linux-kernel - [PATCH] iommu: fix return error code in iommu_probe

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Message-ID: <20201117025238.3425422-1-yangyingliang@huawei.com>
Date:   Tue, 17 Nov 2020 10:52:38 +0800
From:   Yang Yingliang <yangyingliang@...wei.com>
To:     <iommu@...ts.linux-foundation.org>, <linux-kernel@...r.kernel.org>
CC:     <joro@...tes.org>, <yangyingliang@...wei.com>
Subject: [PATCH] iommu: fix return error code in iommu_probe_device()

If iommu_group_get() failed, it need return error code
in iommu_probe_device().

Fixes: cf193888bfbd ("iommu: Move new probe_device path...")
Reported-by: Hulk Robot <hulkci@...wei.com>
Signed-off-by: Yang Yingliang <yangyingliang@...wei.com>
---
 drivers/iommu/iommu.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index b53446bb8c6b..6f4a32df90f6 100644
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -253,8 +253,10 @@ int iommu_probe_device(struct device *dev)
 		goto err_out;
 
 	group = iommu_group_get(dev);
-	if (!group)
+	if (!group) {
+		ret = -ENODEV;
 		goto err_release;
+	}
 
 	/*
 	 * Try to allocate a default domain - needs support from the
-- 
2.25.1