Re: CVS commit: src/sys/kern

[Manuel Bouyer <bouyer%antioche.eu.org@localhost>]

On Thu, Feb 21, 2008 at 04:58:20PM +0100, Joerg Sonnenberger wrote:
> On Thu, Feb 21, 2008 at 02:57:54PM +0100, Manuel Bouyer wrote:
> > We had a similar issues some time ago, where disk would be spun down on
> > reboot or halt without powerdown. My conclusion was that drivers needs to
> > know what kind of suspend we're doing (suspend, reboot, halt, poweroff) to
> > take appropriate action (which may not always be to power off the device).
> > At this time, the disk issue was fixed by a hack using global variable.
> > But I still believe drivers needs to get more informations from PMF to
> > know what's going on.
> 
> I still haven't seen any other example that needs to distinguish between

I think Matthias has given some. You seems to assume the firmware can
power on devices that we powered off during shutdown, and that's probably
not always true. For example, I don't think the Sun Openfirmware
expects PCI devices to be in D3 state when the OS gives back control after
a shutdown -h. 

-- 
Manuel Bouyer, LIP6, Universite Paris VI.           
Manuel.Bouyer%lip6.fr@localhost
     NetBSD: 26 ans d'experience feront toujours la difference
--