diff --git a/[refs] b/[refs]
index e58f72c53a73..7a47eba3f257 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: d0b03bd1c6725a3463290d7f9626e4b583518a5a
+refs/heads/master: 924b6231edfaf1e764ffb4f97ea382bf4facff58
diff --git a/trunk/drivers/pci/intel-iommu.c b/trunk/drivers/pci/intel-iommu.c
index f3eebd2b2d72..6262c198e56e 100644
--- a/trunk/drivers/pci/intel-iommu.c
+++ b/trunk/drivers/pci/intel-iommu.c
@@ -477,11 +477,16 @@ static struct intel_iommu *device_to_iommu(u8 bus, u8 devfn)
 		if (drhd->ignored)
 			continue;
 
-		for (i = 0; i < drhd->devices_cnt; i++)
+		for (i = 0; i < drhd->devices_cnt; i++) {
 			if (drhd->devices[i] &&
 			    drhd->devices[i]->bus->number == bus &&
 			    drhd->devices[i]->devfn == devfn)
 				return drhd->iommu;
+			if (drhd->devices[i]->subordinate &&
+			    drhd->devices[i]->subordinate->number <= bus &&
+			    drhd->devices[i]->subordinate->subordinate >= bus)
+				return drhd->iommu;
+		}
 
 		if (drhd->include_all)
 			return drhd->iommu;