iommu/amd: Handle return of iommu_device_sysfs_add

As iommu_device_sysfs_add() can fail, we should check the return value.

Signed-off-by: Bo Liu <liubo03@inspur.com>
Link: https://lore.kernel.org/r/20220701062008.6988-1-liubo03@inspur.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>

diff --git a/drivers/iommu/amd/init.c b/drivers/iommu/amd/init.c
index 1d08f87..298c836 100644 (file)
--- a/drivers/iommu/amd/init.c
+++ b/drivers/iommu/amd/init.c
@@ -1906,8 +1906,11 @@ static int __init iommu_init_pci(struct amd_iommu *iommu)
        amd_iommu_erratum_746_workaround(iommu);
        amd_iommu_ats_write_check_workaround(iommu);
 
-       iommu_device_sysfs_add(&iommu->iommu, &iommu->dev->dev,
+       ret = iommu_device_sysfs_add(&iommu->iommu, &iommu->dev->dev,
                               amd_iommu_groups, "ivhd%d", iommu->index);
+       if (ret)
+               return ret;
+
        iommu_device_register(&iommu->iommu, &amd_iommu_ops, NULL);
 
        return pci_enable_device(iommu->dev);