Re: O2 hangs on reboot and powerdown

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

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Hello,

On Jan 9, 2008, at 21:16, Jared D. McNeill wrote:

> On 9-Jan-08, at 7:52 PM, Michael Lorenz wrote:
> > 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.
>
> This is correct -- shutdown hooks need to nuked in favour of pmf  
> handlers for dependencies to work properly. Good find!

Hrm, something is still wrong - calling ahc_suspend() on ahc1 runs  
into a NULL pointer dereference for some reason. Some typo prevented  
it from being called yesterday :/

have fun
Michael
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