net_sched/sfq: update hierarchical backlog when drop packet
When sfq_enqueue() drops head packet or packet from another queue it have to update backlog at upper qdiscs too. Fixes: 2ccccf5f ("net_sched: update hierarchical backlog too") Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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