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: 0bb6e243d7fb ('iommu/amd: Support IOMMU_DOMAIN_DMA type allocation')
Cc: stable@vger.kernel.org # v4.2+
Signed-off-by: Joerg Roedel <jroedel@suse.de>

diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index 155a3e6..5c72d12 100644 (file)
--- a/drivers/iommu/amd_iommu.c
+++ b/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);
 
@@ -2874,13 +2872,24 @@ static void amd_iommu_domain_free(struct iommu_domain *dom)
 
        BUG_ON(domain->dev_cnt != 0);
 
-       if (domain->mode != PAGE_MODE_NONE)
-               free_pagetable(domain);
+       if (!dom)
+               return;
 
-       if (domain->flags & PD_IOMMUV2_MASK)
-               free_gcr3_table(domain);
+       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);
 
-       protection_domain_free(domain);
+               if (domain->flags & PD_IOMMUV2_MASK)
+                       free_gcr3_table(domain);
+
+               protection_domain_free(domain);
+               break;
+       }
 }
 
 static void amd_iommu_detach_device(struct iommu_domain *dom,