On Wednesday, May 23, 2007 4:04 pm David Miller wrote: > From: Linus Torvalds <[EMAIL PROTECTED]> > 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.
I've actually seen that specific form of posted write flushing cause crashes on some machines, so yes, it sucks. Unfortunately, I don't think we have any other way of getting at extended config space on x86, unless EFI provides methods or something, but I'm not sure that would be an improvement... Jesse - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/