Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755094AbXHBOcf (ORCPT ); Thu, 2 Aug 2007 10:32:35 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750815AbXHBOcY (ORCPT ); Thu, 2 Aug 2007 10:32:24 -0400 Received: from iolanthe.rowland.org ([192.131.102.54]:45538 "HELO iolanthe.rowland.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1755548AbXHBOcW (ORCPT ); Thu, 2 Aug 2007 10:32:22 -0400 Date: Thu, 2 Aug 2007 10:32:21 -0400 (EDT) From: Alan Stern X-X-Sender: stern@iolanthe.rowland.org To: David Engraf cc: linux-pci@atrey.karlin.mff.cuni.cz, , , Subject: Re: [linux-usb-devel] [PATCH] USB BIOS early handoff only when the we the driver is configured In-Reply-To: <46B1844B.8090007@netcom.eu> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1322 Lines: 31 On Thu, 2 Aug 2007, David Engraf wrote: > This would be solution too, but what if someone uses the uhci controller > and don't want the > ehci. So a single Kconfig flag wouldn't be enough, we have to add 3 > flags for uchi, ohci and > ehci. I think this maybe a little bit difficult when configuring the kernel. > The best solution would be when we could use the CONFIG_USB_xxxx_HCD > flag, but it > seems that some hardware has problems when we disable the handoff and > let the BIOS > control the usb controller. Do you know any of this hardware? The email messages are hidden in the depths of the linux-usb-devel archives. Maybe you can find them by checking the Git history for drivers/usb/host/pci-quirks.c, finding the dates for patches that affected the handoff code, and then searching through the archives near those dates. IIRC the problems arose on some MIPS machines. And I don't think the problem involved letting the firmware manage the USB controller; I think the problem came when the controller driver tried to do the handoff later on. 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/