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Message-ID: <alpine.DEB.2.21.2304060114210.13659@angie.orcam.me.uk> Date: Thu, 6 Apr 2023 01:21:22 +0100 (BST) From: "Maciej W. Rozycki" <macro@...am.me.uk> To: Bjorn Helgaas <bhelgaas@...gle.com>, Mahesh J Salgaonkar <mahesh@...ux.ibm.com>, Oliver O'Halloran <oohall@...il.com>, Michael Ellerman <mpe@...erman.id.au>, Nicholas Piggin <npiggin@...il.com>, Christophe Leroy <christophe.leroy@...roup.eu>, Saeed Mahameed <saeedm@...dia.com>, Leon Romanovsky <leon@...nel.org>, "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com> cc: Alex Williamson <alex.williamson@...hat.com>, Lukas Wunner <lukas@...ner.de>, Mika Westerberg <mika.westerberg@...ux.intel.com>, Stefan Roese <sr@...x.de>, Jim Wilson <wilson@...iptree.org>, David Abdurachmanov <david.abdurachmanov@...il.com>, Pali Rohár <pali@...nel.org>, linux-pci@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org, linux-rdma@...r.kernel.org, netdev@...r.kernel.org, linux-kernel@...r.kernel.org Subject: [PATCH v8 5/7] powerpc/eeh: Rely on `link_active_reporting' 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 <macro@...am.me.uk> --- NB this has been compile-tested only with a PPC64LE configuration. 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; }
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