On Mon, 29 Jun 2009, Yang Fei-AFY095 wrote: > Alan, > > Thanks you for your quick response. Is it possible that the watchdog be > scheduled as a result of some activity on the device side. I'm not sure > if there is a race condition when the host is trying to suspend the bus > while the device is sending something. No, this can't happen. All URBs are unlinked before the root hub is suspended. Alan Stern -- 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