drm/exynos: 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>
fix merge conflict and drop duplicated patch description.
Signed-off-by: Inki Dae <inki.dae@samsung.com>

1 files changed, 2 insertions, 4 deletions

diff --git a/drivers/gpu/drm/exynos/exynos_mixer.c b/drivers/gpu/drm/exynos/exynos_mixer.c
index b302392ff0d7..6822333fd0e6 100644
--- a/drivers/gpu/drm/exynos/exynos_mixer.c
+++ b/drivers/gpu/drm/exynos/exynos_mixer.c
@@ -1258,13 +1258,11 @@ static int mixer_probe(struct platform_device *pdev)
 	return ret;
 }
 
-static int mixer_remove(struct platform_device *pdev)
+static void mixer_remove(struct platform_device *pdev)
 {
 	pm_runtime_disable(&pdev->dev);
 
 	component_del(&pdev->dev, &mixer_component_ops);
-
-	return 0;
 }
 
 static int __maybe_unused exynos_mixer_suspend(struct device *dev)
@@ -1338,5 +1336,5 @@ struct platform_driver mixer_driver = {
 		.of_match_table = mixer_match_types,
 	},
 	.probe = mixer_probe,
-	.remove = mixer_remove,
+	.remove_new = mixer_remove,
 };