Description of problem: The ATIIXP chipsets with ID 1002:4379 and 1002:4376 are unsupported by the kernel. This causes PIO mode operation with horrible performance and triggers bug #142713. At least for the :4379 one, DMA seems to work without problems when doing | static struct pci_device_id atiixp_pci_tbl[] = { | { PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP_IDE, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, |+ { PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP_IDE+0x30, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, | { 0, }, | }; in drivers/ide/pci/atiixp.c and inserting it as a separate module. I could not test the :4376 one because I am unable to build the complete kernel (build-failures on AMD64). Version-Release number of selected component (if applicable): kernel-2.6.9-1.681_FC3 (both i686 and x86_64) How reproducible: 100%
Sounds a bit like bug #142647 (although that is a different vendor id?)
Bug #142647 seems to be fixed upstream already. But 1002:437[69] are still unsupported.
a trivial patch for 1002:4379 can be found at http://marc.theaimsgroup.com/?l=linux-ide&m=110357606225070&w=2 this adds support for 1002:4376 also, but I see data-corruption on CD-ROM drives. It will need further tests...
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