From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757728Ab3CTB3r (ORCPT ); Tue, 19 Mar 2013 21:29:47 -0400 Received: from avon.wwwdotorg.org ([70.85.31.133]:56675 "EHLO avon.wwwdotorg.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754829Ab3CTB3q (ORCPT ); Tue, 19 Mar 2013 21:29:46 -0400 Message-ID: <51491107.5060001@wwwdotorg.org> Date: Tue, 19 Mar 2013 19:29:43 -0600 From: Stephen Warren User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130221 Thunderbird/17.0.3 MIME-Version: 1.0 To: Andreas Bombe CC: Alan Stern , Greg Kroah-Hartman , linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [Regression] process hangs due to "USB: EHCI: work around silicon bug in Intels EHCI controllers" References: <20130320000336.GA8912@amos.fritz.box> In-Reply-To: <20130320000336.GA8912@amos.fritz.box> X-Enigmail-Version: 1.4.6 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 On 03/19/2013 06:03 PM, Andreas Bombe wrote: > The named commit (6402c796d3) causes a process to hang indefinitely in > usb_kill_urb(). Reverting it fixes the problem. The bug also prevents > suspend/shutdown/reboot from completing, presumably due to the hanging > process. > > (Cc'ing Stephen Warren because I only found his report after I bisected > it myself. Do you also see a blocked process?) Yes, I believe the symptoms we're both seeing are identical. > This is the hanging process on my system: > [ 240.364085] INFO: task colord-sane:3619 blocked for more than 120 seconds. ... > [ 240.364118] Call Trace: > [ 240.364127] [] schedule+0x65/0x67 > [ 240.364132] [] usb_kill_urb+0xb5/0xd3