serial: sunsab: 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() will be 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/20231110152927.70601-46-u.kleine-koenig@pengutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/serial/sunsab.c b/drivers/tty/serial/sunsab.c
index 6aa51a6f8063074828b13757960db01151a4c9b0..ff557796b578119f45319ed9e1374ce47d4d7d71 100644 (file)
--- a/drivers/tty/serial/sunsab.c
+++ b/drivers/tty/serial/sunsab.c
@@ -1066,7 +1066,7 @@ out:
        return err;
 }
 
-static int sab_remove(struct platform_device *op)
+static void sab_remove(struct platform_device *op)
 {
        struct uart_sunsab_port *up = platform_get_drvdata(op);
 
@@ -1078,8 +1078,6 @@ static int sab_remove(struct platform_device *op)
        of_iounmap(&op->resource[0],
                   up[0].port.membase,
                   sizeof(union sab82532_async_regs));
-
-       return 0;
 }
 
 static const struct of_device_id sab_match[] = {
@@ -1100,7 +1098,7 @@ static struct platform_driver sab_driver = {
                .of_match_table = sab_match,
        },
        .probe          = sab_probe,
-       .remove         = sab_remove,
+       .remove_new     = sab_remove,
 };
 
 static int __init sunsab_init(void)