topo_usb_enum_device
if ((ret = topo_usb_enum_device(mod, tn, port)) != 0)
if ((ret = topo_usb_enum_device(mod, tn, port)) != 0)
if ((ret = topo_usb_enum_device(mod, tn, p)) != 0)
static int topo_usb_enum_device(topo_mod_t *, tnode_t *, topo_usb_port_t *);