diff --git a/nova/network/neutronv2/api.py b/nova/network/neutronv2/api.py
index 9eac7248ebe7..05c409323624 100644
--- a/nova/network/neutronv2/api.py
+++ b/nova/network/neutronv2/api.py
@@ -2393,7 +2393,8 @@ class API(base_api.NetworkAPI):
             # resize is happening on the same host, a new PCI device can be
             # allocated.
             vnic_type = p.get('binding:vnic_type')
-            if vnic_type in network_model.VNIC_TYPES_SRIOV:
+            if (vnic_type in network_model.VNIC_TYPES_SRIOV
+                    and migration is not None):
                 if not pci_mapping:
                     pci_mapping = self._get_pci_mapping_for_migration(context,
                         instance, migration)
diff --git a/nova/tests/unit/network/test_neutronv2.py b/nova/tests/unit/network/test_neutronv2.py
index f2e7abcb790b..9ace114057a1 100644
--- a/nova/tests/unit/network/test_neutronv2.py
+++ b/nova/tests/unit/network/test_neutronv2.py
@@ -3811,6 +3811,7 @@ class TestNeutronv2WithMock(test.TestCase):
                              'pci_vendor_info': 'old_pci_vendor_info'}},
                         {'id': 'fake-port-2',
                          'binding:host_id': instance.host}]}
+        migration = {'status': 'confirmed'}
         list_ports_mock = mock.Mock(return_value=fake_ports)
         get_client_mock.return_value.list_ports = list_ports_mock
 
@@ -3818,7 +3819,7 @@ class TestNeutronv2WithMock(test.TestCase):
         get_client_mock.return_value.update_port = update_port_mock
 
         self.api._update_port_binding_for_instance(self.context, instance,
-                                                   instance.host)
+                                                   instance.host, migration)
         # Assert that update_port is called with the binding:profile
         # corresponding to the PCI device specified.
         update_port_mock.assert_called_once_with(
@@ -3864,6 +3865,7 @@ class TestNeutronv2WithMock(test.TestCase):
                             {'pci_slot': '0000:0a:00.1',
                              'physical_network': 'old_phys_net',
                              'pci_vendor_info': 'old_pci_vendor_info'}}]}
+        migration = {'status': 'confirmed'}
         list_ports_mock = mock.Mock(return_value=fake_ports)
         get_client_mock.return_value.list_ports = list_ports_mock
 
@@ -3872,7 +3874,55 @@ class TestNeutronv2WithMock(test.TestCase):
                           self.api._update_port_binding_for_instance,
                           self.context,
                           instance,
-                          instance.host)
+                          instance.host,
+                          migration)
+
+    @mock.patch.object(pci_whitelist.Whitelist, 'get_devspec')
+    @mock.patch.object(neutronapi, 'get_client', return_value=mock.Mock())
+    def test_update_port_bindings_for_instance_with_pci_no_migration(self,
+                                            get_client_mock,
+                                            get_pci_device_devspec_mock):
+        self.api._has_port_binding_extension = mock.Mock(return_value=True)
+
+        devspec = mock.Mock()
+        devspec.get_tags.return_value = {'physical_network': 'physnet1'}
+        get_pci_device_devspec_mock.return_value = devspec
+
+        instance = fake_instance.fake_instance_obj(self.context)
+        instance.migration_context = objects.MigrationContext()
+        instance.migration_context.old_pci_devices = objects.PciDeviceList(
+            objects=[objects.PciDevice(vendor_id='1377',
+                                       product_id='0047',
+                                       address='0000:0a:00.1',
+                                       compute_node_id=1,
+                                       request_id='1234567890')])
+        instance.migration_context.new_pci_devices = objects.PciDeviceList(
+            objects=[objects.PciDevice(vendor_id='1377',
+                                       product_id='0047',
+                                       address='0000:0b:00.1',
+                                       compute_node_id=2,
+                                       request_id='1234567890')])
+        instance.pci_devices = instance.migration_context.old_pci_devices
+
+        fake_ports = {'ports': [
+                        {'id': 'fake-port-1',
+                         'binding:vnic_type': 'direct',
+                         neutronapi.BINDING_HOST_ID: instance.host,
+                         neutronapi.BINDING_PROFILE:
+                            {'pci_slot': '0000:0a:00.1',
+                             'physical_network': 'phys_net',
+                             'pci_vendor_info': 'pci_vendor_info'}}]}
+        list_ports_mock = mock.Mock(return_value=fake_ports)
+        get_client_mock.return_value.list_ports = list_ports_mock
+
+        update_port_mock = mock.Mock()
+        get_client_mock.return_value.update_port = update_port_mock
+
+        # Try to update the port binding with no migration object.
+        self.api._update_port_binding_for_instance(self.context, instance,
+                                                   instance.host)
+        # No ports should be updated if the port's pci binding did not change.
+        update_port_mock.assert_not_called()
 
     def test_get_pci_mapping_for_migration(self):
         instance = fake_instance.fake_instance_obj(self.context)