From patchwork Thu Sep 20 16:27:10 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Keith Busch X-Patchwork-Id: 10608109 X-Patchwork-Delegate: bhelgaas@google.com Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 18608913 for ; Thu, 20 Sep 2018 16:26:31 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 088D32DDB5 for ; Thu, 20 Sep 2018 16:26:31 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id F0C292E00F; Thu, 20 Sep 2018 16:26:30 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id A88492DDB5 for ; Thu, 20 Sep 2018 16:26:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730149AbeITWKp (ORCPT ); Thu, 20 Sep 2018 18:10:45 -0400 Received: from mga07.intel.com ([134.134.136.100]:21046 "EHLO mga07.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729361AbeITWKp (ORCPT ); Thu, 20 Sep 2018 18:10:45 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga005.jf.intel.com ([10.7.209.41]) by orsmga105.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 20 Sep 2018 09:26:29 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.54,281,1534834800"; d="scan'208";a="258918179" Received: from unknown (HELO localhost.lm.intel.com) ([10.232.112.44]) by orsmga005.jf.intel.com with ESMTP; 20 Sep 2018 09:26:28 -0700 From: Keith Busch To: Linux PCI , Bjorn Helgaas Cc: Benjamin Herrenschmidt , Sinan Kaya , Thomas Tai , poza@codeaurora.org, Lukas Wunner , Christoph Hellwig , Mika Westerberg , Keith Busch Subject: [PATCHv4 05/12] PCI: AER: Don't read upstream ports below fatal errors Date: Thu, 20 Sep 2018 10:27:10 -0600 Message-Id: <20180920162717.31066-6-keith.busch@intel.com> X-Mailer: git-send-email 2.13.6 In-Reply-To: <20180920162717.31066-1-keith.busch@intel.com> References: <20180920162717.31066-1-keith.busch@intel.com> Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The AER driver has never read the config space of an end device that reported a fatal error because the link to that device is considered unreliable. An ERR_FATAL from upstream port almost certainly detected that error on its upstream link, so we can't expect to reliably read its config space for the same reason. Signed-off-by: Keith Busch --- drivers/pci/pcie/aer.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/pci/pcie/aer.c b/drivers/pci/pcie/aer.c index ffbbd759683c..5c3ea7254c6a 100644 --- a/drivers/pci/pcie/aer.c +++ b/drivers/pci/pcie/aer.c @@ -1116,8 +1116,9 @@ int aer_get_device_error_info(struct pci_dev *dev, struct aer_err_info *info) &info->mask); if (!(info->status & ~info->mask)) return 0; - } else if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE || - info->severity == AER_NONFATAL) { + } else if (pci_pcie_type(dev) == PCI_EXP_TYPE_ROOT_PORT || + pci_pcie_type(dev) == PCI_EXP_TYPE_DOWNSTREAM || + info->severity == AER_NONFATAL) { /* Link is still healthy for IO reads */ pci_read_config_dword(dev, pos + PCI_ERR_UNCOR_STATUS,