From: Bo Liu <liubo03@inspur.com>
Date: Fri, 1 Jul 2022 02:20:08 -0400
Subject: iommu/amd: Handle return of iommu_device_sysfs_add
Git-commit: 83874d51eb4a51725c9403e11476a433add98c34
Patch-mainline: v6.0-rc1
References: bsc#1205701

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>
---
 drivers/iommu/amd/init.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/iommu/amd/init.c b/drivers/iommu/amd/init.c
index 1d08f87e734b..298c836e174f 100644
--- 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);