mfd: sm501: 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/20231123165627.492259-15-u.kleine-koenig@pengutronix.de
Signed-off-by: Lee Jones <lee@kernel.org>

diff --git a/drivers/mfd/sm501.c b/drivers/mfd/sm501.c
index 28027982cf6939a277c15ca3bbca0c8077cf9ed3..b3592982a83b55f68948cfc54e499f2f9bd6e1c0 100644 (file)
--- a/drivers/mfd/sm501.c
+++ b/drivers/mfd/sm501.c
@@ -1667,7 +1667,7 @@ static void sm501_pci_remove(struct pci_dev *dev)
        pci_disable_device(dev);
 }
 
-static int sm501_plat_remove(struct platform_device *dev)
+static void sm501_plat_remove(struct platform_device *dev)
 {
        struct sm501_devdata *sm = platform_get_drvdata(dev);
 
@@ -1675,8 +1675,6 @@ static int sm501_plat_remove(struct platform_device *dev)
        iounmap(sm->regs);
 
        release_mem_region(sm->io_res->start, 0x100);
-
-       return 0;
 }
 
 static const struct pci_device_id sm501_pci_tbl[] = {
@@ -1707,7 +1705,7 @@ static struct platform_driver sm501_plat_driver = {
                .of_match_table = of_sm501_match_tbl,
        },
        .probe          = sm501_plat_probe,
-       .remove         = sm501_plat_remove,
+       .remove_new     = sm501_plat_remove,
        .suspend        = pm_sleep_ptr(sm501_plat_suspend),
        .resume         = pm_sleep_ptr(sm501_plat_resume),
 };