Messages in this thread Patch in this message | | | Date | Wed, 27 Sep 2006 23:05:25 +0200 | From | Michiel de Boer <> | Subject | [PATCH] Chipset addition for the VIA Southbridge workaround / quirk |
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Hi, i'm (maybe unfortunately ;) the owner of a socket 370 motherboard by DFI. It's type number is CA63-EC REV A+. According to the manual this is the exact chipset naming: VIA 82C693A/82C686B AGPset
Also built in is an Creative Labs SB Live! audio device. When i was still using windows 98, i experienced corruptions when burning DVD's, and after lengthy investigation i discovered i had a buggy southbridge.[1] Apparently the presence of the SB Live! audio device might even accelerate the problem, although it does not actually disappear when this PCI card is removed. When i moved to Linux, i decided that writing a kernel patch based on the fixup programs i found for windows 98 would be appropriate.
However, i was pleased to discover that fixup code was already present in drivers/pci/quirks.c . The only thing i had to do then was add my mother- board identifier to the bottom of the code. The patch has been tried and tested since 2.6.8, and since then it has evolved since it turned out it contained unneccessary code patches. It has also been tested without problems on the user base of the distro Kanotix[2], of which i'm a co-developer. It activates as it should when it should, fixes the corrup- tions i had when burning DVD's, and improves system behavior. It's a very small and simple patch, but it would spare me from having to patch the kernel source myself it it were to be included.
Regards, Michiel de Boer
[1] http://www.theregister.co.uk/2001/04/12/datacorruption_bug_hits_via_chipsets/ http://www.realworldtech.com/page.cfm?ArticleID=RWT051401003409 http://www.tecchannel.de/ueberblick/archiv/401770/ [2] http://www.kanotix.com
Credit: Stefan Lippers-Hollmann <s.l-h@gmx.de>, for showing me the way around in the kernel sources. Signed-off-by: Michiel Lieuwe de Boer <x@rebelhomicide.demon.nl>
diff -Nru linux-2.6.18.orig/drivers/pci/quirks.c linux-2.6.18/drivers/pci/quirks.c --- linux-2.6.18.orig/drivers/pci/quirks.c 2006-09-20 05:42:06.000000000 +0200 +++ linux-2.6.18/drivers/pci/quirks.c 2006-09-27 22:43:30.000000000 +0200 @@ -172,6 +172,7 @@ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8363_0, quirk_vialatency ); DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8371_1, quirk_vialatency ); DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8361, quirk_vialatency ); +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C691_0, quirk_vialatency );
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