tcp: remove dead code from tcp_collapse_retrans()
TCP sendmsg() no longer puts payload in skb->head,
remove some dead code from tcp_collapse_retrans().
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index c0c55a8..e1dcc93 100644
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -3045,13 +3045,9 @@ static bool tcp_collapse_retrans(struct sock *sk, struct sk_buff *skb)
BUG_ON(tcp_skb_pcount(skb) != 1 || tcp_skb_pcount(next_skb) != 1);
- if (next_skb_size) {
- if (next_skb_size <= skb_availroom(skb))
- skb_copy_bits(next_skb, 0, skb_put(skb, next_skb_size),
- next_skb_size);
- else if (!tcp_skb_shift(skb, next_skb, 1, next_skb_size))
- return false;
- }
+ if (next_skb_size && !tcp_skb_shift(skb, next_skb, 1, next_skb_size))
+ return false;
+
tcp_highest_sack_replace(sk, next_skb, skb);
/* Update sequence range on original skb. */
