IB/ipath: validate path_mig_state properly

Signed-off-by: Bryan O'Sullivan <bryan.osullivan@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

drivers/infiniband/hw/ipath/ipath_qp.c

@@ -491,7 +491,8 @@ int ipath_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
 			goto inval;
 
 	if (attr_mask & IB_QP_PATH_MIG_STATE)
-		if (attr->path_mig_state != IB_MIG_MIGRATED)
+		if (attr->path_mig_state != IB_MIG_MIGRATED &&
+		    attr->path_mig_state != IB_MIG_REARM)
 			goto inval;
 
 	switch (new_state) {