linux-kernel - [PATCH 2/4] drm/mediatek: Convert to platform remove callback returning void

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Message-ID:  <4a64dfbfbcfdf9b7cd46bc8026223e69a4b453b4.1712681770.git.u.kleine-koenig@pengutronix.de>
Date: Tue,  9 Apr 2024 19:02:49 +0200
From: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
To: David Airlie <airlied@...il.com>,
	Daniel Vetter <daniel@...ll.ch>
Cc: Chun-Kuang Hu <chunkuang.hu@...nel.org>,
	Philipp Zabel <p.zabel@...gutronix.de>,
	Matthias Brugger <matthias.bgg@...il.com>,
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
	dri-devel@...ts.freedesktop.org,
	linux-mediatek@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org
Subject: [PATCH 2/4] drm/mediatek: 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@...gutronix.de>
---
 drivers/gpu/drm/mediatek/mtk_padding.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_padding.c b/drivers/gpu/drm/mediatek/mtk_padding.c
index 0d6451c149b6..9f92b720aaae 100644
--- a/drivers/gpu/drm/mediatek/mtk_padding.c
+++ b/drivers/gpu/drm/mediatek/mtk_padding.c
@@ -137,10 +137,9 @@ static int mtk_padding_probe(struct platform_device *pdev)
 	return 0;
 }
 
-static int mtk_padding_remove(struct platform_device *pdev)
+static void mtk_padding_remove(struct platform_device *pdev)
 {
 	component_del(&pdev->dev, &mtk_padding_component_ops);
-	return 0;
 }
 
 static const struct of_device_id mtk_padding_driver_dt_match[] = {
@@ -151,7 +150,7 @@ MODULE_DEVICE_TABLE(of, mtk_padding_driver_dt_match);
 
 struct platform_driver mtk_padding_driver = {
 	.probe		= mtk_padding_probe,
-	.remove		= mtk_padding_remove,
+	.remove_new	= mtk_padding_remove,
 	.driver		= {
 		.name	= "mediatek-disp-padding",
 		.owner	= THIS_MODULE,
-- 
2.43.0