linux-kernel - Re: [PATCH 2/2] eisa, PCI: init eisa early before pnp step in

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Date:	Mon, 1 Apr 2013 12:52:39 -0600
From:	Bjorn Helgaas <bhelgaas@...gle.com>
To:	Yinghai Lu <yinghai@...nel.org>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Matthew Whitehead <mwhitehe@...hat.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"Rafael J. Wysocki" <rjw@...k.pl>
Subject: Re: [PATCH 2/2] eisa, PCI: init eisa early before pnp step in

On Mon, Apr 1, 2013 at 12:25 PM, Yinghai Lu <yinghai@...nel.org> wrote:
> On Mon, Apr 1, 2013 at 11:15 AM, Bjorn Helgaas <bhelgaas@...gle.com> wrote:
>>> >> Is this a regression?  This must have worked at one time, but it seems
>> >> like we've had pnpacpi_init/isapnp_init/pnpbios_init before PCI
>> >> drivers for quite a while.
>> >
>> > Yes.
>>
>> Do you know when the regression occurred?  If you do, I'll add that
>> info to the "stable" tag.
>
> No, I don't.
>
> Looking at the current code, it should be quite before kernel was using git.
> as first drivers/Makefile in git already has pnp before eisa.
>
> Do we need to dig before 2.6.12 and 2.4?

No, I don't think we need to worry about fixing kernels that old.

But I do wonder whether we fully understand the cause.  I know EISA is
old and obsolete, but it's a little hard to believe that it's been
broken since 2.6.12 and nobody noticed.

Bjorn
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