sbus: uctrl: 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>
Reviewed-by: Andreas Larsson <andreas@gaisler.com>
Signed-off-by: Andreas Larsson <andreas@gaisler.com>
Link: https://lore.kernel.org/r/59b07175ca590031ee28c11c5941384ab3603799.1709591118.git.u.kleine-koenig@pengutronix.de

diff --git a/drivers/sbus/char/uctrl.c b/drivers/sbus/char/uctrl.c
index 0660425e3a5a073aa2e19618d23b9c720721b240..cf15a4186d037da4a334bbb49358f02b9ee65486 100644 (file)
--- a/drivers/sbus/char/uctrl.c
+++ b/drivers/sbus/char/uctrl.c
@@ -399,7 +399,7 @@ out_free:
        goto out;
 }
 
-static int uctrl_remove(struct platform_device *op)
+static void uctrl_remove(struct platform_device *op)
 {
        struct uctrl_driver *p = dev_get_drvdata(&op->dev);
 
@@ -409,7 +409,6 @@ static int uctrl_remove(struct platform_device *op)
                of_iounmap(&op->resource[0], p->regs, resource_size(&op->resource[0]));
                kfree(p);
        }
-       return 0;
 }
 
 static const struct of_device_id uctrl_match[] = {
@@ -426,7 +425,7 @@ static struct platform_driver uctrl_driver = {
                .of_match_table = uctrl_match,
        },
        .probe          = uctrl_probe,
-       .remove         = uctrl_remove,
+       .remove_new     = uctrl_remove,
 };