Re: [PATCH 2/8] introduce the device async action mechanism

[Pavel Machek]

Hi!

> >  During suspend-resume we know dependencies between
> > devices beforehand, at least in theory, so we can use them.
> > 
> that's why I use multiple async domains. :)
> One domain for a device group.
> 
> > In particular, we have to make sure that parent devices will not be suspended
> > until all of their children have been suspended and children devices will not
> > be resumed before the parents.
> 
> that's not enough.
> ???For examples,
> ACPI battery and EC are independent devices, but EC must be resumed
> before battery because battery driver may access some EC address space
> during resume time.

Yes, but those dependencies should be pulled from driver tree, not
adding separate dependencies infrastructure.

								Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/