From 47ca8be2fedfc13018ba9e337421d209b256f789 Mon Sep 17 00:00:00 2001 From: Bjorn Helgaas Date: Fri, 26 Feb 2016 09:15:11 -0600 Subject: [PATCH] x86/PCI: Mark Broadwell-EP Home Agent & PCU as having non-compliant BARs Orabug: stable_rc4 [ Upstream commit b894157145e4ac7598d7062bc93320898a5e059e ] 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 CC: stable@vger.kernel.org Signed-off-by: Sasha Levin (cherry picked from commit fcc5834794fdcb62637a1deb25bff5787bf73757) Signed-off-by: Dan Duval --- 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 9a2b7101ae8af..f16af96c60a27 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); -- 2.50.1