From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755289AbcKJLLT (ORCPT ); Thu, 10 Nov 2016 06:11:19 -0500 Received: from canardo.mork.no ([148.122.252.1]:33361 "EHLO canardo.mork.no" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755115AbcKJLLS (ORCPT ); Thu, 10 Nov 2016 06:11:18 -0500 From: =?utf-8?Q?Bj=C3=B8rn_Mork?= To: Kai-Heng Feng Cc: Oliver Neukum , Alan Stern , linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, netdev@vger.kernel.org Subject: Re: [PATCH] usbnet: prevent device rpm suspend in usbnet_probe function Organization: m References: <1478692735.2428.10.camel@suse.com> <8760nwj0l3.fsf@miraculix.mork.no> Date: Thu, 10 Nov 2016 12:09:58 +0100 In-Reply-To: (Kai-Heng Feng's message of "Thu, 10 Nov 2016 12:06:31 +0800") Message-ID: <87a8d7h9q1.fsf@miraculix.mork.no> User-Agent: Gnus/5.130015 (Ma Gnus v0.15) Emacs/24.5 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by mail.home.local id uAABBOrw022450 Kai-Heng Feng writes: > On Wed, Nov 9, 2016 at 8:32 PM, Bjørn Mork wrote: >> Oliver Neukum writes: >> >>> On Tue, 2016-11-08 at 13:44 -0500, Alan Stern wrote: >>> >>>> These problems could very well be caused by running at SuperSpeed >>>> (USB-3) instead of high speed (USB-2). > > Yes, it's running at SuperSpeed, on a Kabylake laptop. > > It does not have this issue on a Broadwell laptop, also running at SuperSpeed. Then I must join Oliver, being very surprised by where in the stack you attempt to fix the issue. What you write above indicates a problem in pci bridge or usb host controller, doesn't it? Bjørn