drm/radeon: reset BOs address after clearing it.

[ Upstream commit 48afbd70ac7b6aa62e8d452091023941d8085f8a ]

Otherwise it is possible that we will have page table corruption
if we change a BOs address multiple times.

Signed-off-by: Christian König <christian.koenig@amd.com>
CC: stable@vger.kernel.org
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>

diff --git a/drivers/gpu/drm/radeon/radeon_vm.c b/drivers/gpu/drm/radeon/radeon_vm.c
index b0c4958a3993a653c9b2c6b09aea330c9659007f..190eb5bee4eb3861e5f5c227d3ccaa801329d547 100644 (file)
--- a/drivers/gpu/drm/radeon/radeon_vm.c
+++ b/drivers/gpu/drm/radeon/radeon_vm.c
@@ -513,6 +513,8 @@ int radeon_vm_bo_set_addr(struct radeon_device *rdev,
                        tmp->addr = bo_va->addr;
                        tmp->bo = radeon_bo_ref(bo_va->bo);
                        list_add(&tmp->vm_status, &vm->freed);
+
+                       bo_va->addr = 0;
                }
 
                interval_tree_remove(&bo_va->it, &vm->va);