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-rw-r--r--net/core/dev.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/net/core/dev.c b/net/core/dev.c
index c09ff09..2c7934f 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -5686,6 +5686,10 @@ int dev_change_net_namespace(struct net_device *dev, struct net *net, const char
/* Notify protocols, that we are about to destroy
this device. They should clean all the things.
+
+ Note that dev->reg_state stays at NETREG_REGISTERED.
+ This is wanted because this way 8021q and macvlan know
+ the device is just moving and can keep their slaves up.
*/
call_netdevice_notifiers(NETDEV_UNREGISTER, dev);
call_netdevice_notifiers(NETDEV_UNREGISTER_BATCH, dev);
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