Phonet: remove useless locking in device cleanup

Incoming packets and sockets are already gone.
The netdevice notifier is unregistered under the RTNL lock
There remains a race with the rtnetlink handlers unregistration, but it
is a generic RTNL issue that was already present before this change.

Signed-off-by: Rémi Denis-Courmont <remi.denis-courmont@nokia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/phonet/pn_dev.c b/net/phonet/pn_dev.c
index fd41810..3e24c05 100644 (file)
--- a/net/phonet/pn_dev.c
+++ b/net/phonet/pn_dev.c
@@ -204,13 +204,8 @@ void phonet_device_exit(void)
        struct phonet_device *pnd, *n;
 
        rtnl_unregister_all(PF_PHONET);
-       rtnl_lock();
-       spin_lock_bh(&pndevs.lock);
+       unregister_netdevice_notifier(&phonet_device_notifier);
 
        list_for_each_entry_safe(pnd, n, &pndevs.list, list)
                __phonet_device_free(pnd);
-
-       spin_unlock_bh(&pndevs.lock);
-       rtnl_unlock();
-       unregister_netdevice_notifier(&phonet_device_notifier);
 }