is it useful testing __LINK_STATE_RX_SCHED in dev_close()?

[wyb]

cpu0 calling netif_rx_schedule_prep(), cpu1 calling dev_close():

cpu0: testing __LINK_STATE_START, already set
cpu1: clear__LINK_STATE_START
cpu1: testing __LINK_STATE_RX_SCHED, not set
cpu0: set __LINK_STATE_RX_SCHED
cpu0: enter net poll, ...

when cpu1 return from dev_close(),__LINK_STATE_RX_SCHED is still set.


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