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=-8.3 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 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 250E3C2D0A8 for ; Mon, 28 Sep 2020 21:39:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D746821D46 for ; Mon, 28 Sep 2020 21:39:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726973AbgI1VjV (ORCPT ); Mon, 28 Sep 2020 17:39:21 -0400 Received: from mga06.intel.com ([134.134.136.31]:2319 "EHLO mga06.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726897AbgI1VjU (ORCPT ); Mon, 28 Sep 2020 17:39:20 -0400 IronPort-SDR: nsJiMSfFj/tqUBgV9R9It/+G0AZWxqcIPUv069GWofq97sxWR8d+eaVeucSbpsMUaFwr3z0/w3 Ee9XZnGzuWmw== X-IronPort-AV: E=McAfee;i="6000,8403,9758"; a="223659585" X-IronPort-AV: E=Sophos;i="5.77,315,1596524400"; d="scan'208";a="223659585" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga004.jf.intel.com ([10.7.209.38]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 28 Sep 2020 14:39:20 -0700 IronPort-SDR: GlduqrY/RsAR9qfNJfV5hZ4/+8xG1G4fwXJT6TGdpdy7PBpzKBETyhlKVbKb8w8Y/UUdNuimGG OTOm8O84+4zQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.77,315,1596524400"; d="scan'208";a="457001526" Received: from mattu-haswell.fi.intel.com (HELO [10.237.72.170]) ([10.237.72.170]) by orsmga004.jf.intel.com with ESMTP; 28 Sep 2020 14:39:18 -0700 Subject: Re: [PATCH v3] xhci: Prevent runtime suspend on Etron EJ168 To: Kai-Heng Feng , Mathias Nyman Cc: Greg Kroah-Hartman , "open list:USB XHCI DRIVER" , open list References: <20200504171642.26947-1-kai.heng.feng@canonical.com> <0F26EE78-D4F4-4CCB-892B-999E203BF515@canonical.com> <14291E1B-6580-4C69-9EF8-3B30BC78B8D0@canonical.com> From: Mathias Nyman Openpgp: preference=signencrypt Autocrypt: addr=mathias.nyman@linux.intel.com; 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Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.9.0 MIME-Version: 1.0 In-Reply-To: <14291E1B-6580-4C69-9EF8-3B30BC78B8D0@canonical.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 28.9.2020 12.10, Kai-Heng Feng wrote: > > >> On Jun 8, 2020, at 11:56, Kai-Heng Feng wrote: >> >> >> >>> On May 5, 2020, at 01:16, Kai-Heng Feng wrote: >>> >>> Etron EJ168 USB 3.0 Host Controller stops working after S3, if it was >>> runtime suspended previously: >>> [ 370.080359] pci 0000:02:00.0: can't change power state from D3cold to D0 (config space inaccessible) >>> [ 370.080477] xhci_hcd 0000:04:00.0: can't change power state from D3cold to D0 (config space inaccessible) >>> [ 370.080532] pcieport 0000:00:1c.0: DPC: containment event, status:0x1f05 source:0x0200 >>> [ 370.080533] pcieport 0000:00:1c.0: DPC: ERR_FATAL detected >>> [ 370.080536] xhci_hcd 0000:04:00.0: can't change power state from D3hot to D0 (config space inaccessible) >>> [ 370.080552] xhci_hcd 0000:04:00.0: AER: can't recover (no error_detected callback) >>> [ 370.080566] usb usb3: root hub lost power or was reset >>> [ 370.080566] usb usb4: root hub lost power or was reset >>> [ 370.080572] xhci_hcd 0000:04:00.0: Host halt failed, -19 >>> [ 370.080574] xhci_hcd 0000:04:00.0: Host not accessible, reset failed. >>> [ 370.080575] xhci_hcd 0000:04:00.0: PCI post-resume error -19! >>> [ 370.080586] xhci_hcd 0000:04:00.0: HC died; cleaning up >>> >>> This can be fixed by not runtime suspend the controller at all. >>> >>> So disable runtime suspend for EJ168 xHCI device. >>> >>> Signed-off-by: Kai-Heng Feng >> >> A gentle ping... > > Another gentle ping... Thanks, somehow I didn't notice this earlier. Was the rootcause ever investigated? Preventing runtime suspend looks like a quick fix to get rid of the issue, but possibly just hides some other underlying power management problem -Mathias