TB_TUNNEL_PCI
tunnel = tb_find_tunnel(tb, TB_TUNNEL_PCI, NULL, up);
KUNIT_EXPECT_EQ(test, tunnel1->type, TB_TUNNEL_PCI);
KUNIT_EXPECT_EQ(test, tunnel2->type, TB_TUNNEL_PCI);
tunnel = tb_tunnel_alloc(tb, 2, TB_TUNNEL_PCI);
tunnel = tb_tunnel_alloc(tb, 2, TB_TUNNEL_PCI);
return tunnel->type == TB_TUNNEL_PCI;