1 files changed, 64 insertions, 69 deletions

diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
index c5944f1a4f9..b2b9109b671 100644
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -550,7 +550,7 @@ down:
 /*
  * Get link speed and duplex from the slave's base driver
  * using ethtool. If for some reason the call fails or the
- * values are invalid, fake speed and duplex to 100/Full
+ * values are invalid, set speed and duplex to -1,
  * and return error.
  */
 static int bond_update_speed_duplex(struct slave *slave)
@@ -560,9 +560,8 @@ static int bond_update_speed_duplex(struct slave *slave)
 	u32 slave_speed;
 	int res;
 
-	/* Fake speed and duplex */
-	slave->speed = SPEED_100;
-	slave->duplex = DUPLEX_FULL;
+	slave->speed = -1;
+	slave->duplex = -1;
 
 	res = __ethtool_get_settings(slave_dev, &ecmd);
 	if (res < 0)
@@ -773,9 +772,6 @@ static void bond_resend_igmp_join_requests(struct bonding *bond)
 
 	read_lock(&bond->lock);
 
-	if (bond->kill_timers)
-		goto out;
-
 	/* rejoin all groups on bond device */
 	__bond_resend_igmp_join_requests(bond->dev);
 
@@ -789,9 +785,9 @@ static void bond_resend_igmp_join_requests(struct bonding *bond)
 			__bond_resend_igmp_join_requests(vlan_dev);
 	}
 
-	if ((--bond->igmp_retrans > 0) && !bond->kill_timers)
+	if (--bond->igmp_retrans > 0)
 		queue_delayed_work(bond->wq, &bond->mcast_work, HZ/5);
-out:
+
 	read_unlock(&bond->lock);
 }
 
@@ -1754,16 +1750,7 @@ int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev)
 		new_slave->link  = BOND_LINK_DOWN;
 	}
 
-	if (bond_update_speed_duplex(new_slave) &&
-	    (new_slave->link != BOND_LINK_DOWN)) {
-		pr_warning("%s: Warning: failed to get speed and duplex from %s, assumed to be 100Mb/sec and Full.\n",
-			   bond_dev->name, new_slave->dev->name);
-
-		if (bond->params.mode == BOND_MODE_8023AD) {
-			pr_warning("%s: Warning: Operation of 802.3ad mode requires ETHTOOL support in base driver for proper aggregator selection.\n",
-				   bond_dev->name);
-		}
-	}
+	bond_update_speed_duplex(new_slave);
 
 	if (USES_PRIMARY(bond->params.mode) && bond->params.primary[0]) {
 		/* if there is a primary slave, remember it */
@@ -2517,10 +2504,11 @@ void bond_mii_monitor(struct work_struct *work)
 	struct bonding *bond = container_of(work, struct bonding,
 					    mii_work.work);
 	bool should_notify_peers = false;
+	unsigned long delay;
 
 	read_lock(&bond->lock);
-	if (bond->kill_timers)
-		goto out;
+
+	delay = msecs_to_jiffies(bond->params.miimon);
 
 	if (bond->slave_cnt == 0)
 		goto re_arm;
@@ -2529,7 +2517,15 @@ void bond_mii_monitor(struct work_struct *work)
 
 	if (bond_miimon_inspect(bond)) {
 		read_unlock(&bond->lock);
-		rtnl_lock();
+
+		/* Race avoidance with bond_close cancel of workqueue */
+		if (!rtnl_trylock()) {
+			read_lock(&bond->lock);
+			delay = 1;
+			should_notify_peers = false;
+			goto re_arm;
+		}
+
 		read_lock(&bond->lock);
 
 		bond_miimon_commit(bond);
@@ -2540,14 +2536,18 @@ void bond_mii_monitor(struct work_struct *work)
 	}
 
 re_arm:
-	if (bond->params.miimon && !bond->kill_timers)
-		queue_delayed_work(bond->wq, &bond->mii_work,
-				   msecs_to_jiffies(bond->params.miimon));
-out:
+	if (bond->params.miimon)
+		queue_delayed_work(bond->wq, &bond->mii_work, delay);
+
 	read_unlock(&bond->lock);
 
 	if (should_notify_peers) {
-		rtnl_lock();
+		if (!rtnl_trylock()) {
+			read_lock(&bond->lock);
+			bond->send_peer_notif++;
+			read_unlock(&bond->lock);
+			return;
+		}
 		netdev_bonding_change(bond->dev, NETDEV_NOTIFY_PEERS);
 		rtnl_unlock();
 	}
@@ -2789,9 +2789,6 @@ void bond_loadbalance_arp_mon(struct work_struct *work)
 
 	delta_in_ticks = msecs_to_jiffies(bond->params.arp_interval);
 
-	if (bond->kill_timers)
-		goto out;
-
 	if (bond->slave_cnt == 0)
 		goto re_arm;
 
@@ -2888,9 +2885,9 @@ void bond_loadbalance_arp_mon(struct work_struct *work)
 	}
 
 re_arm:
-	if (bond->params.arp_interval && !bond->kill_timers)
+	if (bond->params.arp_interval)
 		queue_delayed_work(bond->wq, &bond->arp_work, delta_in_ticks);
-out:
+
 	read_unlock(&bond->lock);
 }
 
@@ -3131,9 +3128,6 @@ void bond_activebackup_arp_mon(struct work_struct *work)
 
 	read_lock(&bond->lock);
 
-	if (bond->kill_timers)
-		goto out;
-
 	delta_in_ticks = msecs_to_jiffies(bond->params.arp_interval);
 
 	if (bond->slave_cnt == 0)
@@ -3143,7 +3137,15 @@ void bond_activebackup_arp_mon(struct work_struct *work)
 
 	if (bond_ab_arp_inspect(bond, delta_in_ticks)) {
 		read_unlock(&bond->lock);
-		rtnl_lock();
+
+		/* Race avoidance with bond_close flush of workqueue */
+		if (!rtnl_trylock()) {
+			read_lock(&bond->lock);
+			delta_in_ticks = 1;
+			should_notify_peers = false;
+			goto re_arm;
+		}
+
 		read_lock(&bond->lock);
 
 		bond_ab_arp_commit(bond, delta_in_ticks);
@@ -3156,13 +3158,18 @@ void bond_activebackup_arp_mon(struct work_struct *work)
 	bond_ab_arp_probe(bond);
 
 re_arm:
-	if (bond->params.arp_interval && !bond->kill_timers)
+	if (bond->params.arp_interval)
 		queue_delayed_work(bond->wq, &bond->arp_work, delta_in_ticks);
-out:
+
 	read_unlock(&bond->lock);
 
 	if (should_notify_peers) {
-		rtnl_lock();
+		if (!rtnl_trylock()) {
+			read_lock(&bond->lock);
+			bond->send_peer_notif++;
+			read_unlock(&bond->lock);
+			return;
+		}
 		netdev_bonding_change(bond->dev, NETDEV_NOTIFY_PEERS);
 		rtnl_unlock();
 	}
@@ -3203,6 +3210,7 @@ static int bond_slave_netdev_event(unsigned long event,
 {
 	struct net_device *bond_dev = slave_dev->master;
 	struct bonding *bond = netdev_priv(bond_dev);
+	struct slave *slave = NULL;
 
 	switch (event) {
 	case NETDEV_UNREGISTER:
@@ -3213,20 +3221,16 @@ static int bond_slave_netdev_event(unsigned long event,
 				bond_release(bond_dev, slave_dev);
 		}
 		break;
+	case NETDEV_UP:
 	case NETDEV_CHANGE:
-		if (bond->params.mode == BOND_MODE_8023AD || bond_is_lb(bond)) {
-			struct slave *slave;
+		slave = bond_get_slave_by_dev(bond, slave_dev);
+		if (slave) {
+			u32 old_speed = slave->speed;
+			u8  old_duplex = slave->duplex;
 
-			slave = bond_get_slave_by_dev(bond, slave_dev);
-			if (slave) {
-				u32 old_speed = slave->speed;
-				u8  old_duplex = slave->duplex;
-
-				bond_update_speed_duplex(slave);
-
-				if (bond_is_lb(bond))
-					break;
+			bond_update_speed_duplex(slave);
 
+			if (bond->params.mode == BOND_MODE_8023AD) {
 				if (old_speed != slave->speed)
 					bond_3ad_adapter_speed_changed(slave);
 				if (old_duplex != slave->duplex)
@@ -3424,8 +3428,6 @@ static int bond_open(struct net_device *bond_dev)
 	struct slave *slave;
 	int i;
 
-	bond->kill_timers = 0;
-
 	/* reset slave->backup and slave->inactive */
 	read_lock(&bond->lock);
 	if (bond->slave_cnt > 0) {
@@ -3494,33 +3496,30 @@ static int bond_close(struct net_device *bond_dev)
 
 	bond->send_peer_notif = 0;
 
-	/* signal timers not to re-arm */
-	bond->kill_timers = 1;
-
 	write_unlock_bh(&bond->lock);
 
 	if (bond->params.miimon) {  /* link check interval, in milliseconds. */
-		cancel_delayed_work(&bond->mii_work);
+		cancel_delayed_work_sync(&bond->mii_work);
 	}
 
 	if (bond->params.arp_interval) {  /* arp interval, in milliseconds. */
-		cancel_delayed_work(&bond->arp_work);
+		cancel_delayed_work_sync(&bond->arp_work);
 	}
 
 	switch (bond->params.mode) {
 	case BOND_MODE_8023AD:
-		cancel_delayed_work(&bond->ad_work);
+		cancel_delayed_work_sync(&bond->ad_work);
 		break;
 	case BOND_MODE_TLB:
 	case BOND_MODE_ALB:
-		cancel_delayed_work(&bond->alb_work);
+		cancel_delayed_work_sync(&bond->alb_work);
 		break;
 	default:
 		break;
 	}
 
 	if (delayed_work_pending(&bond->mcast_work))
-		cancel_delayed_work(&bond->mcast_work);
+		cancel_delayed_work_sync(&bond->mcast_work);
 
 	if (bond_is_lb(bond)) {
 		/* Must be called only after all
@@ -4367,26 +4366,22 @@ static void bond_setup(struct net_device *bond_dev)
 
 static void bond_work_cancel_all(struct bonding *bond)
 {
-	write_lock_bh(&bond->lock);
-	bond->kill_timers = 1;
-	write_unlock_bh(&bond->lock);
-
 	if (bond->params.miimon && delayed_work_pending(&bond->mii_work))
-		cancel_delayed_work(&bond->mii_work);
+		cancel_delayed_work_sync(&bond->mii_work);
 
 	if (bond->params.arp_interval && delayed_work_pending(&bond->arp_work))
-		cancel_delayed_work(&bond->arp_work);
+		cancel_delayed_work_sync(&bond->arp_work);
 
 	if (bond->params.mode == BOND_MODE_ALB &&
 	    delayed_work_pending(&bond->alb_work))
-		cancel_delayed_work(&bond->alb_work);
+		cancel_delayed_work_sync(&bond->alb_work);
 
 	if (bond->params.mode == BOND_MODE_8023AD &&
 	    delayed_work_pending(&bond->ad_work))
-		cancel_delayed_work(&bond->ad_work);
+		cancel_delayed_work_sync(&bond->ad_work);
 
 	if (delayed_work_pending(&bond->mcast_work))
-		cancel_delayed_work(&bond->mcast_work);
+		cancel_delayed_work_sync(&bond->mcast_work);
 }
 
 /*