From patchwork Thu Jun 6 18:10:51 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Betty Dall X-Patchwork-Id: 249520 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 4471A2C0095 for ; Fri, 7 Jun 2013 04:16:31 +1000 (EST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752784Ab3FFSQB (ORCPT ); Thu, 6 Jun 2013 14:16:01 -0400 Received: from g1t0026.austin.hp.com ([15.216.28.33]:10687 "EHLO g1t0026.austin.hp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752773Ab3FFSP7 (ORCPT ); Thu, 6 Jun 2013 14:15:59 -0400 Received: from g1t0038.austin.hp.com (g1t0038.austin.hp.com [16.236.32.44]) by g1t0026.austin.hp.com (Postfix) with ESMTP id 2494CC27C; Thu, 6 Jun 2013 18:15:59 +0000 (UTC) Received: from linux1.fc.hp.com (linux1.fc.hp.com [16.71.12.34]) by g1t0038.austin.hp.com (Postfix) with ESMTP id 974FD304B6; Thu, 6 Jun 2013 18:15:58 +0000 (UTC) From: Betty Dall To: rjw@sisk.pl, bhelgaas@google.com, gong.chen@linux.intel.com, greg.pearson@hp.com Cc: ying.huang@intel.com, linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, Betty Dall Subject: [PATCH v3 6/6] PCI/AER: Provide reset_link for firmware first root port Date: Thu, 6 Jun 2013 12:10:51 -0600 Message-Id: <1370542251-27387-7-git-send-email-betty.dall@hp.com> X-Mailer: git-send-email 1.7.7.6 In-Reply-To: <1370542251-27387-1-git-send-email-betty.dall@hp.com> References: <1370542251-27387-1-git-send-email-betty.dall@hp.com> Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org The firmware first path does not install the aerdrv root port service driver, so the firmware first root port does not have a reset_link callback. When a firmware first root port does not have a reset_link callback, use a new default reset_link similar to what we already do for the default_downstream_reset_link(). The firmware first default reset_link brings the root port out of SBR if firmware left it in SBR. Changes since v1: Removed incorrect setting of p2p_ctrl after the read. Changes since v2: Treat the default case for a Root Port the same as the existing default case for a Downstream Link. Signed-off-by: Betty Dall --- drivers/pci/pcie/aer/aerdrv_core.c | 17 +++++++++-------- 1 files changed, 9 insertions(+), 8 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html diff --git a/drivers/pci/pcie/aer/aerdrv_core.c b/drivers/pci/pcie/aer/aerdrv_core.c index 8ec8b4f..cb29c04 100644 --- a/drivers/pci/pcie/aer/aerdrv_core.c +++ b/drivers/pci/pcie/aer/aerdrv_core.c @@ -400,16 +400,16 @@ void aer_do_secondary_bus_reset(struct pci_dev *dev) } /** - * default_downstream_reset_link - default reset function for Downstream Port - * @dev: pointer to downstream port's pci_dev data structure + * default_reset_link - default reset function + * @dev: pointer to pci_dev data structure * - * Invoked when performing link reset at Downstream Port w/ no aer driver. + * Invoked when performing link reset on a Downstream Port or a + * Root Port with no aer driver. */ -static pci_ers_result_t default_downstream_reset_link(struct pci_dev *dev) +static pci_ers_result_t default_reset_link(struct pci_dev *dev) { aer_do_secondary_bus_reset(dev); - dev_printk(KERN_DEBUG, &dev->dev, - "Downstream Port link has been reset\n"); + dev_dbg(&dev->dev, "Link has been reset\n"); return PCI_ERS_RESULT_RECOVERED; } @@ -458,8 +458,9 @@ static pci_ers_result_t reset_link(struct pci_dev *dev) if (driver && driver->reset_link) { status = driver->reset_link(udev); - } else if (pci_pcie_type(udev) == PCI_EXP_TYPE_DOWNSTREAM) { - status = default_downstream_reset_link(udev); + } else if (pci_pcie_type(udev) == PCI_EXP_TYPE_DOWNSTREAM || + pci_pcie_type(udev) == PCI_EXP_TYPE_ROOT_PORT) { + status = default_reset_link(udev); } else { dev_printk(KERN_DEBUG, &dev->dev, "no link-reset support at upstream device %s\n",