This is a note to let you know that I've just added the patch titled iommu/mediatek-v1: Add error handle for mtk_iommu_probe to the 5.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: iommu-mediatek-v1-add-error-handle-for-mtk_iommu_pro.patch and it can be found in the queue-5.4 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit 0ede8e0168cb1b1f8d143552d0d0f284b38f3b7c Author: Yong Wu <yong.wu@xxxxxxxxxxxx> Date: Mon Apr 12 14:48:43 2021 +0800 iommu/mediatek-v1: Add error handle for mtk_iommu_probe [ Upstream commit ac304c070c54413efabf29f9e73c54576d329774 ] In the original code, we lack the error handle. This patch adds them. Signed-off-by: Yong Wu <yong.wu@xxxxxxxxxxxx> Link: https://lore.kernel.org/r/20210412064843.11614-2-yong.wu@xxxxxxxxxxxx Signed-off-by: Joerg Roedel <jroedel@xxxxxxx> Stable-dep-of: 142e821f68cf ("iommu/mediatek-v1: Fix an error handling path in mtk_iommu_v1_probe()") Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/iommu/mtk_iommu_v1.c b/drivers/iommu/mtk_iommu_v1.c index b5efd6dac953..7b1833b0f059 100644 --- a/drivers/iommu/mtk_iommu_v1.c +++ b/drivers/iommu/mtk_iommu_v1.c @@ -632,12 +632,26 @@ static int mtk_iommu_probe(struct platform_device *pdev) ret = iommu_device_register(&data->iommu); if (ret) - return ret; + goto out_sysfs_remove; - if (!iommu_present(&platform_bus_type)) - bus_set_iommu(&platform_bus_type, &mtk_iommu_ops); + if (!iommu_present(&platform_bus_type)) { + ret = bus_set_iommu(&platform_bus_type, &mtk_iommu_ops); + if (ret) + goto out_dev_unreg; + } - return component_master_add_with_match(dev, &mtk_iommu_com_ops, match); + ret = component_master_add_with_match(dev, &mtk_iommu_com_ops, match); + if (ret) + goto out_bus_set_null; + return ret; + +out_bus_set_null: + bus_set_iommu(&platform_bus_type, NULL); +out_dev_unreg: + iommu_device_unregister(&data->iommu); +out_sysfs_remove: + iommu_device_sysfs_remove(&data->iommu); + return ret; } static int mtk_iommu_remove(struct platform_device *pdev)