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>

1 files changed, 7 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index d9dc8bea5e98..364db7c45c67 100644
--- 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);