Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
From:   Rolf Eike Beer <eb@emlix.com>
To:     Joerg Roedel <joro@8bytes.org>, Will Deacon <will@kernel.org>
Cc:     David Woodhouse <dwmw2@infradead.org>,
        Lu Baolu <baolu.lu@linux.intel.com>,
        iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org
Subject: [PATCH] Intel IOMMU: fix sysfs leak in hotplug init path
Date:   Wed, 21 Apr 2021 17:12:41 +0200
Message-ID: <1716403.SmlLz2RZUD@devpool47>
Organization: emlix GmbH
MIME-Version: 1.0
Content-Transfer-Encoding: 8BIT
Content-Type: text/plain; charset="UTF-8"
Precedence: bulk

Signed-off-by: Rolf Eike Beer <eb@emlix.com>
---
 drivers/iommu/intel/dmar.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

I have not actually tested this but I guess it should match the code in 
free_iommu() just below.

diff --git a/drivers/iommu/intel/dmar.c b/drivers/iommu/intel/dmar.c
index d5c51b5c20af..fb37a9b79b3a 100644
--- a/drivers/iommu/intel/dmar.c
+++ b/drivers/iommu/intel/dmar.c
@@ -1144,7 +1144,7 @@ static int alloc_iommu(struct dmar_drhd_unit *drhd)
 
 		err = iommu_device_register(&iommu->iommu);
 		if (err)
-			goto err_unmap;
+			goto err_unregister;
 	}
 
 	drhd->iommu = iommu;
@@ -1152,6 +1152,8 @@ static int alloc_iommu(struct dmar_drhd_unit *drhd)
 
 	return 0;
 
+err_unregister:
+	iommu_device_sysfs_remove(&iommu->iommu);
 err_unmap:
 	unmap_iommu(iommu);
 error_free_seq_id:
-- 
2.31.1


-- 
Rolf Eike Beer, emlix GmbH, http://www.emlix.com
Fon +49 551 30664-0, Fax +49 551 30664-11
Gothaer Platz 3, 37083 Göttingen, Germany
Sitz der Gesellschaft: Göttingen, Amtsgericht Göttingen HR B 3160
Geschäftsführung: Heike Jordan, Dr. Uwe Kracke – Ust-IdNr.: DE 205 198 055

emlix - smart embedded open source