From 592033790e8276f7038efb480871598648464a01 Mon Sep 17 00:00:00 2001
From: Nicholas Krause <xerofoify@gmail.com>
Date: Mon, 4 Jan 2016 18:27:57 -0500
Subject: [PATCH] iommu/vt-d: Check the return value of iommu_device_create()
This adds the proper check to alloc_iommu to make sure that
the call to iommu_device_create has completed successfully
and if not return the error code to the caller after freeing
up resources allocated previously.
Signed-off-by: Nicholas Krause <xerofoify@gmail.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
---
drivers/iommu/dmar.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/iommu/dmar.c b/drivers/iommu/dmar.c
index 80e3c176008e5..add177a37f000 100644
--- a/drivers/iommu/dmar.c
+++ b/drivers/iommu/dmar.c
@@ -1070,6 +1070,12 @@ static int alloc_iommu(struct dmar_drhd_unit *drhd)
intel_iommu_groups,
"%s", iommu->name);
+ if (IS_ERR(iommu->iommu_dev)) {
+ drhd->iommu = NULL;
+ err = PTR_ERR(iommu->iommu_dev);
+ goto err_unmap;
+ }
+
return 0;
err_unmap: