Re: mpt(4) timeout recovery improvements

[Edgar Fuß <ef%math.uni-bonn.de@localhost>]

> Could somebody please review it, especially whether I got the locking 
> etc. right?
I'm still eager for someone with an understanding of NetBSD device drivers 
to comment on what I've done.

From my experiments, I know that the patch does ~TRT for my MPT hardware, 
but I'm pretty afraid I could have introduced some dumb race condition, 
resource leakage, locking issue or whatever beginner's mistake one can make.