After the first trylock fail, retrying immediately is
not advised as there is a high probability of failing
to acquire the lock again. This optimization makes sense.

Cc: Jay Vosburgh <jv@jvosburgh.net>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Paolo Abeni <pabeni@redhat.com>
Cc: Simon Horman <horms@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Andrew Lunn <andrew+netdev@lunn.ch>
Cc: Nikolay Aleksandrov <razor@blackwall.org>
Cc: Hangbin Liu <redacted>
Cc: Jason Xing <redacted>
Signed-off-by: Tonghao Zhang <redacted>
---
v2-4:
- no change
v1:
- splitted from: https://patchwork.kernel.org/project/netdevbpf/patch/20251118090431.35654-1-tonghao@bamaicloud.com/
- this patch only skip the 2nd rtnl lock.
- add this patch to series
---
 drivers/net/bonding/bond_main.c | 16 +++++++++-------
 1 file changed, 9 insertions(+), 7 deletions(-)

diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
index 8be7f52e847c..b835f63d2871 100644
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c

@@ -3756,7 +3756,7 @@ static bool bond_ab_arp_probe(struct bonding *bond)
 
 static void bond_activebackup_arp_mon(struct bonding *bond)
 {
-	bool should_notify_rtnl = false;
+	bool should_notify_rtnl;
 	int delta_in_ticks;
 
 	delta_in_ticks = msecs_to_jiffies(bond->params.arp_interval);

@@ -3784,13 +3784,11 @@ static void bond_activebackup_arp_mon(struct bonding *bond)
 	should_notify_rtnl = bond_ab_arp_probe(bond);
 	rcu_read_unlock();
 
-re_arm:
-	if (bond->params.arp_interval)
-		queue_delayed_work(bond->wq, &bond->arp_work, delta_in_ticks);
-
 	if (bond->send_peer_notif || should_notify_rtnl) {
-		if (!rtnl_trylock())
-			return;
+		if (!rtnl_trylock()) {
+			delta_in_ticks = 1;
+			goto re_arm;
+		}
 
 		if (bond->send_peer_notif) {
 			if (bond_should_notify_peers(bond))

@@ -3805,6 +3803,10 @@ static void bond_activebackup_arp_mon(struct bonding *bond)
 
 		rtnl_unlock();
 	}
+
+re_arm:
+	if (bond->params.arp_interval)
+		queue_delayed_work(bond->wq, &bond->arp_work, delta_in_ticks);
 }
 
 static void bond_arp_monitor(struct work_struct *work)

-- 
2.34.1