linux-kernel - Re: 2.6.28-rc2 hates my e1000e

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Message-ID: <alpine.LFD.2.00.0810310944260.21084@nehalem.linux-foundation.org>
Date:	Fri, 31 Oct 2008 09:46:19 -0700 (PDT)
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Yinghai Lu <yinghai@...nel.org>
cc:	Jonathan Corbet <corbet@....net>, Ingo Molnar <mingo@...e.hu>,
	Robert Hancock <hancockr@...w.ca>,
	e1000-devel@...ts.sourceforge.net,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: 2.6.28-rc2 hates my e1000e

On Fri, 31 Oct 2008, Yinghai Lu wrote:
> 
> then we don't need e820_reserve_resources_late, right?

Wrong.

Think about exactly the broken case: a buggy e820 BIOS sets the e820 map 
resource listing so that it *straddles* a real physical resource.

The fact is, the "late" part isn't because of IORESOURCE_BUSY. It's 
because FIRMWARE IS INEVITABLY A STINKING PILE OF BUGGY SH*T THAT MUST 
NOT BE ALLOWED TO SCREW UP DEVICE DISCOVERY.

Sorry for shouting, but people really need to understand this.

			Linus
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