linux-kernel - Re: Regression in 3.10.80 vs. 3.10.79

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Date:	Thu, 11 Jun 2015 01:23:32 +0200
From:	"Rafael J. Wysocki" <rjw@...ysocki.net>
To:	Roland Dreier <roland@...estorage.com>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	"Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
	George McCollister <george.mccollister@...il.com>,
	ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
	Bjorn Helgaas <bhelgaas@...gle.com>
Subject: Re: Regression in 3.10.80 vs. 3.10.79

On Tuesday, June 09, 2015 04:51:35 PM Roland Dreier wrote:
> On Tue, Jun 9, 2015 at 4:43 PM, Roland Dreier <roland@...estorage.com> wrote:
> > I understand that the change here fixed another regression, but I'm
> > wondering if there's a way to make everyone happy here?  I can provide
> > debugging info from my system as required...
> 
> Maybe sent my mail too quickly, as I have some thoughts after looking
> at the code.
> 
> From the link order, drivers/acpi init wll be called before
> drivers/pnp init, right?  In my case, the acpi resources ("ACPI
> PM1a_EVT_BLK") etc are under a pnp bus.  But if acpi requests the
> resources first, then pnp can't request the enclosing range.
> 
> Is the right fix to make sure the pnp init happens before acpi
> requests resources?

I need to have a deeper look at things.

Can you please file a bug at bugzilla.kernel.org to track this and attach
the output of acpidump from the affected system in there?

Rafael

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