amr driver broken since March 12

[Danny Braniss]

> Danny Braniss wrote:
> >> Danny Braniss wrote:
> >>> at least for me :-)
> >>> [and sorry for the cross posting]
> >>>
> >>> old (March 12 , i know need the svn rev number but...)
> >> None of the commit activity on March 12 is jumping out at me as being 
> >> suspicious.  However, you are now the second person who has told me 
> >> about AMR problems in 7.1 recently.  If you have a precise svn change
> >> number, it would help greatly.
> >>
> >> Scott
> > my bad. the last working amr/iir is from March 12.
> > I first detected the problem sometime later, but not later than March 23.
> > So it has to be changes in that time frame.
> > 
> > both drivers are showing similar symptoms:
> > 	waiting for not busy
> > the iir goes on for ever, and it's the cam that eventually panics,
> >  run_interrupt_driven_hooks: still waiting after 300 seconds for xpt_config
> > (actually not 100% true, depending if WITNESS is on or off, it sometimes
> > just hangs).
> > the amr seems to time out:
> > 	amr0: adapter is busy
> > 
> > thanks for looking into the problem,
> > 
> > danny
> > 
> > 
> 
> Ok, here are a series of revisions to step through, in forward order.
> Make sure that you are starting with at least revision 189568.  Then,
> update to exactly the revision numbers below, recompile the kernel, and
> test:
> 
> 190087
> 190091
> 
it seems March 12 was a bit off :-)
it took some time, but I managed to close the gap:
	189100	ok
	189150	fails
I will continue tomorrow, but this should be helpful.

cheers,
	danny