usb_callback
status = (*udi->usb_m->queue_bulk)(pipe, buffer, len, usb_callback, udi);
status = (*udi->usb_m->queue_bulk)(pipe, buffer, len, usb_callback, udi);
if(B_OK == (status = (*udi->usb_m->queue_bulk)(pipe, buf, len, usb_callback, udi))) {