Re: [RFC PATCH] PCI MMCONFIG: add validation against ACPI motherboard resources

David Miller
2007-05-23T23:04:31Z

From: Linus Torvalds <torvalds@linux-foundation.org>
Date: Wed, 23 May 2007 15:16:23 -0700 (PDT)

> That crap should be seen for the crap it is! Dammit, how hard can it
> be to just admit that mmconfig isn't that great?

I knew mmconfig was broken conceptually the first time I started
seeing write posting "bug fixes" for it that would do a read back from
PCI config space via mmconfig to post the write, which of course has
potential side-effects on the device and is absolutely illegal if the
write just performed put the device into a PM state or whatever.

Truth is stranger than fiction at times.

MMCONFIG is very much an ill-conceived idea.