usb_find_bulk_in_endpoint
err = usb_find_bulk_in_endpoint(intf->cur_altsetting, &endpoint);
if (usb_find_bulk_in_endpoint(interface->cur_altsetting, &endpoint)) {
if (usb_find_bulk_in_endpoint(iface_desc, &endpoint)) {
res = usb_find_bulk_in_endpoint(altsetting, &epd);
result = usb_find_bulk_in_endpoint(iface_desc, &endpoint);