pci: dmar/intr_remapping/iov use physfn to search drhd

when virtfn is used, we should use physfn to find correct drhd

Signed-off-by Yinghai Lu <[email protected]>

---
 drivers/pci/dmar.c           |    5 +++++
 2 files changed, 12 insertions(+), 1 deletion(-)

Index: linux-2.6/drivers/pci/dmar.c
===================================================================

drivers/pci/dmar.c +5 -0

@@ -493,6 +493,11 @@ dmar_find_matched_drhd_unit(struct pci_d
 	struct dmar_drhd_unit *dmaru = NULL;
 	struct acpi_dmar_hardware_unit *drhd;
 
+#ifdef CONFIG_PCI_IOV
+	if (dev->is_virtfn)
+		dev = dev->physfn;
+#endif
+
 	list_for_each_entry(dmaru, &dmar_drhd_units, list) {
 		drhd = container_of(dmaru->hdr,
 				    struct acpi_dmar_hardware_unit,