IB/ipath: Implement IB_EVENT_QP_LAST_WQE_REACHED

This patch implements the IB_EVENT_QP_LAST_WQE_REACHED event which is
needed by ib_ipoib to destroy the QP when used in connected mode.

Signed-off-by: Ralph Campbell <ralph.campbell@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
diff --git a/drivers/infiniband/hw/ipath/ipath_verbs.h b/drivers/infiniband/hw/ipath/ipath_verbs.h
index 619ad72..a197229 100644
--- a/drivers/infiniband/hw/ipath/ipath_verbs.h
+++ b/drivers/infiniband/hw/ipath/ipath_verbs.h
@@ -672,7 +672,7 @@
 
 int ipath_destroy_qp(struct ib_qp *ibqp);
 
-void ipath_error_qp(struct ipath_qp *qp, enum ib_wc_status err);
+int ipath_error_qp(struct ipath_qp *qp, enum ib_wc_status err);
 
 int ipath_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
 		    int attr_mask, struct ib_udata *udata);