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authorBjorn Helgaas <bhelgaas@google.com>2016-02-26 09:15:11 -0600
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2016-04-12 09:08:33 -0700
commit54fda475686cfb9a90bb558c0fa590e644503432 (patch)
tree66184b59b39ede4d4cba9af445c1bc652305fae9
parentf6724209df88ec1a760d036b71b8f871b1556785 (diff)
x86/PCI: Mark Broadwell-EP Home Agent & PCU as having non-compliant BARs
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 <bhelgaas@google.com> Tested-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--arch/x86/pci/fixup.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/x86/pci/fixup.c b/arch/x86/pci/fixup.c
index e58565556703..0ae7e9fa348d 100644
--- a/arch/x86/pci/fixup.c
+++ b/arch/x86/pci/fixup.c
@@ -540,3 +540,10 @@ 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);