From 8d2f6746f7f82e1aee2dc40a937b5954cfc73414 Mon Sep 17 00:00:00 2001

From: Kyle McMartin <kyle@mcmartin.ca>

Date: Sun, 17 Oct 2010 15:55:32 -0400

Subject: [PATCH] dmar: disable if ricoh multifunction detected

---

 drivers/pci/intel-iommu.c |   10 ++++++++++

 1 files changed, 10 insertions(+), 0 deletions(-)

diff --git a/drivers/pci/intel-iommu.c b/drivers/pci/intel-iommu.c

index 8e499e8..076c5de 100644

--- a/drivers/pci/intel-iommu.c

+++ b/drivers/pci/intel-iommu.c

@@ -3755,6 +3755,18 @@ static void __devinit quirk_iommu_rwbf(struct pci_dev *dev)

 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2a40, quirk_iommu_rwbf);

+/* https://bugzilla.redhat.com/show_bug.cgi?id=605888 */

+static void __devinit quirk_ricoh_multifunction(struct pci_dev *dev)

+{

+	printk(KERN_INFO "intel_iommu: broken Ricoh device %04X detected, disabling...\n",

+		dev->device);

+	dmar_disabled = 1;

+}

+DECLARE_PCI_FIXUP_HEADER(0x1180, 0xe822, quirk_ricoh_multifunction);

+DECLARE_PCI_FIXUP_HEADER(0x1180, 0xe230, quirk_ricoh_multifunction);

+DECLARE_PCI_FIXUP_HEADER(0x1180, 0xe832, quirk_ricoh_multifunction);

+DECLARE_PCI_FIXUP_HEADER(0x1180, 0xe476, quirk_ricoh_multifunction);

+

 /* On Tylersburg chipsets, some BIOSes have been known to enable the

    ISOCH DMAR unit for the Azalia sound device, but not give it any

    TLB entries, which causes it to deadlock. Check for that.  We do

-- 

1.7.3.1