From patchwork Sun Jun 11 17:19:32 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Maciej W. Rozycki" X-Patchwork-Id: 1793629 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=2620:137:e000::1:20; helo=out1.vger.email; envelope-from=linux-pci-owner@vger.kernel.org; receiver=) Received: from out1.vger.email (out1.vger.email [IPv6:2620:137:e000::1:20]) by legolas.ozlabs.org (Postfix) with ESMTP id 4QfM5w2KQpz20Vx for ; Mon, 12 Jun 2023 03:20:36 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233466AbjFKRUe (ORCPT ); Sun, 11 Jun 2023 13:20:34 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44856 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233464AbjFKRU3 (ORCPT ); Sun, 11 Jun 2023 13:20:29 -0400 Received: from angie.orcam.me.uk (angie.orcam.me.uk [IPv6:2001:4190:8020::34]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id C3D9010E2; Sun, 11 Jun 2023 10:20:07 -0700 (PDT) Received: by angie.orcam.me.uk (Postfix, from userid 500) id 67DE69200C3; Sun, 11 Jun 2023 19:19:32 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by angie.orcam.me.uk (Postfix) with ESMTP id 640209200BB; Sun, 11 Jun 2023 18:19:32 +0100 (BST) Date: Sun, 11 Jun 2023 18:19:32 +0100 (BST) From: "Maciej W. Rozycki" To: Bjorn Helgaas , Mahesh J Salgaonkar , Oliver O'Halloran , Michael Ellerman , Nicholas Piggin , Christophe Leroy , Saeed Mahameed , Leon Romanovsky , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni cc: Alex Williamson , Lukas Wunner , Mika Westerberg , Stefan Roese , Jim Wilson , David Abdurachmanov , =?utf-8?q?Pali_Roh?= =?utf-8?q?=C3=A1r?= , linux-pci@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-rdma@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v9 05/14] powerpc/eeh: Rely on `link_active_reporting' In-Reply-To: Message-ID: References: User-Agent: Alpine 2.21 (DEB 202 2017-01-01) MIME-Version: 1.0 X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,SPF_HELO_NONE, SPF_NONE,T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Use `link_active_reporting' to determine whether Data Link Layer Link Active Reporting is available rather than re-retrieving the capability. Signed-off-by: Maciej W. Rozycki --- NB this has been compile-tested only with a PPC64LE configuration. No change from v8. Changes from v7: - Reorder from 4/7. No change from v6. New change in v6. --- arch/powerpc/kernel/eeh_pe.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) linux-pcie-link-active-reporting-eeh.diff Index: linux-macro/arch/powerpc/kernel/eeh_pe.c =================================================================== --- linux-macro.orig/arch/powerpc/kernel/eeh_pe.c +++ linux-macro/arch/powerpc/kernel/eeh_pe.c @@ -671,9 +671,8 @@ static void eeh_bridge_check_link(struct eeh_ops->write_config(edev, cap + PCI_EXP_LNKCTL, 2, val); /* Check link */ - eeh_ops->read_config(edev, cap + PCI_EXP_LNKCAP, 4, &val); - if (!(val & PCI_EXP_LNKCAP_DLLLARC)) { - eeh_edev_dbg(edev, "No link reporting capability (0x%08x) \n", val); + if (!edev->pdev->link_active_reporting) { + eeh_edev_dbg(edev, "No link reporting capability\n"); msleep(1000); return; }