RDMA/cxgb4: Initialize reserved fields in a FW work request

Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
diff --git a/drivers/infiniband/hw/cxgb4/qp.c b/drivers/infiniband/hw/cxgb4/qp.c
index 2c037e1..5a7d368 100644
--- a/drivers/infiniband/hw/cxgb4/qp.c
+++ b/drivers/infiniband/hw/cxgb4/qp.c
@@ -436,6 +436,8 @@
 	default:
 		return -EINVAL;
 	}
+	wqe->send.r3 = 0;
+	wqe->send.r4 = 0;
 
 	plen = 0;
 	if (wr->num_sge) {