From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753584Ab0CCKx4 (ORCPT ); Wed, 3 Mar 2010 05:53:56 -0500 Received: from smtprelay04.ispgateway.de ([80.67.31.32]:53803 "EHLO smtprelay04.ispgateway.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753447Ab0CCKxx (ORCPT ); Wed, 3 Mar 2010 05:53:53 -0500 X-Greylist: delayed 406 seconds by postgrey-1.27 at vger.kernel.org; Wed, 03 Mar 2010 05:53:53 EST Message-ID: <20100303114705.33716f9pnen8a8kc@webmail.df.eu> Date: Wed, 03 Mar 2010 11:47:05 +0100 From: peter@piie.net To: Greg KH Cc: linux-kernel@vger.kernel.org Subject: Re: [BUG] usb-serial / pl2302 corrupted receive References: <20100302235353.GB2196@kroah.com> In-Reply-To: <20100302235353.GB2196@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; DelSp="Yes"; format="flowed" Content-Disposition: inline Content-Transfer-Encoding: 7bit User-Agent: Dynamic Internet Messaging Program (DIMP) H3 (1.1.2) X-Originating-IP: 80.82.223.8 X-Df-Sender: 650477 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Greg, Quoting Greg KH : > On Mon, Mar 01, 2010 at 07:07:00PM +0100, Peter Feuerer wrote: >> I connected two pls2302 usb-serial converters to two different >> usb-ports of my machine and connected them with a rs232-nullmodem >> cable to each other. >> >> Terminal1: >> cat /dev/ttyUSB1 >> >> Terminal2: >> while true; do echo 123456789012345678901234567890 > /dev/ttyUSB0 ; done > > cat and echo are known to not work well with usb to serial devices. Can > you duplicate this with a "real" tty program like minicom or something > else? I will try to set up a test use-case which uses kermit. But there is a calltrace in kernel log when using cat & echo, so something in the driver went wrong. Thus there is a bug which can be reproduced and it should be fixed, don't you agree? best regards, --peter