From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752870Ab1JQSdx (ORCPT ); Mon, 17 Oct 2011 14:33:53 -0400 Received: from mail-gy0-f174.google.com ([209.85.160.174]:64048 "EHLO mail-gy0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751433Ab1JQSdv (ORCPT ); Mon, 17 Oct 2011 14:33:51 -0400 Message-ID: <4E9C7518.7080005@lwfinger.net> Date: Mon, 17 Oct 2011 13:34:00 -0500 From: Larry Finger User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:7.0.1) Gecko/20110929 Thunderbird/7.0.1 MIME-Version: 1.0 To: LKML CC: wireless , v4mp , Alan Stern , Greg Kroah-Hartman Subject: Problem with xhci-hcd and Alfa AWUS036NHR Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org I am trying to help v4mp with a wireless problem. He is running Ubuntu natty 3.0.4-030004-generic and get the following items in his dmesg output: [ 3.963920] xhci_hcd 0000:05:00.0: WARN: short transfer on control ep [ 3.970920] xhci_hcd 0000:05:00.0: WARN: short transfer on control ep [ 3.975037] xhci_hcd 0000:05:00.0: WARN: short transfer on control ep [ 3.976097] usb 3-2: ep 0x81 - rounding interval to 64 microframes, ep desc says 80 microframes [ 3.984899] xhci_hcd 0000:05:00.0: WARN: short transfer on control ep and later many of [ 545.272708] xhci_hcd 0000:05:00.0: ERROR no room on ep ring A nearly complete dmesg output is at http://pastebin.com/7tfcBfbD. I asked the OP to paste the entire output, but he gave me what is posted there. Is there a bug in the rtl8192cu USB handling that would let the device work with ehci-hcd and ohci-hcd, but fail with xhci-hcd? Would commit 44f4c3e (USB: xhci: Set change bit when warm reset change is set) have any effect on this? I do not know if this is in 3.0.4. I did not find any other recent commits that are aimed at xhci and looked as if they might address this issue. Did I miss any? Note: The Alfa device works fine on my system with only ohci and ehci controllers. Thanks, Larry