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>

diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index 6fbce01..69fa7da 100644 (file)
--- 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;