tcp: fix tcp_xmit_retransmit_queue() after rbtree introduction

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I tried to hard avoiding a call to rb_first() (via tcp_rtx_queue_head)
in tcp_xmit_retransmit_queue(). But this was probably too bold.

Quoting Yuchung :

We might miss re-arming the RTO if tp->retransmit_skb_hint is not NULL.
This can happen when RACK marks the first packet lost again and resets
tp->retransmit_skb_hint for example (tcp_rack_mark_skb_lost())

Fixes: 75c119afe1 ("tcp: implement rb-tree based retransmit queue")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Eric Dumazet 2017-10-16 19:38:35 -07:00 • committed by David S. Miller

parent b082af73bf

commit b9f1f1ce86

1 changed files with 3 additions and 6 deletions

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net/ipv4/tcp_output.c

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