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SubjectRe: test12-pre6


On Wed, 6 Dec 2000, Erik Mouw wrote:
> >
> > Can you tell me what device it is that doesn't work for you?
>
> The USB controller. That's device 00:07.2:
>
> 00:07.2 USB Controller: Intel Corporation 82440MX USB Universal Host Controller (prog-if 00 [UHCI])
> Control: I/O+ Mem- BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
> Status: Cap- 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
> Interrupt: pin D routed to IRQ 11
> Region 4: I/O ports at fcc0 [size=32]

Now, this is with a bog-standard PIIX irq router, so we definitely know
that we have the pirq table parsing right. I even have unofficial
confirmation from intel engineers on this.

But I see something obviously wrong there: you have busmaster disabled.

Looking into the UHCI controller code, I notice that neither UHCI driver
actually does the (required)

pci_set_master(dev);

Please add that to just after a successful "pci_enable_device(dev)", and I
just bet your USB will start working.

Johannes, Georg, the above is a fairly embarrassing bug, and is likely to
explain a _lot_ of USB failures (the OHCI driver does do this, btw).

Linus

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