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[PATCH] iommu/amd_iommu_init: Handle return of iommu_device_register/iommu_device_sysfs_add

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  [PATCH] iommu/amd_iommu_init: Handle return of iommu_device_register/iommu_device_sysfs_add Arvind Yadav <arvind.yadav.cs@gmail.com> - 2017-06-22 10:30 +0200

#1672407 — [PATCH] iommu/amd_iommu_init: Handle return of iommu_device_register/iommu_device_sysfs_add

iommu_device_register and iommu_device_sysfs_add can fail here and
we must check its return value.

Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
---
 drivers/iommu/amd_iommu_init.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c
index 41a66ae..c420a68 100644
--- a/drivers/iommu/amd_iommu_init.c
+++ b/drivers/iommu/amd_iommu_init.c
@@ -1642,10 +1642,15 @@ static int 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_set_ops(&iommu->iommu, &amd_iommu_ops);
-	iommu_device_register(&iommu->iommu);
+	ret = iommu_device_register(&iommu->iommu);
+	if (ret)
+		return ret;
 
 	return pci_enable_device(iommu->dev);
 }
-- 
1.9.1

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