Peter Wu [mailto:peter@xxxxxxxxxxxxx] > Sent: Tuesday, December 08, 2015 12:59 AM [...] > + if (tp->netdev->flags & IFF_UP) { Maybe you could just replace the checking of netif_running(tp->netdev) with this. Excuse me. I have a question. Before the open() is finished, the netif_running() would be true, but the IFF_UP wouldn't be set. Is it right? Best Regards, Hayes -- 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