From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752837AbXDCPt4 (ORCPT ); Tue, 3 Apr 2007 11:49:56 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752900AbXDCPt4 (ORCPT ); Tue, 3 Apr 2007 11:49:56 -0400 Received: from mx1.redhat.com ([66.187.233.31]:44690 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752837AbXDCPtz (ORCPT ); Tue, 3 Apr 2007 11:49:55 -0400 Date: Tue, 3 Apr 2007 08:48:03 -0700 From: Pete Zaitcev To: "Kok, Auke" Cc: Nicolas Mailhot , video4linux-list@redhat.com, Michael Bueker , linux-kernel@vger.kernel.org, linux-usb-devel@lists.sourceforge.net, zaitcev@redhat.com Subject: Re: OHCI: USB webcam works, but not on USB Hub Message-Id: <20070403084803.e578260d.zaitcev@redhat.com> In-Reply-To: <46127134.7000108@foo-projects.org> References: <53190.192.54.193.51.1175611316.squirrel@rousalka.dyndns.org> <46127134.7000108@foo-projects.org> Organization: Red Hat, Inc. X-Mailer: Sylpheed 2.3.1 (GTK+ 2.10.11; x86_64-redhat-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 03 Apr 2007 08:22:28 -0700, "Kok, Auke" wrote: > Having the gspca driver move into the main tree would help a lot though. I think we need to articulate better why this is an issue and not just an excuse. We know that scheduling issues with ISO transfers exist, but with the driver outside we can't find a specific issue let alone fix it. These things are hard to fix as it is. For example, an external 2.0 hub with TT moves all transactions from OHCI to EHCI, and adds an interrupt transfer which eats into your schedule. I'm completely unsurprised that this fails. Wanna bet that Michael's issue is something like that? Another thing, requiring them to make the effort comes with an implicit promise to fix whatever the user's problem is once they have moved gspca in-tree. I'm not ready to tackle Michael's case, so I pretended not to see his original mail. -- Pete