Re: [PATCH] Driver core: leave runtime PM enabled during system shutdown

[Rafael J. Wysocki]

On Tuesday, December 06, 2011, Greg KH wrote:
> On Tue, Dec 06, 2011 at 10:26:14AM -0500, Alan Stern wrote:
> > Disabling all runtime PM during system shutdown turns out not to be a
> > good idea, because some devices may need to be woken up from a
> > low-power state at that time.
> > 
> > The whole point of disabling runtime PM for system shutdown was to
> > prevent untimely runtime-suspend method calls.  This patch (as1504)
> > accomplishes the same result by incrementing the usage count for each
> > device and waiting for ongoing runtime-PM callbacks to finish.  This
> > is what we already do during system suspend and hibernation, which
> > makes sense since the shutdown method is pretty much a legacy analog
> > of the pm->poweroff method.
> > 
> > This fixes a regression on some OMAP systems.
> > 
> > Signed-off-by: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
> > Reported-by: NeilBrown <neilb@xxxxxxx>
> > CC: Chen Peter-B29397 <B29397@xxxxxxxxxxxxx>
> 
> Acked-by: Greg Kroah-Hartman <gregkh@xxxxxxx>
> 
> Rafael, you will take this in your tree, right?

Yes, I will, thanks!
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