tcp_metrics: use dst_dev_net_rcu()

Replace three dst_dev() with a lockdep enabled helper.

Fixes: 4a6ce2b6f2ec ("net: introduce a new function dst_dev_put()")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Link: https://patch.msgid.link/20250828195823.3958522-7-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/net/ipv4/tcp_metrics.c b/net/ipv4/tcp_metrics.c
index 03c068ea27b6ad3283b8365f31706c11ecdd07f2..10e86f1008e9d9c340eee0ecdefd7f21bd84bd5b 100644 (file)
--- a/net/ipv4/tcp_metrics.c
+++ b/net/ipv4/tcp_metrics.c
@@ -170,7 +170,7 @@ static struct tcp_metrics_block *tcpm_new(struct dst_entry *dst,
        struct net *net;
 
        spin_lock_bh(&tcp_metrics_lock);
-       net = dev_net_rcu(dst_dev(dst));
+       net = dst_dev_net_rcu(dst);
 
        /* While waiting for the spin-lock the cache might have been populated
         * with this entry and so we have to check again.
@@ -273,7 +273,7 @@ static struct tcp_metrics_block *__tcp_get_metrics_req(struct request_sock *req,
                return NULL;
        }
 
-       net = dev_net_rcu(dst_dev(dst));
+       net = dst_dev_net_rcu(dst);
        hash ^= net_hash_mix(net);
        hash = hash_32(hash, tcp_metrics_hash_log);
 
@@ -318,7 +318,7 @@ static struct tcp_metrics_block *tcp_get_metrics(struct sock *sk,
        else
                return NULL;
 
-       net = dev_net_rcu(dst_dev(dst));
+       net = dst_dev_net_rcu(dst);
        hash ^= net_hash_mix(net);
        hash = hash_32(hash, tcp_metrics_hash_log);