[PATCH net] tcp: fix a compile error in DBGUNDO()

[Eric Dumazet]

From: Eric Dumazet <eduma...@google.com>

If DBGUNDO() is enabled (FASTRETRANS_DEBUG > 1), a compile
error will happen, since inet6_sk(sk)->daddr became sk->sk_v6_daddr

Fixes: efe4208f47f9 ("ipv6: make lookups simpler and faster")
Signed-off-by: Eric Dumazet <eduma...@google.com>
---
 net/ipv4/tcp_input.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index 08323bd95f2a..a756b8749a26 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -2329,10 +2329,9 @@ static void DBGUNDO(struct sock *sk, const char *msg)
        }
 #if IS_ENABLED(CONFIG_IPV6)
        else if (sk->sk_family == AF_INET6) {
-               struct ipv6_pinfo *np = inet6_sk(sk);
                pr_debug("Undo %s %pI6/%u c%u l%u ss%u/%u p%u\n",
                         msg,
-                        &np->daddr, ntohs(inet->inet_dport),
+                        &sk->sk_v6_daddr, ntohs(inet->inet_dport),
                         tp->snd_cwnd, tcp_left_out(tp),
                         tp->snd_ssthresh, tp->prior_ssthresh,
                         tp->packets_out);