be2net: Fix error recovery paths

When TX queues are created again after error recovery,
netif_set_real_num_tx_queues() is invoked to update number of real
TX queues created. rtnl lock needs to be held when invoking this routine.

Signed-off-by: Padmanabh Ratnakar <padmanabh.ratnakar@emulex.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/emulex/benet/be_main.c

@@ -1666,9 +1666,12 @@ static int be_tx_queues_create(struct be_adapter *adapter)
 	u8 i;
 
 	adapter->num_tx_qs = be_num_txqs_want(adapter);
-	if (adapter->num_tx_qs != MAX_TX_QS)
+	if (adapter->num_tx_qs != MAX_TX_QS) {
+		rtnl_lock();
 		netif_set_real_num_tx_queues(adapter->netdev,
 			adapter->num_tx_qs);
+		rtnl_unlock();
+	}
 
 	adapter->tx_eq.max_eqd = 0;
 	adapter->tx_eq.min_eqd = 0;