Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751787Ab3FXQfj (ORCPT ); Mon, 24 Jun 2013 12:35:39 -0400 Received: from youngberry.canonical.com ([91.189.89.112]:40361 "EHLO youngberry.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750884Ab3FXQfi (ORCPT ); Mon, 24 Jun 2013 12:35:38 -0400 Message-ID: <51C87554.8010503@canonical.com> Date: Mon, 24 Jun 2013 12:35:32 -0400 From: Joseph Salisbury User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130529 Thunderbird/17.0.6 MIME-Version: 1.0 To: Alan Stern CC: Greg KH , USB list , linux-kernel@vger.kernel.org Subject: Subject: [v3.8 Regression] UHCI: OHCI: implement new semantics for URB_ISO_ASAP Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1416 Lines: 49 Hi Alan, A bug was opened against the Ubuntu distro[0]. It is believed that the following commits introduced the regression: commit c44b225077bb1fb25ed5cd5c4f226897b91bedd4 Author: Alan Stern Date: Mon Oct 1 10:32:09 2012 -0400 UHCI: implement new semantics for URB_ISO_ASAP commit 6a41b4d3fe8cd4cc95181516fc6fba7b1747a27c Author: Alan Stern Date: Mon Oct 1 10:32:15 2012 -0400 OHCI: implement new semantics for URB_ISO_ASAP The regression was introduced as of v3.8-rc1. I see the following commit was created to address a similar issue to this: commit e1944017839d7dfbf7329fac4bdec8b4050edf5e Author: Alan Stern Date: Tue May 14 13:57:19 2013 -0400 USB: fix latency in uhci-hcd and ohci-hcd I created a test kernel with commit e1944017839d7dfbf7329fac4bdec8b4050edf5e. However, folks affected state this bug still exists with commit e194401. It is also reported that this bug exists in the latest Mainline kernel. I see that you are the author of these patches, so I wanted to get your opinion on the issue. Thanks, Joe [0] http://pad.lv/1191603 -- 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/