mlx4_en: Validate port up prior to transmitting

We might try to use resources which were not activated.

Signed-off-by: Yevgeny Petrilin <yevgenyp@mellanox.co.il>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/mlx4/en_tx.c b/drivers/net/mlx4/en_tx.c
index 580968f..3deabd1 100644 (file)
--- a/drivers/net/mlx4/en_tx.c
+++ b/drivers/net/mlx4/en_tx.c
@@ -612,6 +612,9 @@ netdev_tx_t mlx4_en_xmit(struct sk_buff *skb, struct net_device *dev)
        int lso_header_size;
        void *fragptr;
 
+       if (!priv->port_up)
+               goto tx_drop;
+
        real_size = get_real_size(skb, dev, &lso_header_size);
        if (unlikely(!real_size))
                goto tx_drop;