drm/amdgpu: remove VMID first tracking

Not used any more.
Reviewed-by: Junwei Zhang <Jerry.Zhang@amd.com>
Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c

@@ -514,9 +514,6 @@ int amdgpu_vm_grab_id(struct amdgpu_vm *vm, struct amdgpu_ring *ring,
 	if (r)
 		goto error;
 
-	dma_fence_put(id->first);
-	id->first = dma_fence_get(fence);
-
 	dma_fence_put(id->last_flush);
 	id->last_flush = NULL;
 
@@ -2232,7 +2229,6 @@ void amdgpu_vm_manager_fini(struct amdgpu_device *adev)
 	for (i = 0; i < AMDGPU_NUM_VM; ++i) {
 		struct amdgpu_vm_id *id = &adev->vm_manager.ids[i];
 
-		dma_fence_put(adev->vm_manager.ids[i].first);
 		amdgpu_sync_free(&adev->vm_manager.ids[i].active);
 		dma_fence_put(id->flushed_updates);
 		dma_fence_put(id->last_flush);

drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h

@@ -131,7 +131,6 @@ struct amdgpu_vm {
 
 struct amdgpu_vm_id {
 	struct list_head	list;
-	struct dma_fence		*first;
 	struct amdgpu_sync	active;
 	struct dma_fence		*last_flush;
 	atomic64_t		owner;