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-rw-r--r--net/ipv4/tcp.c13
1 files changed, 11 insertions, 2 deletions
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index be35415..2ba73bf 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -756,8 +756,17 @@ static inline int select_size(struct sock *sk, struct tcp_sock *tp)
{
int tmp = tp->mss_cache_std;
- if (sk->sk_route_caps & NETIF_F_SG)
- tmp = 0;
+ if (sk->sk_route_caps & NETIF_F_SG) {
+ if (sk->sk_route_caps & NETIF_F_TSO)
+ tmp = 0;
+ else {
+ int pgbreak = SKB_MAX_HEAD(MAX_TCP_HEADER);
+
+ if (tmp >= pgbreak &&
+ tmp <= pgbreak + (MAX_SKB_FRAGS - 1) * PAGE_SIZE)
+ tmp = pgbreak;
+ }
+ }
return tmp;
}
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