linux-kernel - Re: [PATCH] x86/PCI: setup data may be in highmem

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Message-ID: <20130528164801.GA2345@srcf.ucam.org>
Date:	Tue, 28 May 2013 17:48:01 +0100
From:	Matthew Garrett <mjg59@...f.ucam.org>
To:	Bjorn Helgaas <bhelgaas@...gle.com>
Cc:	Matt Fleming <matt@...sole-pimps.org>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"x86@...nel.org" <x86@...nel.org>,
	Matt Fleming <matt.fleming@...el.com>,
	Seth Forshee <seth.forshee@...onical.com>,
	Jesse Barnes <jbarnes@...tuousgeek.org>, stable@...r.kernel.org
Subject: Re: [PATCH] x86/PCI: setup data may be in highmem

On Tue, May 28, 2013 at 10:31:51AM -0600, Bjorn Helgaas wrote:
> On Tue, May 28, 2013 at 5:36 AM, Matt Fleming <matt@...sole-pimps.org> wrote:
> > On Fri, 24 May, at 08:38:10AM, Bjorn Helgaas wrote:
> >> pcibios_add_device() is mostly called at boot-time, when
> >> early_ioremap() probably works well.  But it's also called when we
> >> hot-add devices later, and it looks like early_ioremap() will then
> >> generate warnings because "system_state != SYSTEM_BOOTING".
> >
> > Oops. Good point. Is there any reason we can't use ioremap()?
> 
> I assume Matthew had some reason for avoiding that in the first place,
> so I hope he'll chime in.

I have no recollection of why I did it that way. If this is all 
happening late enough for ioremap() to work then that sounds fine.

-- 
Matthew Garrett | mjg59@...f.ucam.org
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