linux-kernel - [PATCH] iommu/amd: Handle return of iommu_device_sysfs

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Date:   Fri, 1 Jul 2022 02:20:08 -0400
From:   Bo Liu <liubo03@...pur.com>
To:     <joro@...tes.org>, <will@...nel.org>,
        <suravee.suthikulpanit@....com>
CC:     <iommu@...ts.linux-foundation.org>, <iommu@...ts.linux.dev>,
        <linux-kernel@...r.kernel.org>, Bo Liu <liubo03@...pur.com>
Subject: [PATCH] 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@...pur.com>
---
 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 3c82d9c5f1c0..a3c4fdd40f04 100644
--- a/drivers/iommu/amd/init.c
+++ b/drivers/iommu/amd/init.c
@@ -2058,8 +2058,11 @@ 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);
-- 
2.27.0