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>

diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c
index b11c855..8a0fd3d 100644 (file)
--- 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);