Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752619AbZAFAhG (ORCPT ); Mon, 5 Jan 2009 19:37:06 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750846AbZAFAgx (ORCPT ); Mon, 5 Jan 2009 19:36:53 -0500 Received: from blaine.gmane.org ([80.91.229.8]:38640 "EHLO hugh.gmane.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750764AbZAFAgx (ORCPT ); Mon, 5 Jan 2009 19:36:53 -0500 X-Cloudmark-SP-Filtered: true X-Cloudmark-SP-Result: v=1.0 c=0 a=jn6aa8d8CCRJg873L1wA:9 a=oFit9KpAV4Vr9Tg3-wRD75Yc894A:4 a=fzWx928WHQcA:10 a=w2uCo4zaT6UA:10 Message-ID: <4962A792.9070706@shaw.ca> Date: Mon, 05 Jan 2009 18:36:34 -0600 From: Robert Hancock User-Agent: Thunderbird 2.0.0.19 (Windows/20081209) MIME-Version: 1.0 Newsgroups: gmane.linux.usb.general,gmane.linux.kernel To: Jiri Slaby CC: David Brownell , USB list , Linux Kernel Mailing List , Alan Stern Subject: Re: quirk_usb_disable_ehci takes 2x 1.5s on boot References: <49620DF7.9040006@gmail.com> In-Reply-To: <49620DF7.9040006@gmail.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 958 Lines: 29 Jiri Slaby wrote: > Hi, > > I don't know since which moment (maybe I changed something in bios, but usb > legacy kbd was ever enabled), but quirk_usb_disable_ehci takes for both of my > ehci controllers 1.5 s. > > More precisely, the time is spent in > pci_write_config_byte(pdev, offset + 3, 1); > by > outb((u8)value, 0xCFC + (reg & 3)); > from pci_conf1_write deep in the callstack. > > Is there any workaround known or something. Turning legacy usb off is not an > option, I want to control grub. Most likely the PCI config space write is causing some SMM trap and the BIOS is taking forever to do whatever it's doing. It doesn't report that the handoff failed, though? I'd look for a BIOS update.. -- 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/