misc: atmel-ssc: 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>
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/45719fc31bb893bb9ab1450057e9cb7f399e9ee2.1708508896.git.u.kleine-koenig@pengutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/misc/atmel-ssc.c b/drivers/misc/atmel-ssc.c
index ee590c4a15379d2898b3cefc87afb260c6299fbd..6eac0f33591524f9b76ad912a3ceb1c62556fc48 100644 (file)
--- a/drivers/misc/atmel-ssc.c
+++ b/drivers/misc/atmel-ssc.c
@@ -251,7 +251,7 @@ static int ssc_probe(struct platform_device *pdev)
        return 0;
 }
 
-static int ssc_remove(struct platform_device *pdev)
+static void ssc_remove(struct platform_device *pdev)
 {
        struct ssc_device *ssc = platform_get_drvdata(pdev);
 
@@ -260,8 +260,6 @@ static int ssc_remove(struct platform_device *pdev)
        mutex_lock(&user_lock);
        list_del(&ssc->list);
        mutex_unlock(&user_lock);
-
-       return 0;
 }
 
 static struct platform_driver ssc_driver = {
@@ -271,7 +269,7 @@ static struct platform_driver ssc_driver = {
        },
        .id_table       = atmel_ssc_devtypes,
        .probe          = ssc_probe,
-       .remove         = ssc_remove,
+       .remove_new     = ssc_remove,
 };
 module_platform_driver(ssc_driver);