On Thu, Dec 14, 2017 at 07:55:50PM +0100, Bjørn Mork wrote: > It has been reported that the dummy byte we add to avoid > ZLPs can be forwarded by the modem to the PGW/GGSN, and that > some operators will drop the connection if this happens. > > In theory, QMI devices are based on CDC ECM and should as such > both support ZLPs and silently ignore the dummy byte. The latter > assumption failed. Let's test out the first. > > Signed-off-by: Bjørn Mork <bjorn@xxxxxxx> > --- > I am a bit worried about the effect of this change on all the > devices I can't test myself. But trying it is the only way we > can ever find out.... flag zlp is tested with pids: 9034,9048,904c,9075, 908E,9079, 908A,909F and 90A4. In general, qualcomm usb firmware can handle zlps. -- 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
