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net: hold instance lock around NETDEV_DOWN/GOING_DOWN

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Mirror what call_netdevice_register_net_notifiers does but for the
teardown. Cover only DOWN and GOING_DOWN. UNREGISTER is still unlocked
because of the SW devices using dev_xxx methods.

Signed-off-by: Stanislav Fomichev <sdf@fomichev.me>
Link: https://patch.msgid.link/20260702224150.3730033-2-sdf@fomichev.me
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
This commit is contained in:
Stanislav Fomichev 2026-07-02 15:41:45 -07:00 committed by Paolo Abeni
parent 997bfb05c9
commit 5326fefb9f
1 changed files with 2 additions and 0 deletions
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2
net/core/dev.c
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@ -1912,9 +1912,11 @@ static void call_netdevice_unregister_notifiers(struct notifier_block *nb,
struct net_device *dev)
{
if (dev->flags & IFF_UP) {
netdev_lock_ops(dev);
call_netdevice_notifier(nb, NETDEV_GOING_DOWN,
dev);
call_netdevice_notifier(nb, NETDEV_DOWN, dev);
netdev_unlock_ops(dev);
}
call_netdevice_notifier(nb, NETDEV_UNREGISTER, dev);
}