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由 Eric Dumazet 提交于
Followup of commit ef885afb (net: use rcu_barrier() in rollback_registered_many) dst_dev_event() scans a garbage dst list that might be feeded by various network notifiers at device dismantle time. Its important to call dst_dev_event() after other notifiers, or we might enter the infamous msleep(250) in netdev_wait_allrefs(), and wait one second before calling again call_netdevice_notifiers(NETDEV_UNREGISTER, dev) to properly remove last device references. Use priority -10 to let dst_dev_notifier be called after other network notifiers (they have the default 0 priority) Reported-by: NBen Greear <greearb@candelatech.com> Reported-by: NNicolas Dichtel <nicolas.dichtel@6wind.com> Reported-by: NOctavian Purdila <opurdila@ixiacom.com> Reported-by: NBenjamin LaHaise <bcrl@kvack.org> Tested-by: NBen Greear <greearb@candelatech.com> Signed-off-by: NEric Dumazet <eric.dumazet@gmail.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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