Messages in this thread |  | | Date | Wed, 6 Dec 2000 11:38:30 -0800 (PST) | From | Linus Torvalds <> | Subject | Re: test12-pre6 |
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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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