[PATCH 4.4 068/138] iommu/amd: Handle IOMMU_DOMAIN_DMA in ops->domain_free call-back

Greg Kroah-Hartman
2016-08-18T14:03:37Z

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
@@ -2970,9 +2970,7 @@ 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);

@@ -2981,13 +2979,24 @@ 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,