for (i = 0; i < iface_desc->desc.bNumEndpoints; i++) {
                endpoint = &iface_desc->endpoint[i].desc;
                if (usb_endpoint_is_bulk_out(endpoint)) {
-                       dbg("found bulk out on endpoint %d", i);
+                       dev_dbg(&serial->dev->dev,
+                               "found bulk out on endpoint %d\n", i);
                        ++num_bulk_out;
                }
        }
 
        if (num_bulk_out == 0) {
-               dbg("Invalid interface, discarding");
+               dev_dbg(&serial->dev->dev, "Invalid interface, discarding\n");
                return -ENODEV;
        }
 
                packet += HCI_HEADER_LENGTH;
        }
        if (len <= 0) {
-               dbg("%s - malformed packet", __func__);
+               dev_dbg(&port->dev, "%s - malformed packet\n", __func__);
                return 0;
        }