From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754088Ab2LYSGn (ORCPT ); Tue, 25 Dec 2012 13:06:43 -0500 Received: from mail-pa0-f46.google.com ([209.85.220.46]:55121 "EHLO mail-pa0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753943Ab2LYSGl (ORCPT ); Tue, 25 Dec 2012 13:06:41 -0500 Message-ID: <50D9EB2E.9000105@lwfinger.net> Date: Tue, 25 Dec 2012 12:06:38 -0600 From: Larry Finger User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/17.0 Thunderbird/17.0 MIME-Version: 1.0 To: Alan Stern CC: LKML , linux-usb@vger.kernel.org Subject: Re: Regression in kernel 3.8-rc1 bisected to commit adfa79d: I now get many "unable to enumerate USB device" messages References: In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 12/25/2012 10:26 AM, Alan Stern wrote: > On Mon, 24 Dec 2012, Larry Finger wrote: > >> The problem has been bisected to commit adfa79d entitled "USB: EHCI: make >> ehci-pci a separate driver". The symptom is that my NVIDIA controller again >> reverts to unended logging of messages of the form "hub 2-0:1.0: unable to >> enumerate USB device on port 5". > > A few more details would be helpful, such as the dmesg log (with > CONFIG_USB_DEBUG enabled). As it is, I don't see how that commit could > cause this problem. It should not have resulted in any changes in > behavior -- all it did was split up a driver that was one module into > two modules. > >> This behavior was previously fixed with commit c618759. > > That commit affected the ohci-hcd driver, whereas this one affects > ehci-hcd. They can't possibly be related. Alan, You are the expert, but I am confident of my bisection. A kernel built from commit 3e02320 does not have the problem, but commit adfa79d does. The dmesg output with CONFIG_USB_DEBUG enabled is posted at http://susepaste.org/790689. Thanks for looking at this. Larry