linux-kernel - [PATCH 14/40] soc/mediatek: mtk-devapc: Convert to platform remove callback returning void

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Date:   Mon, 25 Sep 2023 11:55:05 +0200
From:   Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>
To:     Matthias Brugger <matthias.bgg@...il.com>
Cc:     AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, kernel@...gutronix.de
Subject: [PATCH 14/40] soc/mediatek: mtk-devapc: 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/soc/mediatek/mtk-devapc.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/soc/mediatek/mtk-devapc.c b/drivers/soc/mediatek/mtk-devapc.c
index b28feb967540..56cc345552a4 100644
--- a/drivers/soc/mediatek/mtk-devapc.c
+++ b/drivers/soc/mediatek/mtk-devapc.c
@@ -292,18 +292,16 @@ static int mtk_devapc_probe(struct platform_device *pdev)
 	return 0;
 }

-static int mtk_devapc_remove(struct platform_device *pdev)
+static void mtk_devapc_remove(struct platform_device *pdev)
 {
 	struct mtk_devapc_context *ctx = platform_get_drvdata(pdev);

 	stop_devapc(ctx);
-
-	return 0;
 }

 static struct platform_driver mtk_devapc_driver = {
 	.probe = mtk_devapc_probe,
-	.remove = mtk_devapc_remove,
+	.remove_new = mtk_devapc_remove,
 	.driver = {
 		.name = "mtk-devapc",
 		.of_match_table = mtk_devapc_dt_match,
-- 
2.40.1