Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757351AbZJBXAq (ORCPT ); Fri, 2 Oct 2009 19:00:46 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756839AbZJBXAp (ORCPT ); Fri, 2 Oct 2009 19:00:45 -0400 Received: from out02.mta.xmission.com ([166.70.13.232]:57060 "EHLO out02.mta.xmission.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756383AbZJBXAo (ORCPT ); Fri, 2 Oct 2009 19:00:44 -0400 To: Alan Cox Cc: Johan Hovold , Greg Kroah-Hartman , Michael Trimarchi , Oliver Neukum , linux-usb@vger.kernel.org, Alan Cox , Andrew Morton , linux-kernel@vger.kernel.org References: <20090924154023.GA27480@localhost> <200909242103.48562.oliver@neukum.org> <20090924202107.4730f2af@lxorguk.ukuu.org.uk> <20090924211459.GB27963@localhost> <4ABD020B.4040901@gandalf.sssup.it> <20090929145514.GF2152@localhost> <20090929235232.1ae6c63b@lxorguk.ukuu.org.uk> <20091002084755.GA7382@localhost> <20091002173308.6158d734@lxorguk.ukuu.org.uk> From: ebiederm@xmission.com (Eric W. Biederman) Date: Fri, 02 Oct 2009 16:00:41 -0700 In-Reply-To: <20091002173308.6158d734@lxorguk.ukuu.org.uk> (Alan Cox's message of "Fri\, 2 Oct 2009 17\:33\:08 +0100") Message-ID: User-Agent: Gnus/5.11 (Gnus v5.11) Emacs/22.2 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-XM-SPF: eid=;;;mid=;;;hst=in01.mta.xmission.com;;;ip=76.21.114.89;;;frm=ebiederm@xmission.com;;;spf=neutral X-SA-Exim-Connect-IP: 76.21.114.89 X-SA-Exim-Mail-From: ebiederm@xmission.com X-Spam-DCC: XMission; sa02 1397; Body=1 Fuz1=1 Fuz2=1 X-Spam-Combo: ;Alan Cox X-Spam-Relay-Country: X-Spam-Report: * -1.8 ALL_TRUSTED Passed through trusted hosts only via SMTP * 0.0 T_TM2_M_HEADER_IN_MSG BODY: T_TM2_M_HEADER_IN_MSG * -3.0 BAYES_00 BODY: Bayesian spam probability is 0 to 1% * [score: 0.0000] * -0.0 DCC_CHECK_NEGATIVE Not listed in DCC * [sa02 1397; Body=1 Fuz1=1 Fuz2=1] * 0.0 T_TooManySym_01 4+ unique symbols in subject * 0.0 T_TooManySym_03 6+ unique symbols in subject * 0.0 XM_SPF_Neutral SPF-Neutral * 0.0 T_TooManySym_02 5+ unique symbols in subject * 0.4 UNTRUSTED_Relay Comes from a non-trusted relay Subject: Re: [PATCH] USB: ftdi_sio: Remove tty->low_latency. X-SA-Exim-Version: 4.2.1 (built Thu, 25 Oct 2007 00:26:12 +0000) X-SA-Exim-Scanned: Yes (on in01.mta.xmission.com) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 757 Lines: 25 I have seen a hang in: /bin/stty (changing the baud rate) set_termios tty_wait_until_sent tty_chars_in_buffer ftdi_chars_in_buffer Where the driver wedged for a serial port and no progress was made. This happened to me several times with 2.6.31. My initial hypothesis was this was a hardware error (as it only happened on single piece of hardware). With all of the driver problems I suspect it could be a driver bug. Any ideas from the people who understand this code? Eric -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/