iommu/amd: Free page-table in protection_domain_free()

Align release of the page-table with the place where it is allocated.
Signed-off-by: NJoerg Roedel <jroedel@suse.de>
Reviewed-by: NSuravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Link: https://lore.kernel.org/r/20200527115313.7426-6-joro@8bytes.org

drivers/iommu/amd_iommu.c

@@ -2387,12 +2387,18 @@ static void cleanup_domain(struct protection_domain *domain)
 
 static void protection_domain_free(struct protection_domain *domain)
 {
+	struct domain_pgtable pgtable;
+
 	if (!domain)
 		return;
 
 	if (domain->id)
 		domain_id_free(domain->id);
 
+	amd_iommu_domain_get_pgtable(domain, &pgtable);
+	atomic64_set(&domain->pt_root, 0);
+	free_pagetable(&pgtable);
+
 	kfree(domain);
 }
 
@@ -2476,7 +2482,6 @@ static struct iommu_domain *amd_iommu_domain_alloc(unsigned type)
 static void amd_iommu_domain_free(struct iommu_domain *dom)
 {
 	struct protection_domain *domain;
-	struct domain_pgtable pgtable;
 
 	domain = to_pdomain(dom);
 
@@ -2494,10 +2499,6 @@ static void amd_iommu_domain_free(struct iommu_domain *dom)
 		dma_ops_domain_free(domain);
 		break;
 	default:
-		amd_iommu_domain_get_pgtable(domain, &pgtable);
-		atomic64_set(&domain->pt_root, 0);
-		free_pagetable(&pgtable);
-
 		if (domain->flags & PD_IOMMUV2_MASK)
 			free_gcr3_table(domain);