tree dac4959510095dfabdcd5b04186e8c9050cf90ec
parent 045f7b3b0005bf30ad8d664c7651d816e2650cd2
author Matthijs Kooijman <matthijs@stdin.nl> 1320036793 +0000
committer David S. Miller <davem@davemloft.net> 1320184263 -0400

vlan: Don't propagate flag changes on down interfaces.

When (de)configuring a vlan interface, the IFF_ALLMULTI ans IFF_PROMISC
flags are cleared or set on the underlying interface. So, if these flags
are changed on a vlan interface that is not up, the flags underlying
interface might be set or cleared twice.

Only propagating flag changes when a device is up makes sure this does
not happen. It also makes sure that an underlying device is not set to
promiscuous or allmulti mode for a vlan device that is down.

Signed-off-by: Matthijs Kooijman <matthijs@stdin.nl>
Signed-off-by: David S. Miller <davem@davemloft.net>