From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933717Ab1J2Rr6 (ORCPT ); Sat, 29 Oct 2011 13:47:58 -0400 Received: from mail-gy0-f174.google.com ([209.85.160.174]:53595 "EHLO mail-gy0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933496Ab1J2Rr5 (ORCPT ); Sat, 29 Oct 2011 13:47:57 -0400 Message-ID: <4EAC3C5C.5000209@lwfinger.net> Date: Sat, 29 Oct 2011 12:48:12 -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: Sarah Sharp CC: USB list , LKML , v4mp Subject: Question about error from xhci-hcd 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 Sarah, Pardon the intrusion, but I'm trying to fix a problem for v4mp, a user of the rtl8192cu driver on an Alfa AWUS036NHR. I have one of the devices, and it works on a USB 2.0 hub, but fails with 3.0 hardware with lots of xhci_hcd 0000:05:00.0: ERROR no room on ep ring messages logged. The device works with an out-of-kernel driver available from the Alfa or Realtek web sites, but I want to fix rtl8192cu. What condition leads to the above message? The user's dmesg buffer has wrapped, thus I don't see the beginning of the failure. He is using a canned distro kernel, thus he cannot include any extra debugging info such as a stack dump when the errors occur. As he uses the compat-wireless package, I think I can incorporate a new copy of xhci-hcd with it, but I have not done so yet. Thanks for any help you can give, Larry