Re: O2 hangs on reboot and powerdown

[Michael Lorenz <macallan%NetBSD.org@localhost>]

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Hello,

On Jan 5, 2008, at 19:20, Izumi Tsutsui wrote:

> macallan%NetBSD.org@localhost wrote:
>
> > Another data point - I have an ahc in a G4 mac and don't get this
> > kind of problem there.
>
> Hmm, happens only in case of root on sd? at ahc(4)?

I've found the problem. What happens is that ahc's shutdown hook is  
called, in turn calls ahc_shutdown(), after that pmf_system_shutdown  
calls sd's suspend handler which tries to flush caches but the  
command times out since ahc is already shut down.
So, this is not sgimips specific and will likely affect other scsi  
drivers as well.
I worked around if by removing the shutdown hook and adding suspend  
and resume handlers to ahc_pci which simply call ahc_suspend and  
ahc_resume. Since I'm not at all familiar with scsipi or the ahc  
driver - is there anything wrong with this approach? On my O2 at  
least it works.

have fun
Michael
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