On Dec 8, 2013 5:39 AM, "Marius Strobl" <mar...@alchemy.franken.de> wrote:
> On Wed, Dec 04, 2013 at 10:21:13PM -0800, Justin Hibbits wrote:
> > I've been working on the projects/pmac_pmu branch for some time now to
> > add suspend/resume as well as CPU speed change for certain PowerPC
> > machines, about a year since I created the branch, and now it's stable
> > enough that I want to merge it into HEAD, hence this request. However,
> > it does touch several drivers, turning them into "early drivers", such
> > that they can be initialized, and suspended and resumed at a different
> > time.  Saying that, I do need testing from other architectures, to make
> > sure I haven't broken anything.
> >
> > The technical details:
> >
> > To get proper ordering, I've extended the bus_generic_suspend() and
> > bus_generic_resume() to do multiple passes.  Devices which cannot be
> > enabled or disabled at the current pass level would return an EAGAIN.
> > This could possibly cause problems, since it's an addition to an
> > existing API rather than a new API to run along side it, so it needs a
> > great deal of testing.  It works fine on PowerPC, but I don't have any
> > i386/amd64 or sparc64 hardware to test it on, so would like others who
> > do to test it.  I don't think that it would impact x86 at all (testing
> > is obviously required), because the nexus is not an EARLY_DRIVER_MODULE,
> > so all devices would be handled at the same pass.  But, I do know the
> > sparc64 has an EARLY_DRIVER_MODULE() nexus, so that will likely be
> > impacted.
> >
> > Also, any comments are of course welcome.  Technical concerns are
> > obviously welcome, and I will try to address everything.
> Do you have a patch against head?
> Marius

I can generate one today.

- Justin
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