mac_link state

Hello,

1) Is it true that even after specifying mac_link_update(adapter->mach, LINK_STATE_UNKNOWN),
ethernet driver xmit routine can still get packets from stack. Application I am using is netperf. 
2) Will it not create any problem for OS like creating backpressure in its Queues because I keep getting
mbufs even after indicating LINK_STATE_UNKOWN and I return those mbufs from xmit. All these packets may
end up in OS  Queues.
3) Is there any thing more to stop getting packets apart from doing LINK_STATE_UNKNOWN/DOWN.

Thanks
Raghu.
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