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SubjectRe: [RFC/CFT] cmd640 irqlocking fixes
Vojtech Pavlik wrote:

>
> The kernel functions are OK. The problem is that the kernel can use
> PCIBIOS calls to set the registers. And certain old buggy BIOSes which
> violate the PCI spec can use wrong size data transfers to set the
> registers, which the CMD640 doesn't like.
>
> IMHO the best workaround here would be either to disable PCIBIOS calls
> and revert to conf1 or conf2 in the PCI code if a CMD640 is present, or
> just panic() in the CMD640 code and suggest to the user to use
> "pci=nobios" on the kernel command line. I'd actually prefer the later.
>

From a long long time ago during the first days of this driver I
remember that those chips could be wired to both PCI and VLB(ISA) bus.
And this is the main reaons why the functions is question exist in first
place -> "emulating" PCI configuration space access on VLB.


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