if (bus->conf.scan_mode == RTE_BUS_SCAN_UNDEFINED) {
bus->conf.scan_mode = RTE_BUS_SCAN_WHITELIST;
} else if (bus->conf.scan_mode == RTE_BUS_SCAN_BLACKLIST) {
if (bus->conf.scan_mode == RTE_BUS_SCAN_UNDEFINED) {
bus->conf.scan_mode = RTE_BUS_SCAN_WHITELIST;
} else if (bus->conf.scan_mode == RTE_BUS_SCAN_BLACKLIST) {