The patch below does not apply to the 5.10-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.

Possible dependencies:

142e821f68cf ("iommu/mediatek-v1: Fix an error handling path in mtk_iommu_v1_probe()") ac304c070c54 ("iommu/mediatek-v1: Add error handle for mtk_iommu_probe")

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 142e821f68cf5da79ce722cb9c1323afae30e185 Mon Sep 17 00:00:00 2001 From: Christophe JAILLET christophe.jaillet@wanadoo.fr Date: Mon, 19 Dec 2022 19:06:22 +0100 Subject: [PATCH] iommu/mediatek-v1: Fix an error handling path in mtk_iommu_v1_probe()

A clk, prepared and enabled in mtk_iommu_v1_hw_init(), is not released in the error handling path of mtk_iommu_v1_probe().

Add the corresponding clk_disable_unprepare(), as already done in the remove function.

Fixes: b17336c55d89 ("iommu/mediatek: add support for mtk iommu generation one HW") Signed-off-by: Christophe JAILLET christophe.jaillet@wanadoo.fr Reviewed-by: Yong Wu yong.wu@mediatek.com Reviewed-by: AngeloGioacchino Del Regno angelogioacchino.delregno@collabora.com Reviewed-by: Matthias Brugger matthias.bgg@gmail.com Link: https://lore.kernel.org/r/593e7b7d97c6e064b29716b091a9d4fd122241fb.167147316... Signed-off-by: Joerg Roedel jroedel@suse.de

diff --git a/drivers/iommu/mtk_iommu_v1.c b/drivers/iommu/mtk_iommu_v1.c index 69682ee068d2..ca581ff1c769 100644 --- a/drivers/iommu/mtk_iommu_v1.c +++ b/drivers/iommu/mtk_iommu_v1.c @@ -683,7 +683,7 @@ static int mtk_iommu_v1_probe(struct platform_device *pdev) ret = iommu_device_sysfs_add(&data->iommu, &pdev->dev, NULL, dev_name(&pdev->dev)); if (ret) - return ret; + goto out_clk_unprepare;

ret = iommu_device_register(&data->iommu, &mtk_iommu_v1_ops, dev); if (ret) @@ -698,6 +698,8 @@ out_dev_unreg: iommu_device_unregister(&data->iommu); out_sysfs_remove: iommu_device_sysfs_remove(&data->iommu); +out_clk_unprepare: + clk_disable_unprepare(data->bclk); return ret; }