On Sat, Feb 12, 2000 at 09:46:57AM -0800, Linus Torvalds wrote:
>It may simply be due to buggy MP tables that Windows knows about (or where
>the bugs are such that it just happens to work under Windows - not unheard
>of, as Windows and WNT tend to be the only things that gets tested).
>
>However, it may also just be the Linux MP table parsing. The code tries to
>find an exact match, and everybody thinks that that is what it should do,
>but there has certainly been tables where a fuzzy match of the PCI irq pin
>is called for. Maybe this is one of those cases.
>
>It would be good to compile a list of machines, with BIOS, manufacturer
>and southbridge information, and see what the pattern is.
>
>Alternatively, there's pre-patch-2.3.44-9 on ftp.kernel.org which corrects
>a silly oversight in the fuzzy matching in io_apic.c (the code was there
>to do the fuzzy matching, but the fuzzy match was never actually used).
>That may or may not help.
Hi Linus,
Ok, pre-patch-2.3.44-9 seems to fix my problem with USB not working with
MPS 1.4. One thing I noticed was that with 2.3.42 in MPS 1.4 mode, uhci was
being forced down to irq 5, whereas Win2k was assigning it irq 19. With
pre-patch 2.3.44-9 in MPS 1.4 mode, uhci is assigned irq19 as well.
I had a problem with pre-patch 2.3.44-9 not compiling. I had to patch
/usr/src/linux/arch/i386/kernel/pci-pc.c to get it to compile, but I'm not
sure if what I changed was correct or not. Here's a diff of my changes:
--- linux/arch/i386/kernel/pci-pc.c.orig Sat Feb 12 12:01:40 2000
+++ linux/arch/i386/kernel/pci-pc.c Sat Feb 12 12:01:57 2000
@@ -966,7 +966,7 @@
struct pci_fixup pcibios_fixups[] = {
{ PCI_FIXUP_HEADER, PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82451NX, pci_fixup_i450nx },
- { PCI_FIXUP_HEADER, PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82454GX, pci_fixup_i450gx },
+ { PCI_FIXUP_HEADER, PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82450GX, pci_fixup_i450gx },
{ PCI_FIXUP_HEADER, PCI_VENDOR_ID_RCC, PCI_DEVICE_ID_RCC_HE, pci_fixup_rcc },
{ PCI_FIXUP_HEADER, PCI_VENDOR_ID_RCC, PCI_DEVICE_ID_RCC_LE, pci_fixup_rcc },
{ PCI_FIXUP_HEADER, PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_6010, pci_fixup_compaq },
-Harold
-- I. Harold Oga | Email: ogah@cadvision.com Systems Enterprises Ltd. | Voice: (403) 244 9738 #211, 1624 16th Ave SW | Calgary, AB, T3C 1A1 | "Life Sucks, Deal with it!!"- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.rutgers.edu Please read the FAQ at http://www.tux.org/lkml/
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