[PATCH 3.19.y-ckt 17/92] drm/radeon: reset BOs address after clearing it.

[Kamal Mostafa]

3.19.8-ckt1 -stable review patch.  If anyone has any objections, please let me know.

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

From: =?UTF-8?q?Christian=20K=C3=B6nig?= <christian.koenig@xxxxxxx>

commit 48afbd70ac7b6aa62e8d452091023941d8085f8a upstream.

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

Signed-off-by: Christian KÃnig <christian.koenig@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Kamal Mostafa <kamal@xxxxxxxxxxxxx>
---
 drivers/gpu/drm/radeon/radeon_vm.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/radeon/radeon_vm.c b/drivers/gpu/drm/radeon/radeon_vm.c
index 16d8e95..cabcb0a 100644
--- a/drivers/gpu/drm/radeon/radeon_vm.c
+++ b/drivers/gpu/drm/radeon/radeon_vm.c
@@ -490,6 +490,8 @@ int radeon_vm_bo_set_addr(struct radeon_device *rdev,
 			spin_lock(&vm->status_lock);
 			list_add(&tmp->vm_status, &vm->freed);
 			spin_unlock(&vm->status_lock);
+
+			bo_va->addr = 0;
 		}
 
 		interval_tree_remove(&bo_va->it, &vm->va);
-- 
1.9.1

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