RDS/IW+IB: Allow max credit advertise window.

Fix hack that restricts the credit advertisement to 127.

Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Andy Grover <andy.grover@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/rds/iw_recv.c b/net/rds/iw_recv.c
index fde470f..8683f5f 100644
--- a/net/rds/iw_recv.c
+++ b/net/rds/iw_recv.c
@@ -524,7 +524,7 @@
 	}
 
 	/* Can we get a send credit? */
-	if (!rds_iw_send_grab_credits(ic, 1, &adv_credits, 0)) {
+	if (!rds_iw_send_grab_credits(ic, 1, &adv_credits, 0, RDS_MAX_ADV_CREDIT)) {
 		rds_iw_stats_inc(s_iw_tx_throttle);
 		clear_bit(IB_ACK_IN_FLIGHT, &ic->i_ack_flags);
 		return;