mtd: st_spi_fsm: 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>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Acked-by: Tudor Ambarus <tudor.ambarus@linaro.org>
Link: https://lore.kernel.org/linux-mtd/20231008200143.196369-9-u.kleine-koenig@pengutronix.de

diff --git a/drivers/mtd/devices/st_spi_fsm.c b/drivers/mtd/devices/st_spi_fsm.c
index 95530cbbb1e0d2d2444938ed7fb47dd8fcd03812..3268de5fc7802c73d45b499af341d41fda646a78 100644 (file)
--- a/drivers/mtd/devices/st_spi_fsm.c
+++ b/drivers/mtd/devices/st_spi_fsm.c
@@ -2097,13 +2097,11 @@ static int stfsm_probe(struct platform_device *pdev)
        return mtd_device_register(&fsm->mtd, NULL, 0);
 }
 
-static int stfsm_remove(struct platform_device *pdev)
+static void stfsm_remove(struct platform_device *pdev)
 {
        struct stfsm *fsm = platform_get_drvdata(pdev);
 
        WARN_ON(mtd_device_unregister(&fsm->mtd));
-
-       return 0;
 }
 
 #ifdef CONFIG_PM_SLEEP
@@ -2134,7 +2132,7 @@ MODULE_DEVICE_TABLE(of, stfsm_match);
 
 static struct platform_driver stfsm_driver = {
        .probe          = stfsm_probe,
-       .remove         = stfsm_remove,
+       .remove_new     = stfsm_remove,
        .driver         = {
                .name   = "st-spi-fsm",
                .of_match_table = stfsm_match,