bonding: Fix RTNL: assertion failed at net/core/rtnetlink.c for 802.3ad mode

[cascardo/linux.git] / drivers / net / bonding / bond_3ad.c

diff --git a/drivers/net/bonding/bond_3ad.c b/drivers/net/bonding/bond_3ad.c
index 6d20fbd..6826e4f 100644 (file)
--- a/drivers/net/bonding/bond_3ad.c
+++ b/drivers/net/bonding/bond_3ad.c
@@ -181,7 +181,7 @@ static inline int __agg_has_partner(struct aggregator *agg)
  */
 static inline void __disable_port(struct port *port)
 {
-       bond_set_slave_inactive_flags(port->slave);
+       bond_set_slave_inactive_flags(port->slave, BOND_SLAVE_NOTIFY_LATER);
 }
 
 /**
@@ -193,7 +193,7 @@ static inline void __enable_port(struct port *port)
        struct slave *slave = port->slave;
 
        if ((slave->link == BOND_LINK_UP) && IS_UP(slave->dev))
-               bond_set_slave_active_flags(slave);
+               bond_set_slave_active_flags(slave, BOND_SLAVE_NOTIFY_LATER);
 }
 
 /**
@@ -2062,6 +2062,7 @@ void bond_3ad_state_machine_handler(struct work_struct *work)
        struct list_head *iter;
        struct slave *slave;
        struct port *port;
+       bool should_notify_rtnl = BOND_SLAVE_NOTIFY_LATER;
 
        read_lock(&bond->lock);
        rcu_read_lock();
@@ -2119,8 +2120,25 @@ void bond_3ad_state_machine_handler(struct work_struct *work)
        }
 
 re_arm:
+       bond_for_each_slave_rcu(bond, slave, iter) {
+               if (slave->should_notify) {
+                       should_notify_rtnl = BOND_SLAVE_NOTIFY_NOW;
+                       break;
+               }
+       }
        rcu_read_unlock();
        read_unlock(&bond->lock);
+
+       if (should_notify_rtnl && rtnl_trylock()) {
+               bond_for_each_slave(bond, slave, iter) {
+                       if (slave->should_notify) {
+                               rtmsg_ifinfo(RTM_NEWLINK, slave->dev, 0,
+                                            GFP_KERNEL);
+                               slave->should_notify = 0;
+                       }
+               }
+               rtnl_unlock();
+       }
        queue_delayed_work(bond->wq, &bond->ad_work, ad_delta_in_ticks);
 }