AMD IOMMU: make dma_ops_free_pagetable generic

Impact: change code to free pagetables from protection domains

The dma_ops_free_pagetable function can only free pagetables from
dma_ops domains. Change that to free pagetables of pure protection
domains.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>

1 files changed, 5 insertions, 3 deletions

diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c
index b11c855af7b4..8a0fd3d09973 100644
--- a/arch/x86/kernel/amd_iommu.c
+++ b/arch/x86/kernel/amd_iommu.c
@@ -587,12 +587,12 @@ static void dma_ops_reserve_addresses(struct dma_ops_domain *dom,
         iommu_area_reserve(dom->bitmap, start_page, pages);
 }
 
-static void dma_ops_free_pagetable(struct dma_ops_domain *dma_dom)
+static void free_pagetable(struct protection_domain *domain)
 {
         int i, j;
         u64 *p1, *p2, *p3;
 
-        p1 = dma_dom->domain.pt_root;
+        p1 = domain->pt_root;
 
         if (!p1)
                 return;
@@ -613,6 +613,8 @@ static void dma_ops_free_pagetable(struct dma_ops_domain *dma_dom)
         }
 
         free_page((unsigned long)p1);
+
+        domain->pt_root = NULL;
 }
 
 /*
@@ -624,7 +626,7 @@ static void dma_ops_domain_free(struct dma_ops_domain *dom)
         if (!dom)
                 return;
 
-        dma_ops_free_pagetable(dom);
+        free_pagetable(&dom->domain);
 
         kfree(dom->pte_pages);