From: Yong Wu yong.wu@mediatek.com
[ Upstream commit ac304c070c54413efabf29f9e73c54576d329774 ]
In the original code, we lack the error handle. This patch adds them.
Signed-off-by: Yong Wu yong.wu@mediatek.com Link: https://lore.kernel.org/r/20210412064843.11614-2-yong.wu@mediatek.com Signed-off-by: Joerg Roedel jroedel@suse.de Stable-dep-of: 142e821f68cf ("iommu/mediatek-v1: Fix an error handling path in mtk_iommu_v1_probe()") Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/iommu/mtk_iommu_v1.c | 22 ++++++++++++++++++---- 1 file changed, 18 insertions(+), 4 deletions(-)
diff --git a/drivers/iommu/mtk_iommu_v1.c b/drivers/iommu/mtk_iommu_v1.c index 82ddfe9170d4..4ed8bc755f5c 100644 --- a/drivers/iommu/mtk_iommu_v1.c +++ b/drivers/iommu/mtk_iommu_v1.c @@ -624,12 +624,26 @@ 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)