Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757458AbZGGUwW (ORCPT ); Tue, 7 Jul 2009 16:52:22 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755296AbZGGUwN (ORCPT ); Tue, 7 Jul 2009 16:52:13 -0400 Received: from mx-out.daemonmail.net ([216.104.160.38]:50278 "EHLO mx-out.daemonmail.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754206AbZGGUwM (ORCPT ); Tue, 7 Jul 2009 16:52:12 -0400 From: "Michael S. Zick" Reply-To: lkml@morethan.org To: Alan Stern Subject: Re: Null Pointer BUG in uhci_hcd Date: Tue, 7 Jul 2009 15:52:06 -0500 User-Agent: KMail/1.9.9 Cc: Oliver Neukum , Jiri Kosina , linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org References: In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200907071552.09196.lkml@morethan.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1315 Lines: 39 On Tue July 7 2009, Alan Stern wrote: > On Tue, 7 Jul 2009, Michael S. Zick wrote: > > > Will add that to my list - - > > I need to do that to find/fix that error path message flood loop in ehci anyway. > > What EHCI message flood? > Give me a chance to test what you have already put on my plate. It isn't very interesting - when the driver shuts down a hub for "problems found" (I can't be more specific at the moment) It will try to immediately after resume the hub; Which leads to it taking the hub out of service; Which leads to it trying to resume the hub; etc. etc. etc. That message flood in the error recovery path. Set: ignore_oc=1 on the command line and that will stop the flood at the first message - but only because it hard-locks the kernel with irq's disabled. On this machine, the "over current" sense is a false indication - something is not within the expected range. Thank goodness, no one has asked me to get this kernel certified for life-support use (not possible, the VIA silicon isn't certified either). ;) Mike > Alan Stern > > > -- 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/