I'm using NetBSD 4.0_BETA2 to build modular xorg packages with pkgsrc 
(local work dirs) mounted with NFS using a wpi(4) interface (i.e. 
reasonably heavy use). After a while, the network status went to inactive 
and so I got nfs send error 50. I tried to ifconfig down/ifconfig up but 
got the following errors:
wpi0: could not allocate firmware DMA memory 
wpi0: could not load firmware

The firmware was clearly already loaded as I'd built up about 60 packages 
using it!

-- 
Stephen