linux-kernel - PNP PS/2 probing racy?

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Message-ID: <20100128135405.GA28931@basil.fritz.box>
Date:	Thu, 28 Jan 2010 14:54:05 +0100
From:	Andi Kleen <andi@...stfloor.org>
To:	dmitry.torokhov@...il.com, linux-kernel@...r.kernel.org
Subject: PNP PS/2 probing racy?

Hi,

I noticed that on one test system of machine when booting the same
kernel I get:

PNP: No PS/2 controller found. Probing ports directly.
serio: i8042 KBD port at 0x60,0x64 irq 1
serio: i8042 AUX port at 0x60,0x64 irq 12

and sometimes on another boot

PNP: PS/2 Controller [PNP0303:PS2K,PNP0f03:PS2M] at 0x60,0x64 irq 1,12

Since I presume the BIOS does not change, is it possible the Linux
procedure for this PNP probe is racy? I haven't checked the code so far.

Full boot logs for both cases:

http://halobates.de/config/dmesg-pnprace-1
http://halobates.de/config/dmesg-pnprace-2

-Andi
-- 
ak@...ux.intel.com -- Speaking for myself only.
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