VIA 82C686B SouthBridge fixup in linux/drivers/pci/quirks.c

[Jeff S Wheeler]

Hi, I am not subscribed to the list.  Please CC me on replies.

The VIA686B SouthBridge bug workaround is not activated on motherboards
which have a VIA 82C686B that needs fixing, but not a VIA NorthBridge.  For
example, my Asus A7M266 has an AMD 761 NorthBridge, and the table at the end
of linux/drivers/pci/quirks.c thus does not attempt to apply the fix.
Someone suggested a fix against 2.4.4 in this thread, however it has not all
been fixed on 2.4.5 nor 2.4.5-ac22 (current, I believe).

Below is a patch to the __initdata table which causes the fix to be applied
based on detection of the buggy SouthBridge, and *not* the NorthBridge which
is commonly used with it.  This is the correct behavior, and was suggested
by someone during the thread I reference, however this aspect of the fix was
overlooked.

http://mailman.real-time.com/pipermail/linux-kernel/Week-of-Mon-20010430/032
013.html

---
Jeff S Wheeler           [e-mail]
Software Development        Five Elements, Inc

--- linux-2.4.5/drivers/pci/quirks.c.orig       Fri Jun 29 20:24:09 2001
+++ linux-2.4.5/drivers/pci/quirks.c    Fri Jun 29 20:58:14 2001
@@ -358,7 +358,7 @@
        { PCI_FIXUP_FINAL,      PCI_VENDOR_ID_INTEL,
PCI_DEVICE_ID_INTEL_82443BX_2,  quirk_natoma },
        { PCI_FIXUP_FINAL,      PCI_VENDOR_ID_SI,
PCI_DEVICE_ID_SI_5597,          quirk_nopcipci },
        { PCI_FIXUP_FINAL,      PCI_VENDOR_ID_SI,
PCI_DEVICE_ID_SI_496,           quirk_nopcipci },
-       { PCI_FIXUP_FINAL,      PCI_VENDOR_ID_VIA,
PCI_DEVICE_ID_VIA_8363_0,       quirk_vialatency },
+       { PCI_FIXUP_FINAL,      PCI_VENDOR_ID_VIA,
PCI_DEVICE_ID_VIA_82C686,       quirk_vialatency },
        { PCI_FIXUP_FINAL,      PCI_VENDOR_ID_VIA,
PCI_DEVICE_ID_VIA_82C597_0,     quirk_viaetbf },
        { PCI_FIXUP_HEADER,     PCI_VENDOR_ID_VIA,
PCI_DEVICE_ID_VIA_82C597_0,     quirk_vt82c598_id },
        { PCI_FIXUP_HEADER,     PCI_VENDOR_ID_VIA,
PCI_DEVICE_ID_VIA_82C586_3,     quirk_vt82c586_acpi },