Re: 2.6.28-rc2 hates my e1000e

From: Linus Torvalds
Date: Fri Oct 31 2008 - 12:47:16 EST




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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