Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933414AbXHJJOT (ORCPT ); Fri, 10 Aug 2007 05:14:19 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1757373AbXHJJOK (ORCPT ); Fri, 10 Aug 2007 05:14:10 -0400 Received: from server009.webpack.hosteurope.de ([80.237.130.17]:37772 "EHLO server009.webpack.hosteurope.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754678AbXHJJOJ (ORCPT ); Fri, 10 Aug 2007 05:14:09 -0400 X-Greylist: delayed 1683 seconds by postgrey-1.27 at vger.kernel.org; Fri, 10 Aug 2007 05:14:09 EDT From: Daniel Exner Reply-To: webmaster@dragonslave.de To: linux-kernel@vger.kernel.org Subject: EHCI Regression in 2.6.23-rc2 Date: Fri, 10 Aug 2007 10:45:57 +0200 User-Agent: KMail/1.9.7 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200708101045.57166.dex@dragonslave.de> X-bounce-key: webpack.hosteurope.de;dex@dragonslave.de;1186737249;bdcca566; Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1936 Lines: 51 Hi! Please CC me, as I'm currently not subscribed to this list, thx. After some serious hangs with 2.6.23-rc2 I did some bisects and this was the result: 196705c9bbc03540429b0f7cf9ee35c2f928a534 is first bad commit commit 196705c9bbc03540429b0f7cf9ee35c2f928a534 Author: Stuart_Hayes@Dell.com Date: Thu May 3 08:58:49 2007 -0700 USB: EHCI cpufreq fix EHCI controllers that don't cache enough microframes can get MMF errors when CPU frequency changes occur between the start and completion of split interrupt transactions, due to delays in reading main memory (caused by CPU cache snoop delays). This patch adds a cpufreq notifier to the EHCI driver that will inactivate split interrupt transactions during frequency transitions. It was tested on Intel ICH7 and Serverworks/Broadcom HT1000 EHCI controllers. Signed-off-by: Stuart Hayes Signed-off-by: David Brownell Signed-off-by: Greg Kroah-Hartman :040000 040000 0e6d518de17cf18155c7529f7b044a4660ca24e9 736bbcc7d3fb138138ee1840d8a6b83b959c07fc M drivers As expected my system only hangs when cpufreq, powernow-k8 and ehci modules are loaded, and some transition should occur. (Simulated by using userspace governour and changing freq manually) The corresponding EHCI Controller is: 00:10.4 USB Controller: VIA Technologies, Inc. USB 2.0 (rev 86) (prog-if 20 [EHCI]) Subsystem: ASUSTeK Computer Inc. A7V600/K8V-X/A8V Deluxe motherboard I could not get my hands on any output while the hang occurs, seems like the CPU is really bad locked. Greetings Daniel Exner - 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/