From patchwork Fri Jul 26 21:43:19 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kuppuswamy Sathyanarayanan X-Patchwork-Id: 1137653 X-Patchwork-Delegate: bhelgaas@google.com Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=linux-pci-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=linux.intel.com Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 45wN1z3QFxz9sBZ for ; Sat, 27 Jul 2019 07:46:15 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726360AbfGZVqN (ORCPT ); Fri, 26 Jul 2019 17:46:13 -0400 Received: from mga14.intel.com ([192.55.52.115]:28907 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728602AbfGZVpw (ORCPT ); Fri, 26 Jul 2019 17:45:52 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by fmsmga103.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 26 Jul 2019 14:45:51 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.64,312,1559545200"; d="scan'208";a="369671157" Received: from skuppusw-desk.jf.intel.com ([10.54.74.33]) by fmsmga005.fm.intel.com with ESMTP; 26 Jul 2019 14:45:51 -0700 From: sathyanarayanan.kuppuswamy@linux.intel.com To: bhelgaas@google.com Cc: linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, ashok.raj@intel.com, keith.busch@intel.com, sathyanarayanan.kuppuswamy@linux.intel.com Subject: [PATCH v6 9/9] PCI/DPC: Clear AER registers in EDR mode Date: Fri, 26 Jul 2019 14:43:19 -0700 Message-Id: <7111ba701f2bac1b991fe6710dd963d7e2cdb2f9.1564177080.git.sathyanarayanan.kuppuswamy@linux.intel.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: References: MIME-Version: 1.0 Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org From: Kuppuswamy Sathyanarayanan As per PCI firmware specification r3.2 Downstream Port Containment Related Enhancements ECN, OS is responsible for clearing the AER registers in EDR mode. So clear AER registers in dpc_process_error() function. Signed-off-by: Kuppuswamy Sathyanarayanan --- drivers/pci/pcie/dpc.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/pci/pcie/dpc.c b/drivers/pci/pcie/dpc.c index 369df422692f..115590ad10ed 100644 --- a/drivers/pci/pcie/dpc.c +++ b/drivers/pci/pcie/dpc.c @@ -275,6 +275,10 @@ static void dpc_process_error(struct dpc_dev *dpc) pci_aer_clear_fatal_status(pdev); } + /* In EDR mode, OS is responsible for clearing AER registers */ + if (dpc->firmware_dpc) + pci_cleanup_aer_error_status_regs(pdev); + /* * Irrespective of whether the DPC event is triggered by * ERR_FATAL or ERR_NONFATAL, since the link is already down,