From nobody Thu Sep 11 14:16:32 2025 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2C665C77B7A for ; Sun, 11 Jun 2023 17:19:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233280AbjFKRTU (ORCPT ); Sun, 11 Jun 2023 13:19:20 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43328 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229636AbjFKRTR (ORCPT ); Sun, 11 Jun 2023 13:19:17 -0400 Received: from angie.orcam.me.uk (angie.orcam.me.uk [78.133.224.34]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 0981BE5F for ; Sun, 11 Jun 2023 10:19:15 -0700 (PDT) Received: by angie.orcam.me.uk (Postfix, from userid 500) id 0EA1A9200B4; Sun, 11 Jun 2023 19:19:15 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by angie.orcam.me.uk (Postfix) with ESMTP id 0B5499200B3; Sun, 11 Jun 2023 18:19:15 +0100 (BST) Date: Sun, 11 Jun 2023 18:19:14 +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=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 01/14] PCI: pciehp: 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 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Use `link_active_reporting' to determine whether Data Link Layer Link=20 Active Reporting is available rather than re-retrieving the capability. Signed-off-by: Maciej W. Rozycki Reviewed-by: Lukas Wunner --- NB this has been compile-tested only with PPC64LE and x86-64 configurations. No change from v8. Changes from v7: - Add Reviewed-by: tag by Lukas Wunner. - Reorder from 6/7. No change from v6. New change in v6. --- drivers/pci/hotplug/pciehp_hpc.c | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-) linux-pcie-link-active-reporting-hpc.diff Index: linux-macro/drivers/pci/hotplug/pciehp_hpc.c =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D --- linux-macro.orig/drivers/pci/hotplug/pciehp_hpc.c +++ linux-macro/drivers/pci/hotplug/pciehp_hpc.c @@ -984,7 +984,7 @@ static inline int pcie_hotplug_depth(str struct controller *pcie_init(struct pcie_device *dev) { struct controller *ctrl; - u32 slot_cap, slot_cap2, link_cap; + u32 slot_cap, slot_cap2; u8 poweron; struct pci_dev *pdev =3D dev->port; struct pci_bus *subordinate =3D pdev->subordinate; @@ -1030,9 +1030,6 @@ struct controller *pcie_init(struct pcie if (dmi_first_match(inband_presence_disabled_dmi_table)) ctrl->inband_presence_disabled =3D 1; =20 - /* Check if Data Link Layer Link Active Reporting is implemented */ - pcie_capability_read_dword(pdev, PCI_EXP_LNKCAP, &link_cap); - /* Clear all remaining event bits in Slot Status register. */ pcie_capability_write_word(pdev, PCI_EXP_SLTSTA, PCI_EXP_SLTSTA_ABP | PCI_EXP_SLTSTA_PFD | @@ -1051,7 +1048,7 @@ struct controller *pcie_init(struct pcie FLAG(slot_cap, PCI_EXP_SLTCAP_EIP), FLAG(slot_cap, PCI_EXP_SLTCAP_NCCS), FLAG(slot_cap2, PCI_EXP_SLTCAP2_IBPD), - FLAG(link_cap, PCI_EXP_LNKCAP_DLLLARC), + FLAG(pdev->link_active_reporting, true), pdev->broken_cmd_compl ? " (with Cmd Compl erratum)" : ""); =20 /*