}
/* Have enough data in the send queue to probe? */
- len = 0;
- if ((skb = tcp_send_head(sk)) == NULL)
- return -1;
- while ((len += skb->len) < size_needed && !tcp_skb_is_last(sk, skb))
- skb = tcp_write_queue_next(sk, skb);
- if (len < size_needed)
+ if (tp->write_seq - tp->snd_nxt < size_needed)
return -1;
if (tp->snd_wnd < size_needed)