Commit 332dd96f authored by Eric Dumazet's avatar Eric Dumazet Committed by David S. Miller
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net/dst: dst_dev_event() called after other notifiers

Followup of commit ef885afb

 (net: use rcu_barrier() in

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: default avatarBen Greear <>
Reported-by: default avatarNicolas Dichtel <>
Reported-by: default avatarOctavian Purdila <>
Reported-by: default avatarBenjamin LaHaise <>
Tested-by: default avatarBen Greear <>
Signed-off-by: default avatarEric Dumazet <>
Signed-off-by: default avatarDavid S. Miller <>
parent 88f8a5e3
......@@ -370,6 +370,7 @@ static int dst_dev_event(struct notifier_block *this, unsigned long event,
static struct notifier_block dst_dev_notifier = {
.notifier_call = dst_dev_event,
.priority = -10, /* must be called after other network notifiers */
void __init dst_init(void)
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