drm/amdgpu: free userptrs even if GTT isn't bound

This fixes a memory leak since binding GTT only on demand.
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_ttm.c

@@ -757,6 +757,9 @@ static int amdgpu_ttm_backend_unbind(struct ttm_tt *ttm)
 {
 	struct amdgpu_ttm_tt *gtt = (void *)ttm;
 
+	if (gtt->userptr)
+		amdgpu_ttm_tt_unpin_userptr(ttm);
+
 	if (!amdgpu_ttm_is_bound(ttm))
 		return 0;
 
@@ -764,9 +767,6 @@ static int amdgpu_ttm_backend_unbind(struct ttm_tt *ttm)
 	if (gtt->adev->gart.ready)
 		amdgpu_gart_unbind(gtt->adev, gtt->offset, ttm->num_pages);
 
-	if (gtt->userptr)
-		amdgpu_ttm_tt_unpin_userptr(ttm);
-
 	spin_lock(&gtt->adev->gtt_list_lock);
 	list_del_init(&gtt->list);
 	spin_unlock(&gtt->adev->gtt_list_lock);