Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934361AbZDBUYX (ORCPT ); Thu, 2 Apr 2009 16:24:23 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S934277AbZDBUYB (ORCPT ); Thu, 2 Apr 2009 16:24:01 -0400 Received: from fk-out-0910.google.com ([209.85.128.189]:39963 "EHLO fk-out-0910.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934248AbZDBUX7 (ORCPT ); Thu, 2 Apr 2009 16:23:59 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:user-agent:mime-version:to:cc:subject :references:in-reply-to:content-type:content-transfer-encoding; b=AX2h7G/nKq+pFZvLX+kwrzHzXFmNAhuATEO8AyeoXCESOi3A6GOjI1vKdvLyurbz/z a7HZRmwFf4xXlRRbVSXFWMbY3f48AsgJfeVUzq79RkdormEv7aq9Ajb7hAhIKYbj/YWD O7W4taS4bYZ3UUp1sIe2WJCbT9mo66JKUCwJM= Message-ID: <49D51EDD.4060902@gmail.com> Date: Thu, 02 Apr 2009 22:23:57 +0200 From: Jiri Slaby User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; cs-CZ; rv:1.9.1b3pre) Gecko/20090223 SUSE/3.0b2-8.1 Thunderbird/3.0b2 MIME-Version: 1.0 To: Alan Cox CC: Peter Zijlstra , Christophe Lermytte , linux-kernel@vger.kernel.org Subject: Re: mutex_lock_slowpath warning using mxser tty driver (input/output error) References: <1238689565.14822.99.camel@thom> <1238696349.5133.25.camel@laptop> <20090402194401.154bbc36@lxorguk.ukuu.org.uk> In-Reply-To: <20090402194401.154bbc36@lxorguk.ukuu.org.uk> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 634 Lines: 16 On 04/02/2009 08:44 PM, Alan Cox wrote: >> It appears to want to lock a mutex in interrupt context, something >> that's a definite no-no. >> >> CCed the folks who might know a thing or two about the driver. > > Moxa is not a USB driver so the USB trace at the end makes no sense at > all. Yes, unreliable stack entries, but echo_set_canon_col is called from irq context and locks mutex. -- 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/