K 10
svn:author
V 6
marius
K 8
svn:date
V 27
2011-07-25T19:13:51.231989Z
K 7
svn:log
V 273
MFC: r223986

- Expand the scope of the lock in the interrupt routine to close races with
  checking IFF_DRV_RUNNING and simplify the code. This also involves holding
  the driver lock in the rx_ch callout.
- Just use ifp instead of sc->sc_ifp.

Submitted by:	jhb (mostly)

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