From patchwork Tue Aug 27 17:29:23 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kuppuswamy Sathyanarayanan X-Patchwork-Id: 1153993 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 46HwvB0TYDz9sDQ for ; Wed, 28 Aug 2019 03:33:10 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730611AbfH0RdF (ORCPT ); Tue, 27 Aug 2019 13:33:05 -0400 Received: from mga18.intel.com ([134.134.136.126]:62462 "EHLO mga18.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730438AbfH0Rcm (ORCPT ); Tue, 27 Aug 2019 13:32:42 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga007.jf.intel.com ([10.7.209.58]) by orsmga106.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 27 Aug 2019 10:32:38 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.64,438,1559545200"; d="scan'208";a="171269785" Received: from skuppusw-desk.jf.intel.com ([10.54.74.33]) by orsmga007.jf.intel.com with ESMTP; 27 Aug 2019 10:32:38 -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 v8 1/8] PCI/ERR: Update error status after reset_link() Date: Tue, 27 Aug 2019 10:29:23 -0700 Message-Id: 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 Commit bdb5ac85777d ("PCI/ERR: Handle fatal error recovery") uses reset_link() to recover from fatal errors. But, if the reset is successful there is no need to continue the rest of the error recovery checks. Also, during fatal error recovery, if the initial value of error status is PCI_ERS_RESULT_DISCONNECT or PCI_ERS_RESULT_NO_AER_DRIVER then even after successful recovery (using reset_link()) pcie_do_recovery() will report the recovery result as failure. So update the status of error after reset_link(). Fixes: bdb5ac85777d ("PCI/ERR: Handle fatal error recovery") Cc: Ashok Raj Cc: Keith Busch Signed-off-by: Kuppuswamy Sathyanarayanan Acked-by: Keith Busch --- drivers/pci/pcie/err.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/drivers/pci/pcie/err.c b/drivers/pci/pcie/err.c index 773197a12568..c3e883d47675 100644 --- a/drivers/pci/pcie/err.c +++ b/drivers/pci/pcie/err.c @@ -204,9 +204,12 @@ void pcie_do_recovery(struct pci_dev *dev, enum pci_channel_state state, else pci_walk_bus(bus, report_normal_detected, &status); - if (state == pci_channel_io_frozen && - reset_link(dev, service) != PCI_ERS_RESULT_RECOVERED) - goto failed; + if (state == pci_channel_io_frozen) { + status = reset_link(dev, service); + if (status != PCI_ERS_RESULT_RECOVERED) + goto failed; + goto done; + } if (status == PCI_ERS_RESULT_CAN_RECOVER) { status = PCI_ERS_RESULT_RECOVERED; @@ -228,6 +231,7 @@ void pcie_do_recovery(struct pci_dev *dev, enum pci_channel_state state, if (status != PCI_ERS_RESULT_RECOVERED) goto failed; +done: pci_dbg(dev, "broadcast resume message\n"); pci_walk_bus(bus, report_resume, &status);