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[PATCH 4.7 102/186] iommu/amd: Handle IOMMU_DOMAIN_DMA in ops->domain_free call-back

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  [PATCH 4.7 102/186] iommu/amd: Handle IOMMU_DOMAIN_DMA in ops->domain_free call-back Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2016-08-18 16:40 +0200

#1465564 — [PATCH 4.7 102/186] iommu/amd: Handle IOMMU_DOMAIN_DMA in ops->domain_free call-back

4.7-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Joerg Roedel <jroedel@suse.de>

commit cda7005ba2cbd0744fea343dd5b2aa637eba5b9e upstream.

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')
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/iommu/amd_iommu.c |   27 ++++++++++++++++++---------
 1 file changed, 18 insertions(+), 9 deletions(-)

--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -3103,9 +3103,7 @@ static struct iommu_domain *amd_iommu_do
 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);
 
@@ -3114,13 +3112,24 @@ static void amd_iommu_domain_free(struct
 
 	BUG_ON(domain->dev_cnt != 0);
 
-	if (domain->mode != PAGE_MODE_NONE)
-		free_pagetable(domain);
-
-	if (domain->flags & PD_IOMMUV2_MASK)
-		free_gcr3_table(domain);
+	if (!dom)
+		return;
 
-	protection_domain_free(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);
+
+		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,

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