[TCP]: Restore over-zealous tcp_sync_left_out-like removals

tcp_verify_left_out is useful for verifying S+L condition, so
add it back to couple of places in where the code was not
calling to tcp_sync_left_out but used own ad-hoc solution
(before the tcp_sync_left_out got removed).

Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 4 insertions, 0 deletions

diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index b11bd1624227..93823b83522b 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -1346,6 +1346,8 @@ tcp_sacktag_write_queue(struct sock *sk, struct sk_buff *ack_skb, u32 prior_snd_
                 }
         }
 
+        tcp_verify_left_out(tp);
+
         if ((reord < tp->fackets_out) && icsk->icsk_ca_state != TCP_CA_Loss &&
             (!tp->frto_highmark || after(tp->snd_una, tp->frto_highmark)))
                 tcp_update_reordering(sk, ((tp->fackets_out + 1) - reord), 0);
@@ -2121,6 +2123,8 @@ static void tcp_try_to_open(struct sock *sk, int flag)
 {
         struct tcp_sock *tp = tcp_sk(sk);
 
+        tcp_verify_left_out(tp);
+
         if (tp->retrans_out == 0)
                 tp->retrans_stamp = 0;