mtd: powernv_flash: 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/20231008200143.196369-7-u.kleine-koenig@pengutronix.de

diff --git a/drivers/mtd/devices/powernv_flash.c b/drivers/mtd/devices/powernv_flash.c
index 36e060386e59dfee5225bb4d4df151d47778df5b..66044f4f5bade81e4cd8dcf698fa2500a13fbbf0 100644 (file)
--- a/drivers/mtd/devices/powernv_flash.c
+++ b/drivers/mtd/devices/powernv_flash.c
@@ -265,14 +265,12 @@ static int powernv_flash_probe(struct platform_device *pdev)
  *
  * Returns 0
  */
-static int powernv_flash_release(struct platform_device *pdev)
+static void powernv_flash_release(struct platform_device *pdev)
 {
        struct powernv_flash *data = dev_get_drvdata(&(pdev->dev));
 
        /* All resources should be freed automatically */
        WARN_ON(mtd_device_unregister(&data->mtd));
-
-       return 0;
 }
 
 static const struct of_device_id powernv_flash_match[] = {
@@ -285,7 +283,7 @@ static struct platform_driver powernv_flash_driver = {
                .name           = "powernv_flash",
                .of_match_table = powernv_flash_match,
        },
-       .remove         = powernv_flash_release,
+       .remove_new     = powernv_flash_release,
        .probe          = powernv_flash_probe,
 };