From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751864AbbARGIX (ORCPT ); Sun, 18 Jan 2015 01:08:23 -0500 Received: from mail-pa0-f42.google.com ([209.85.220.42]:57159 "EHLO mail-pa0-f42.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750880AbbARGIV (ORCPT ); Sun, 18 Jan 2015 01:08:21 -0500 Message-ID: <54BB4DD2.1070602@gmail.com> Date: Sun, 18 Jan 2015 00:08:18 -0600 From: Robert Hancock User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.4.0 MIME-Version: 1.0 To: linux-kernel , Linux-usb Subject: 3.18 regression: Error while assigning device slot ID, USB3 devices not detected Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org I've got an Intel Haswell-based system with a Gigabyte Z87X-D3H motherboard under Fedora 21. After updating to the 3.18.2-200 Fedora kernel, I noticed some errors in dmesg and at least some of my USB3 ports don't recognize any USB3 devices plugged into them: [ 0.560838] xhci_hcd 0000:00:14.0: Error while assigning device slot ID [ 0.560912] xhci_hcd 0000:00:14.0: Max number of devices this xHCI host supports is 32. [ 0.560990] usb usb2-port2: couldn't allocate usb_device [ 0.561098] xhci_hcd 0000:00:14.0: Error while assigning device slot ID [ 0.561163] xhci_hcd 0000:00:14.0: Max number of devices this xHCI host supports is 32. [ 0.561239] usb usb2-port5: couldn't allocate usb_device [ 0.561344] xhci_hcd 0000:00:14.0: Error while assigning device slot ID [ 0.561409] xhci_hcd 0000:00:14.0: Max number of devices this xHCI host supports is 32. [ 0.561484] usb usb2-port6: couldn't allocate usb_device This worked fine under 3.17. Is this a known problem?