net/mlx4_en: mlx4_en_xmit() reads ring->cons once, and ahead of time to avoid stalls

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Amir Vadai <amirv@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
1 file changed