iommu/vt-d: returning free pointer in get_domain_for_dev()

If we hit this error condition then we want to return a NULL pointer and
not a freed variable.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index 6fbce01b7875..69fa7da5e48b 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -2257,6 +2257,7 @@ static struct dmar_domain *get_domain_for_dev(struct device *dev, int gaw)
                 goto error;
         if (iommu_attach_domain(domain, iommu)) {
                 free_domain_mem(domain);
+                domain = NULL;
                 goto error;
         }
         free = domain;