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bonding: verify if we still have slaves in bond_3ad_unbind_slave()

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After commit 1f718f0f4f ("bonding: populate
neighbour's private on enslave"), we've moved the unlinking of the slave
to the earliest position possible - so that nobody will see an
half-uninited slave.

However, bond_3ad_unbind_slave() relied that, even while removing the last
slave, it is still accessible - via __get_first_agg() (and, eventually,
bond_first_slave()).

Fix that by verifying if the aggregator return is an actual aggregator, but
not NULL.

CC: Jay Vosburgh <fubar@us.ibm.com>
CC: Andy Gospodarek <andy@greyhouse.net>
Signed-off-by: Veaceslav Falico <vfalico@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Veaceslav Falico 2013-09-27 15:10:58 +02:00 committed by David S. Miller
parent 23c147e026
commit 746844931e
1 changed files with 3 additions and 1 deletions
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4
drivers/net/bonding/bond_3ad.c
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@ -2056,7 +2056,9 @@ void bond_3ad_unbind_slave(struct slave *slave)
pr_info("%s: Removing an active aggregator\n",
slave->bond->dev->name);
// select new active aggregator
ad_agg_selection_logic(__get_first_agg(port));
temp_aggregator = __get_first_agg(port);
if (temp_aggregator)
ad_agg_selection_logic(temp_aggregator);
}
}
}