[PATCH 6.1.y 1/2] iommu/mtk_iommu_v1: Convert to platform remove callback returning void

[Sasha Levin <sashal@kernel.org>]

From: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>

[ Upstream commit 85e1049e50da9409678fc247ebad4c019d68041f ]

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 (mostly) ignored
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.

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: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20230321084125.337021-9-u.kleine-koenig@pengutronix.de
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Stable-dep-of: 46207625c9f3 ("iommu/mediatek-v1: fix device leaks on probe()")
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/iommu/mtk_iommu_v1.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/iommu/mtk_iommu_v1.c b/drivers/iommu/mtk_iommu_v1.c
index 5dd06bcb507f..47334c3d41e6 100644
--- a/drivers/iommu/mtk_iommu_v1.c
+++ b/drivers/iommu/mtk_iommu_v1.c
@@ -706,7 +706,7 @@ static int mtk_iommu_v1_probe(struct platform_device *pdev)
 	return ret;
 }
 
-static int mtk_iommu_v1_remove(struct platform_device *pdev)
+static void mtk_iommu_v1_remove(struct platform_device *pdev)
 {
 	struct mtk_iommu_v1_data *data = platform_get_drvdata(pdev);
 
@@ -716,7 +716,6 @@ static int mtk_iommu_v1_remove(struct platform_device *pdev)
 	clk_disable_unprepare(data->bclk);
 	devm_free_irq(&pdev->dev, data->irq, data);
 	component_master_del(&pdev->dev, &mtk_iommu_v1_com_ops);
-	return 0;
 }
 
 static int __maybe_unused mtk_iommu_v1_suspend(struct device *dev)
@@ -755,7 +754,7 @@ static const struct dev_pm_ops mtk_iommu_v1_pm_ops = {
 
 static struct platform_driver mtk_iommu_v1_driver = {
 	.probe	= mtk_iommu_v1_probe,
-	.remove	= mtk_iommu_v1_remove,
+	.remove_new = mtk_iommu_v1_remove,
 	.driver	= {
 		.name = "mtk-iommu-v1",
 		.of_match_table = mtk_iommu_v1_of_ids,
-- 
2.51.0