linux-kernel - Re: [PATCH 0/3] Fix two PEIe hotplug issues

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Message-Id: <20071018105601.27d96f7e.kristen.c.accardi@intel.com>
Date:	Thu, 18 Oct 2007 10:56:01 -0700
From:	Kristen Carlson Accardi <kristen.c.accardi@...el.com>
To:	Theodore Tso <tytso@....edu>
Cc:	Mark Lord <lkml@....ca>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>, greg@...ah.com,
	pcihpd-discuss@...ts.sourceforge.net
Subject: Re: [PATCH 0/3] Fix two PEIe hotplug issues

On Thu, 18 Oct 2007 13:49:25 -0400
Theodore Tso <tytso@....edu> wrote:

> On Thu, Oct 18, 2007 at 10:06:14AM -0700, Kristen Carlson Accardi wrote:
> > No, it actually does violate the spec.  Feel free to read it yourself.
> > We are not supposed to do Native PCIe without first successfully executing
> > OSC.  Period.  If you do, you are violating the spec.
> 
> To be fair, we have violated the spec before in order to get crappy
> hardware or to work around crappy ACPI implementations.
> acpi_sleep=s3_bios for example violates the spec, but yet it is the
> only way to get certain laptops to suspend/resume correctly.  
> 
> The question to ask is whether violating the spec will lead to (a) a
> potential system hang/crash, (b) data corruption, (c) physical harm to
> the device/laptop.
> 
> Regards,
> 
> 						- Ted
> 

And the answer is most definitely yes to at least a) and c) on specific
hardware I know about.
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