drm/amdgpu: sync to the active user on reusing a VMID

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Chunming Zhou <david1.zhou@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index d9dc8be..364db7c 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -188,6 +188,13 @@ int amdgpu_vm_grab_id(struct amdgpu_vm *vm, struct amdgpu_ring *ring,
                if (!is_later && owner == (long)id &&
                    pd_addr == id->pd_gpu_addr) {
 
+                       r = amdgpu_sync_fence(ring->adev, sync,
+                                             id->mgr_id->active);
+                       if (r) {
+                               mutex_unlock(&adev->vm_manager.lock);
+                               return r;
+                       }
+
                        fence_put(id->mgr_id->active);
                        id->mgr_id->active = fence_get(fence);