iommu/amd: Handle IOMMU_DOMAIN_DMA in ops->domain_free call-back

This domain type is not yet handled in the
iommu_ops->domain_free() call-back. Fix that.

Fixes: 0bb6e243 ('iommu/amd: Support IOMMU_DOMAIN_DMA type allocation')
Cc: stable@vger.kernel.org # v4.2+
Signed-off-by: Joerg Roedel <jroedel@suse.de>

drivers/iommu/amd_iommu.c

@@ -2863,9 +2863,7 @@ static struct iommu_domain *amd_iommu_domain_alloc(unsigned type)
 static void amd_iommu_domain_free(struct iommu_domain *dom)
 {
 	struct protection_domain *domain;
-
-	if (!dom)
-		return;
+	struct dma_ops_domain *dma_dom;
 
 	domain = to_pdomain(dom);
 
@@ -2874,6 +2872,15 @@ static void amd_iommu_domain_free(struct iommu_domain *dom)
 
 	BUG_ON(domain->dev_cnt != 0);
 
+	if (!dom)
+		return;
+
+	switch (dom->type) {
+	case IOMMU_DOMAIN_DMA:
+		dma_dom = domain->priv;
+		dma_ops_domain_free(dma_dom);
+		break;
+	default:
 		if (domain->mode != PAGE_MODE_NONE)
 			free_pagetable(domain);
 
@@ -2881,6 +2888,8 @@ static void amd_iommu_domain_free(struct iommu_domain *dom)
 			free_gcr3_table(domain);
 
 		protection_domain_free(domain);
+		break;
+	}
 }
 
 static void amd_iommu_detach_device(struct iommu_domain *dom,