From patchwork Sun Feb 5 15:49:12 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: 1737741 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=lists.ozlabs.org (client-ip=2404:9400:2:0:216:3eff:fee1:b9f1; helo=lists.ozlabs.org; envelope-from=linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org; receiver=) Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2404:9400:2:0:216:3eff:fee1:b9f1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-384) server-digest SHA384) (No client certificate requested) by legolas.ozlabs.org (Postfix) with ESMTPS id 4P8vGH0P6xz23r2 for ; Mon, 6 Feb 2023 02:59:19 +1100 (AEDT) Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4P8vGG6wz3z3fL7 for ; Mon, 6 Feb 2023 02:59:18 +1100 (AEDT) X-Original-To: linuxppc-dev@lists.ozlabs.org Delivered-To: linuxppc-dev@lists.ozlabs.org Authentication-Results: lists.ozlabs.org; spf=none (no SPF record) smtp.mailfrom=orcam.me.uk (client-ip=78.133.224.34; helo=angie.orcam.me.uk; envelope-from=macro@orcam.me.uk; receiver=) X-Greylist: delayed 545 seconds by postgrey-1.36 at boromir; Mon, 06 Feb 2023 02:58:07 AEDT Received: from angie.orcam.me.uk (angie.orcam.me.uk [78.133.224.34]) by lists.ozlabs.org (Postfix) with ESMTP id 4P8vDv1dkGz3c3w for ; Mon, 6 Feb 2023 02:58:07 +1100 (AEDT) Received: by angie.orcam.me.uk (Postfix, from userid 500) id 97BD39200C0; Sun, 5 Feb 2023 16:49:12 +0100 (CET) Received: from localhost (localhost [127.0.0.1]) by angie.orcam.me.uk (Postfix) with ESMTP id 910D59200BF; Sun, 5 Feb 2023 15:49:12 +0000 (GMT) Date: Sun, 5 Feb 2023 15:49:12 +0000 (GMT) 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 Subject: [PATCH v6 4/7] 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-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: =?utf-8?q?Pali_Roh=C3=A1r?= , David Abdurachmanov , linux-rdma@vger.kernel.org, Mika Westerberg , linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, Alex Williamson , Lukas Wunner , linux-pci@vger.kernel.org, Stefan Roese , Jim Wilson , netdev@vger.kernel.org Errors-To: linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" 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. 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; }