Merge branches 'for-3.17/upstream', 'for-3.17/cp2112', 'for-3.17/huion', 'for-3.17...

[cascardo/linux.git] / net / ipv4 / tcp_output.c

diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index ad7549f..d92bce0 100644 (file)
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -1961,10 +1961,8 @@ static bool tcp_write_xmit(struct sock *sk, unsigned int mss_now, int nonagle,
                        /* It is possible TX completion already happened
                         * before we set TSQ_THROTTLED, so we must
                         * test again the condition.
-                        * We abuse smp_mb__after_clear_bit() because
-                        * there is no smp_mb__after_set_bit() yet
                         */
-                       smp_mb__after_clear_bit();
+                       smp_mb__after_atomic();
                        if (atomic_read(&sk->sk_wmem_alloc) > limit)
                                break;
                }
@@ -2131,9 +2129,7 @@ void tcp_send_loss_probe(struct sock *sk)
        if (WARN_ON(!skb || !tcp_skb_pcount(skb)))
                goto rearm_timer;
 
-       /* Probe with zero data doesn't trigger fast recovery. */
-       if (skb->len > 0)
-               err = __tcp_retransmit_skb(sk, skb);
+       err = __tcp_retransmit_skb(sk, skb);
 
        /* Record snd_nxt for loss detection. */
        if (likely(!err))