diff options
| -rw-r--r-- | include/net/tcp.h | 5 | ||||
| -rw-r--r-- | net/ipv4/tcp_output.c | 8 |
2 files changed, 9 insertions, 4 deletions
diff --git a/include/net/tcp.h b/include/net/tcp.h index cdd0050b97a..6e392babda4 100644 --- a/include/net/tcp.h +++ b/include/net/tcp.h @@ -1229,6 +1229,11 @@ static inline struct sk_buff *tcp_write_queue_next(struct sock *sk, struct sk_bu for (; (skb != (struct sk_buff *)&(sk)->sk_write_queue);\ skb = skb->next) +#define tcp_for_write_queue_from_safe(skb, tmp, sk) \ + for (tmp = skb->next; \ + (skb != (struct sk_buff *)&(sk)->sk_write_queue); \ + skb = tmp, tmp = skb->next) + static inline struct sk_buff *tcp_send_head(struct sock *sk) { return sk->sk_send_head; diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c index b41176f380d..7d8583a15d0 100644 --- a/net/ipv4/tcp_output.c +++ b/net/ipv4/tcp_output.c @@ -1350,9 +1350,7 @@ static int tcp_mtu_probe(struct sock *sk) tcp_insert_write_queue_before(nskb, skb, sk); len = 0; - while (len < probe_size) { - next = tcp_write_queue_next(sk, skb); - + tcp_for_write_queue_from_safe(skb, next, sk) { copy = min_t(int, skb->len, probe_size - len); if (nskb->ip_summed) skb_copy_bits(skb, 0, skb_put(nskb, copy), copy); @@ -1381,7 +1379,9 @@ static int tcp_mtu_probe(struct sock *sk) } len += copy; - skb = next; + + if (len >= probe_size) + break; } tcp_init_tso_segs(sk, nskb, nskb->len); |