From 1f2cd845d3827412e82bf26dde0abca332ede402 Mon Sep 17 00:00:00 2001 From: "David S. Miller" Date: Mon, 28 Oct 2013 00:11:22 -0400 Subject: Revert "Merge branch 'bonding_monitor_locking'" This reverts commit 4d961a101e032b4bf223b279b4b35bc77576f5a8, reversing changes made to a00f6fcc7d0c62a91768d9c4ccba4c7d64fbbce3. Revert bond locking changes, they cause regressions and Veaceslav Falico doesn't like how the commit messages were done at all. Signed-off-by: David S. Miller --- drivers/net/bonding/bond_alb.c | 20 ++++++++++++++++---- 1 file changed, 16 insertions(+), 4 deletions(-) (limited to 'drivers/net/bonding/bond_alb.c') diff --git a/drivers/net/bonding/bond_alb.c b/drivers/net/bonding/bond_alb.c index 5d79f5e529e0..02872405d35d 100644 --- a/drivers/net/bonding/bond_alb.c +++ b/drivers/net/bonding/bond_alb.c @@ -1495,13 +1495,11 @@ void bond_alb_monitor(struct work_struct *work) struct list_head *iter; struct slave *slave; - if (!rtnl_trylock()) - goto re_arm; + read_lock(&bond->lock); if (!bond_has_slaves(bond)) { bond_info->tx_rebalance_counter = 0; bond_info->lp_counter = 0; - rtnl_unlock(); goto re_arm; } @@ -1550,6 +1548,16 @@ void bond_alb_monitor(struct work_struct *work) if (bond_info->primary_is_promisc && (++bond_info->rlb_promisc_timeout_counter >= RLB_PROMISC_TIMEOUT)) { + /* + * dev_set_promiscuity requires rtnl and + * nothing else. Avoid race with bond_close. + */ + read_unlock(&bond->lock); + if (!rtnl_trylock()) { + read_lock(&bond->lock); + goto re_arm; + } + bond_info->rlb_promisc_timeout_counter = 0; /* If the primary was set to promiscuous mode @@ -1558,6 +1566,9 @@ void bond_alb_monitor(struct work_struct *work) */ dev_set_promiscuity(bond->curr_active_slave->dev, -1); bond_info->primary_is_promisc = 0; + + rtnl_unlock(); + read_lock(&bond->lock); } if (bond_info->rlb_rebalance) { @@ -1580,9 +1591,10 @@ void bond_alb_monitor(struct work_struct *work) } } - rtnl_unlock(); re_arm: queue_delayed_work(bond->wq, &bond->alb_work, alb_delta_in_ticks); + + read_unlock(&bond->lock); } /* assumption: called before the slave is attached to the bond -- cgit v1.2.3