1 files changed, 6 insertions, 3 deletions

diff --git a/include/net/tcp.h b/include/net/tcp.h
index a385797f160a..ef8f9d4dae85 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -736,9 +736,7 @@ static inline __u32 tcp_current_ssthresh(const struct sock *sk)
 
 static inline void tcp_sync_left_out(struct tcp_sock *tp)
 {
-        if (tp->rx_opt.sack_ok &&
-            (tp->sacked_out >= tp->packets_out - tp->lost_out))
-                tp->sacked_out = tp->packets_out - tp->lost_out;
+        BUG_ON(tp->sacked_out + tp->lost_out > tp->packets_out);
         tp->left_out = tp->sacked_out + tp->lost_out;
 }
 
@@ -1201,9 +1199,14 @@ static inline struct sk_buff *tcp_send_head(struct sock *sk)
 
 static inline void tcp_advance_send_head(struct sock *sk, struct sk_buff *skb)
 {
+        struct tcp_sock *tp = tcp_sk(sk);
+
         sk->sk_send_head = skb->next;
         if (sk->sk_send_head == (struct sk_buff *)&sk->sk_write_queue)
                 sk->sk_send_head = NULL;
+        /* Don't override Nagle indefinately with F-RTO */
+        if (tp->frto_counter == 2)
+                tp->frto_counter = 3;
 }
 
 static inline void tcp_check_send_head(struct sock *sk, struct sk_buff *skb_unlinked)