Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932722AbcDBB0X (ORCPT ); Fri, 1 Apr 2016 21:26:23 -0400 Received: from youngberry.canonical.com ([91.189.89.112]:54170 "EHLO youngberry.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932523AbcDBAzz (ORCPT ); Fri, 1 Apr 2016 20:55:55 -0400 From: Kamal Mostafa To: linux-kernel@vger.kernel.org, stable@vger.kernel.org, kernel-team@lists.ubuntu.com Cc: Bjorn Helgaas , Kamal Mostafa Subject: [PATCH 3.19.y-ckt 074/170] x86/PCI: Mark Broadwell-EP Home Agent & PCU as having non-compliant BARs Date: Fri, 1 Apr 2016 17:52:40 -0700 Message-Id: <1459558456-24452-75-git-send-email-kamal@canonical.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1459558456-24452-1-git-send-email-kamal@canonical.com> References: <1459558456-24452-1-git-send-email-kamal@canonical.com> X-Extended-Stable: 3.19 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1360 Lines: 40 3.19.8-ckt18 -stable review patch. If anyone has any objections, please let me know. ---8<------------------------------------------------------------ From: Bjorn Helgaas commit b894157145e4ac7598d7062bc93320898a5e059e upstream. The Home Agent and PCU PCI devices in Broadwell-EP have a non-BAR register where a BAR should be. We don't know what the side effects of sizing the "BAR" would be, and we don't know what address space the "BAR" might appear to describe. Mark these devices as having non-compliant BARs so the PCI core doesn't touch them. Signed-off-by: Bjorn Helgaas Tested-by: Andi Kleen Signed-off-by: Kamal Mostafa --- arch/x86/pci/fixup.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/arch/x86/pci/fixup.c b/arch/x86/pci/fixup.c index 9a2b710..f16af96 100644 --- a/arch/x86/pci/fixup.c +++ b/arch/x86/pci/fixup.c @@ -553,3 +553,10 @@ static void twinhead_reserve_killing_zone(struct pci_dev *dev) } } DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x27B9, twinhead_reserve_killing_zone); + +static void pci_bdwep_bar(struct pci_dev *dev) +{ + dev->non_compliant_bars = 1; +} +DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x6fa0, pci_bdwep_bar); +DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x6fc0, pci_bdwep_bar); -- 2.7.4