Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758569AbYABTrP (ORCPT ); Wed, 2 Jan 2008 14:47:15 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754231AbYABTq7 (ORCPT ); Wed, 2 Jan 2008 14:46:59 -0500 Received: from iolanthe.rowland.org ([192.131.102.54]:46236 "HELO iolanthe.rowland.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1754242AbYABTq7 (ORCPT ); Wed, 2 Jan 2008 14:46:59 -0500 Date: Wed, 2 Jan 2008 14:46:56 -0500 (EST) From: Alan Stern X-X-Sender: stern@iolanthe.rowland.org To: Mike Frysinger cc: David Brownell , , , Robin Getz , Subject: Re: [linux-usb-devel] [PATCH] : Allow embedded developers USB options normally reserved for OTG In-Reply-To: <8bd0f97a0801021058g15d32de7nd29102ec552ba5fa@mail.gmail.com> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1004 Lines: 24 On Wed, 2 Jan 2008, Mike Frysinger wrote: > perhaps the code size is arguable as to whether it really matters. > the reason we want it is that we have a USB host controller that will > not work with USB hubs, so we want to make sure the system does not > attempt such things. (yes, such a USB host controller is retarded, > but the decision was out of our hands.) Just out of curiosity, how does a host controller manage to avoid working with external hubs? Is it a matter of power consumption? It seems to me that in all other respects a hub should appear the same as any other USB device. Or is it a question of whether the controller works when communicating with devices behind an external hub? And if it is, what is the difficulty? 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/