Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

[linux.git] / net / ipv4 / tcp_input.c

diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index 6660ce2a73336581e9bc00385d9fcf192a6510ca..97671bff597adb8cd2aab268f344ff3ae41a4ebb 100644 (file)
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -402,11 +402,12 @@ static int __tcp_grow_window(const struct sock *sk, const struct sk_buff *skb)
 static void tcp_grow_window(struct sock *sk, const struct sk_buff *skb)
 {
        struct tcp_sock *tp = tcp_sk(sk);
+       int room;
+
+       room = min_t(int, tp->window_clamp, tcp_space(sk)) - tp->rcv_ssthresh;
 
        /* Check #1 */
-       if (tp->rcv_ssthresh < tp->window_clamp &&
-           (int)tp->rcv_ssthresh < tcp_space(sk) &&
-           !tcp_under_memory_pressure(sk)) {
+       if (room > 0 && !tcp_under_memory_pressure(sk)) {
                int incr;
 
                /* Check #2. Increase window, if skb with such overhead
@@ -419,8 +420,7 @@ static void tcp_grow_window(struct sock *sk, const struct sk_buff *skb)
 
                if (incr) {
                        incr = max_t(int, incr, 2 * skb->len);
-                       tp->rcv_ssthresh = min(tp->rcv_ssthresh + incr,
-                                              tp->window_clamp);
+                       tp->rcv_ssthresh += min(room, incr);
                        inet_csk(sk)->icsk_ack.quick |= 1;
                }
        }