From patchwork Fri Aug 31 21:26:34 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Keith Busch X-Patchwork-Id: 10584469 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 D68F814E1 for ; Fri, 31 Aug 2018 21:25:30 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 7DF412C6E8 for ; Fri, 31 Aug 2018 21:25:30 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 725432C6EA; Fri, 31 Aug 2018 21:25:30 +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 2CBDF2C6E4 for ; Fri, 31 Aug 2018 21:25:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727425AbeIABes (ORCPT ); Fri, 31 Aug 2018 21:34:48 -0400 Received: from mga12.intel.com ([192.55.52.136]:14096 "EHLO mga12.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727423AbeIABes (ORCPT ); Fri, 31 Aug 2018 21:34:48 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga001.jf.intel.com ([10.7.209.18]) by fmsmga106.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 31 Aug 2018 14:25:29 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.53,313,1531810800"; d="scan'208";a="86663839" Received: from unknown (HELO localhost.lm.intel.com) ([10.232.112.44]) by orsmga001.jf.intel.com with ESMTP; 31 Aug 2018 14:25:28 -0700 From: Keith Busch To: Linux PCI , Bjorn Helgaas Cc: Benjamin Herrenschmidt , Sinan Kaya , Thomas Tai , poza@codeaurora.org, Lukas Wunner , Keith Busch Subject: [PATCH 11/16] PCI/portdrv: Restore pci state on slot reset Date: Fri, 31 Aug 2018 15:26:34 -0600 Message-Id: <20180831212639.10196-12-keith.busch@intel.com> X-Mailer: git-send-email 2.13.6 In-Reply-To: <20180831212639.10196-1-keith.busch@intel.com> References: <20180831212639.10196-1-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 port's config space may be reset after a link reset, which is often implementated as a secondary bus reset. We need to restore the config space in order for downstream devices to successfully use it. Signed-off-by: Keith Busch --- drivers/pci/pcie/portdrv_pci.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/pci/pcie/portdrv_pci.c b/drivers/pci/pcie/portdrv_pci.c index b1deab941f68..7b5b3d7ded5b 100644 --- a/drivers/pci/pcie/portdrv_pci.c +++ b/drivers/pci/pcie/portdrv_pci.c @@ -174,7 +174,9 @@ static int slot_reset_iter(struct device *device, void *data) static pci_ers_result_t pcie_portdrv_slot_reset(struct pci_dev *dev) { + pci_restore_state(dev); device_for_each_child(&dev->dev, dev, slot_reset_iter); + pci_save_state(dev); return PCI_ERS_RESULT_RECOVERED; }