1 files changed, 11 insertions, 0 deletions

diff --git a/drivers/pci/intr_remapping.c b/drivers/pci/intr_remapping.c
index 32e55c7a9805..bb642cc5e18c 100644
--- a/drivers/pci/intr_remapping.c
+++ b/drivers/pci/intr_remapping.c
@@ -230,6 +230,17 @@ struct intel_iommu *map_ioapic_to_ir(int apic)
         return NULL;
 }
 
+struct intel_iommu *map_dev_to_ir(struct pci_dev *dev)
+{
+        struct dmar_drhd_unit *drhd;
+
+        drhd = dmar_find_matched_drhd_unit(dev);
+        if (!drhd)
+                return NULL;
+
+        return drhd->iommu;
+}
+
 int free_irte(int irq)
 {
         int index, i;