Johan thanks for your advices. Currently I don't have the opportunity to test the patch on a linux-next system. Therefore I will apply now the patch only for the qmi_wwan IF only and I will wait the option backport/update on my system to send the option patch. For this device the option IF is an auxiliary IF, the most important is the qmi_wwan. Thanks, Giuseppe -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html