On Fri, Jan 18, 2013 at 10:17 PM, Bjørn Mork <bjorn@xxxxxxx> wrote: >>> Some Sierra Wireless firmwares support CDC MBIM but have no CDC >>> Union funtional descriptor. This violates the MBIM specification, I don't believe Sierra Wireless violates MBIM specification. See in the specification: "there are two ways to group interfaces: the WHCM Union functional descriptor and IAD." Regards, Alexey -- 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