linux-kernel - Re: [Patch 1/1] x86 pci: Add option to not assign BAR's if not already assigned

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Message-ID: <4BFFF8F8.1070502@sgi.com>
Date:	Fri, 28 May 2010 10:10:16 -0700
From:	Mike Travis <travis@....com>
To:	"H. Peter Anvin" <hpa@...or.com>
CC:	Ingo Molnar <mingo@...hat.com>,
	Thomas Gleixner <tglx@...utronix.de>, x86@...nel.org,
	Jesse Barnes <jbarnes@...tuousgeek.org>,
	Bjorn Helgaas <bjorn.helgaas@...com>,
	Jacob Pan <jacob.jun.pan@...el.com>, Tejun Heo <tj@...nel.org>,
	Mike Habeck <habeck@....com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [Patch 1/1] x86 pci: Add option to not assign BAR's if not already
 assigned



H. Peter Anvin wrote:
> On 05/28/2010 09:53 AM, Mike Travis wrote:
>> Any further consideration for this patch, or has it been rejected?
> 
> Well, it's really up to Jesse, but as far as I can see, this patch is a
> net loss of functionality and doesn't actually add anything.  Without
> this patch, some resources that were not assigned by BIOS will be
> unreachable.  With this patch, *all* resources that were not assigned by
> BIOS will be unreachable...
> 
> 	-hpa
> 

Apparently you're missing the point of the patch?  The patch is needed
because BIOS is purposely not assigning I/O BAR's to devices that won't
use them, freeing up the resource for devices that do need them.  Where
is the "all" resources that are not reachable?

Thanks,
Mike
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