dccp: remove unnecessary codes in ipv6.c
opt always equals np->opts, so it is meaningless to define opt, and
check if opt does not equal np->opts and then try to free opt.
Signed-off-by: RongQing.Li <roy.qing.li@gmail.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/dccp/ipv6.c b/net/dccp/ipv6.c
index 9991be0..02162cf 100644
--- a/net/dccp/ipv6.c
+++ b/net/dccp/ipv6.c
@@ -239,7 +239,6 @@
struct inet6_request_sock *ireq6 = inet6_rsk(req);
struct ipv6_pinfo *np = inet6_sk(sk);
struct sk_buff *skb;
- struct ipv6_txoptions *opt = NULL;
struct in6_addr *final_p, final;
struct flowi6 fl6;
int err = -1;
@@ -255,9 +254,8 @@
fl6.fl6_sport = inet_rsk(req)->loc_port;
security_req_classify_flow(req, flowi6_to_flowi(&fl6));
- opt = np->opt;
- final_p = fl6_update_dst(&fl6, opt, &final);
+ final_p = fl6_update_dst(&fl6, np->opt, &final);
dst = ip6_dst_lookup_flow(sk, &fl6, final_p, false);
if (IS_ERR(dst)) {
@@ -274,13 +272,11 @@
&ireq6->loc_addr,
&ireq6->rmt_addr);
fl6.daddr = ireq6->rmt_addr;
- err = ip6_xmit(sk, skb, &fl6, opt, np->tclass);
+ err = ip6_xmit(sk, skb, &fl6, np->opt, np->tclass);
err = net_xmit_eval(err);
}
done:
- if (opt != NULL && opt != np->opt)
- sock_kfree_s(sk, opt, opt->tot_len);
dst_release(dst);
return err;
}
@@ -475,7 +471,6 @@
struct inet_sock *newinet;
struct dccp6_sock *newdp6;
struct sock *newsk;
- struct ipv6_txoptions *opt;
if (skb->protocol == htons(ETH_P_IP)) {
/*
@@ -520,7 +515,6 @@
return newsk;
}
- opt = np->opt;
if (sk_acceptq_is_full(sk))
goto out_overflow;
@@ -532,7 +526,7 @@
memset(&fl6, 0, sizeof(fl6));
fl6.flowi6_proto = IPPROTO_DCCP;
fl6.daddr = ireq6->rmt_addr;
- final_p = fl6_update_dst(&fl6, opt, &final);
+ final_p = fl6_update_dst(&fl6, np->opt, &final);
fl6.saddr = ireq6->loc_addr;
fl6.flowi6_oif = sk->sk_bound_dev_if;
fl6.fl6_dport = inet_rsk(req)->rmt_port;
@@ -597,11 +591,8 @@
* Yes, keeping reference count would be much more clever, but we make
* one more one thing there: reattach optmem to newsk.
*/
- if (opt != NULL) {
- newnp->opt = ipv6_dup_options(newsk, opt);
- if (opt != np->opt)
- sock_kfree_s(sk, opt, opt->tot_len);
- }
+ if (np->opt != NULL)
+ newnp->opt = ipv6_dup_options(newsk, np->opt);
inet_csk(newsk)->icsk_ext_hdr_len = 0;
if (newnp->opt != NULL)
@@ -627,8 +618,6 @@
dst_release(dst);
out:
NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_LISTENDROPS);
- if (opt != NULL && opt != np->opt)
- sock_kfree_s(sk, opt, opt->tot_len);
return NULL;
}