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SubjectRe: ide.2.4.1-p3.01112001.patch
Date
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> I want to see the code to handle the apparent VIA DMA bug. At this point,
> preferably by just disabling DMA on VIA chipsets or something like that
> (if it has only gotten worse since 2.2.x, I'm not interested in seeing any
> experimental patches for it during early 2.4.x).

It hasnt gotten worse, its just its a very specific combination and its a
well known problem (vendors dont enable auto dma for ide for this reason)
2.2.16 just covers the cases I know about (and slightly overdoes it for now)

> We've already had one major fs corruption due to this, I want that fixed
> _first_.

I've got other reports too.

The PCI ids I kill autodma on for 2.2 to cover this are:

/*
* Don't try and tune a VIA 82C586 or 586A
*/
if (IDE_PCI_DEVID_EQ(devid, DEVID_VP_IDE))
{
autodma_default = 0;
break;
}
if (IDE_PCI_DEVID_EQ(devid, DEVID_VP_OLDIDE))
{
autodma_default = 0;
break;
}


PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_82C586_0
PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_82C586_1



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