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path: root/drivers/pci/intr_remapping.c
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Diffstat (limited to 'drivers/pci/intr_remapping.c')
-rw-r--r--drivers/pci/intr_remapping.c17
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/pci/intr_remapping.c b/drivers/pci/intr_remapping.c
index 0d202d73a1a..a84686b2478 100644
--- a/drivers/pci/intr_remapping.c
+++ b/drivers/pci/intr_remapping.c
@@ -499,6 +499,23 @@ int __init enable_intr_remapping(int eim)
struct dmar_drhd_unit *drhd;
int setup = 0;
+ for_each_drhd_unit(drhd) {
+ struct intel_iommu *iommu = drhd->iommu;
+
+ /*
+ * Clear previous faults.
+ */
+ dmar_fault(-1, iommu);
+
+ /*
+ * Disable intr remapping and queued invalidation, if already
+ * enabled prior to OS handover.
+ */
+ disable_intr_remapping(iommu);
+
+ dmar_disable_qi(iommu);
+ }
+
/*
* check for the Interrupt-remapping support
*/