linux-kernel - Re: [PATCH] reduce AER init error information

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Date:	Tue, 29 May 2007 16:10:14 +0200
From:	Michal Piotrowski <michal.k.k.piotrowski@...il.com>
To:	"Zhang, Yanmin" <yanmin_zhang@...ux.intel.com>
CC:	LKML <linux-kernel@...r.kernel.org>, lenb@...nel.org,
	us15@...inf.tu-dresden.de, gregkh@...e.de, davej@...hat.com,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH] reduce AER init error information

Hi all,

Zhang, Yanmin napisał(a):
> PCI-Express AER support in kernel requires BIOS to provide _OSC support
> to allow the AER Root port service driver to request for native control
> of AER. If a root port supports AER capablity, but BIOS doesn't provide
> _OSC for it, aerdriver will print many debug information to system console.
> Below is a log example.
> 
> *******************Error information example************
> Evaluate _OSC Set fails. Status = 0x0005
> Evaluate _OSC Set fails. Status = 0x0005
> aer_init: AER service init fails - Run ACPI _OSC fails
> aer: probe of 0000:00:02.0:pcie01 failed with error 2
> Evaluate _OSC Set fails. Status = 0x0005
> Evaluate _OSC Set fails. Status = 0x0005
> aer_init: AER service init fails - Run ACPI _OSC fails
> aer: probe of 0000:00:04.0:pcie01 failed with error 2
> Evaluate _OSC Set fails. Status = 0x0005
> Evaluate _OSC Set fails. Status = 0x0005
> aer_init: AER service init fails - Run ACPI _OSC fails
> aer: probe of 0000:00:06.0:pcie01 failed with error 2
> ******************End of Error information example******
> 
> 
> As _OSC is an optional capability of BIOS, such error information looks
> like overly-verbosed. The patch against kernel 2.6.21 changes it to just
> print one line report messages if aerdriver fails to attach the root port
> service device.
> 
> Below is an example of new output.
> AER service couldn't init device 0000:00:02.0:pcie01 - no _OSC support
> 
> 
> Signed-off-by: Zhang Yanmin <yanmin.zhang@...el.com>
> 
> ---
> 
[..]

This patch fixes a 2.6.21 regression. Please add this to the -stable and mainline queue.

Regards,
Michal

-- 
"Najbardziej brakowało mi twojego milczenia."
-- Andrzej Sapkowski "Coś więcej"
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