Hi all,

I think I found the reason for the Rx status FIFO overrun nic hang:
If the Rx fifo overflows, the nic sets RxStatusFIFOOver _instead_ of
IntrRxIntr.
Thus netdev_rx is never called, the rx ring is never refilled, nic
hangs.

The attached patch adds proper OOM handling to natsemi.c.
I've also copied the simpler netdev_close locking from ns83820.c.

--
	Manfred