IB/ipath: return correct PortGUID in NodeInfo

Return the PortGUID of the correct port when responding to a NodeInfo
query.  Returning the SystemImageGUID causes issues when there are
multiple HCAs in a single system.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

drivers/infiniband/hw/ipath/ipath_mad.c

@@ -103,7 +103,7 @@ static int recv_subn_get_nodeinfo(struct ib_smp *smp,
 	/* This is already in network order */
 	nip->sys_guid = to_idev(ibdev)->sys_image_guid;
 	nip->node_guid = dd->ipath_guid;
-	nip->port_guid = nip->sys_guid;
+	nip->port_guid = dd->ipath_guid;
 	nip->partition_cap = cpu_to_be16(ipath_get_npkeys(dd));
 	nip->device_id = cpu_to_be16(dd->ipath_deviceid);
 	majrev = dd->ipath_majrev;