stephen hemminger 1821f7cd65 net: allow netif_carrier to be called safely from IRQ
As reported by Ben Greer and Froncois Romieu. The code path in
the netif_carrier code leads it to try and disable
a late workqueue to reenable it immediately
netif_carrier_on
-> linkwatch_fire_event
   -> linkwatch_schedule_work
      -> cancel_delayed_work
         -> del_timer_sync

If __cancel_delayed_work is used instead then there is no
problem of waiting for running linkwatch_event.

There is a race between linkwatch_event running re-scheduling
but it is harmless to schedule an extra scan of the linkwatch queue.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-07-22 17:01:14 -07:00
..
2011-07-14 14:44:32 -07:00
2010-07-12 12:57:55 -07:00
2010-11-28 18:24:14 -08:00
2010-07-12 12:57:55 -07:00
2011-05-22 21:01:22 -04:00