Date: Mon, 19 Nov 2007 20:26:19 +0200 (EET) From: hsu@bbnetworks.net To: FreeBSD-gnats-submit@FreeBSD.org Subject: kern/118141: usb serial and nokia phones ucomreadcb ucomreadcb: IOERROR Message-ID: <200711191826.lAJIQJe0004963@ranta.suonsivu.net> Resent-Message-ID: <200711200010.lAK0A169078684@freefall.freebsd.org>
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>Number: 118141 >Category: kern >Synopsis: usb serial and nokia phones ucomreadcb ucomreadcb: IOERROR >Confidential: no >Severity: serious >Priority: medium >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Tue Nov 20 00:10:01 UTC 2007 >Closed-Date: >Last-Modified: >Originator: Heikki Suonsivu <hsu@bbnetworks.net> >Release: FreeBSD 7.0-BETA3 i386 >Organization: bbnetworks.net >Environment: System: FreeBSD ranta.suonsivu.net 7.0-BETA3 FreeBSD 7.0-BETA3 #2: Mon Nov 19 12:35:21 EET 2007 hsu@joutseno.wlansystems.com:/usr/obj/usr/src/sys/EBOX2300 i386 Various Nokia phones connected to USB port, RELENG_7. >Description: Nokia modem connection generates this: Nov 19 20:10:38 ranta kernel: ucom1: ucomreadcb: IOERROR and the serial port gets hung here. Restarting pppd works, but the problem repeats itself. When pppd restarts, chat gets a bufferfull of ppp data, so apparently the data was received, it just was never passed to pppd reading the tty. ucom seems to have a missing bit here, like it was not finished: if (status != USBD_NORMAL_COMPLETION) { if (!(sc->sc_state & UCS_RXSTOP)) printf("%s: ucomreadcb: %s\n", device_get_nameunit(sc->sc_dev), usbd_errstr(status)); sc->sc_state |= UCS_RXSTOP; if (status == USBD_STALLED) usbd_clear_endpoint_stall_async(sc->sc_bulkin_pipe); /* XXX we should restart after some delay. */ return; } Could this abnormal completion somehow be ignored? I have also seen writecb errors, but they do not seem to break the connection. >How-To-Repeat: Nokia 6680 seems a good candidate, but I have seen the problem on 9300 as well. 9300 is worse as it will not restart after one successful connection without taking it off the usb for a moment. >Fix: Could the code do resubmit instead of error? >Release-Note: >Audit-Trail: >Unformatted:
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