From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.5 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,USER_AGENT_MUTT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 891A5C43441 for ; Thu, 15 Nov 2018 10:35:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4A15C2086C for ; Thu, 15 Nov 2018 10:35:56 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 4A15C2086C Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.intel.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387574AbeKOUnK (ORCPT ); Thu, 15 Nov 2018 15:43:10 -0500 Received: from mga04.intel.com ([192.55.52.120]:19152 "EHLO mga04.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728609AbeKOUnK (ORCPT ); Thu, 15 Nov 2018 15:43:10 -0500 X-Amp-Result: UNKNOWN X-Amp-Original-Verdict: FILE UNKNOWN X-Amp-File-Uploaded: False Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmsmga104.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 15 Nov 2018 02:35:53 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.56,236,1539673200"; d="scan'208";a="108281452" Received: from lahna.fi.intel.com (HELO lahna) ([10.237.72.157]) by fmsmga001.fm.intel.com with SMTP; 15 Nov 2018 02:35:50 -0800 Received: by lahna (sSMTP sendmail emulation); Thu, 15 Nov 2018 12:35:49 +0200 Date: Thu, 15 Nov 2018 12:35:49 +0200 From: Mika Westerberg To: linux-kernel@vger.kernel.org Cc: Andreas Noever , Michael Jamet , Yehezkel Bernat , "Rafael J. Wysocki" , Bjorn Helgaas , Lukas Wunner , Mario.Limonciello@dell.com, Anthony Wong Subject: Re: [PATCH] thunderbolt: Prevent root port runtime suspend during NVM upgrade Message-ID: <20181115103549.GV2500@lahna.fi.intel.com> References: <20181107111714.25694-1-mika.westerberg@linux.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20181107111714.25694-1-mika.westerberg@linux.intel.com> Organization: Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Nov 07, 2018 at 02:17:14PM +0300, Mika Westerberg wrote: > During NVM upgrade process the host router is hot-removed for a short > while. During this time it is possible that the root port is moved into > D3cold which would be fine if the root port could trigger PME on itself. > However, many systems actually do not implement it so what happens is > that the root port goes into D3cold and never wakes up unless userspace > does PCI config space access, such as running 'lscpi'. > > For this reason we explicitly prevent the root port from runtime > suspending during NVM upgrade. > > Signed-off-by: Mika Westerberg Applied to thunderbolt.git/fixes.