RTE_VERIFY(bus->scan);
RTE_VERIFY(bus->probe);
RTE_VERIFY(bus->find_device);
+ /* Buses supporting driver plug also require unplug. */
+ RTE_VERIFY(!bus->plug || bus->unplug);
TAILQ_INSERT_TAIL(&rte_bus_list, bus, next);
RTE_LOG(DEBUG, EAL, "Registered [%s] bus.\n", bus->name);