From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756112AbZINQpk (ORCPT ); Mon, 14 Sep 2009 12:45:40 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753739AbZINQpg (ORCPT ); Mon, 14 Sep 2009 12:45:36 -0400 Received: from kroah.org ([198.145.64.141]:40683 "EHLO coco.kroah.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753717AbZINQpe (ORCPT ); Mon, 14 Sep 2009 12:45:34 -0400 Date: Mon, 14 Sep 2009 09:43:33 -0700 From: Greg KH To: e9hack Cc: linux-kernel@vger.kernel.org Subject: Re: Trouble with USB serial driver (ftdi_sio.c) on 2.6.31 Message-ID: <20090914164333.GB25381@kroah.com> References: <4AAB8F3F.40403@googlemail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4AAB8F3F.40403@googlemail.com> User-Agent: Mutt/1.5.20 (2009-06-14) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sat, Sep 12, 2009 at 02:08:31PM +0200, e9hack wrote: > Hi, > > I've some trouble with the USB serial driver (ftdi_sio.c for a FT232RL from FTDI). If the > port is opened for the first time, the driver works perfectly. If the port is closed and > open again, it isn't possible to read any data from port. Writing data to the port works. > The FT232RL must be reconnect to get it working again. A reboot without reconnect doesn't > solve this problem. If I look at the debug output, I don't see read requests from > ftdi_sio.c. If reading is possible, I see this read messages: {sigh} Yes, this driver is a bit messed up in .31, sorry. We are working through it and hope to have a fix in one of the upcoming .31-stable releases. thanks, greg k-h