
 
-static int sp_remove(struct platform_device *pdev)
+static void sp_remove(struct platform_device *pdev)
 {
        struct net_device *dev = platform_get_drvdata(pdev);
 
        unregister_sja1000dev(dev);
        free_sja1000dev(dev);
-
-       return 0;
 }
 
 static struct platform_driver sp_driver = {
        .probe = sp_probe,
-       .remove = sp_remove,
+       .remove_new = sp_remove,
        .driver = {
                .name = DRV_NAME,
                .of_match_table = sp_of_table,