Re: Testing for hardware bug in EHCI controllers

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On Sat, 2 Mar 2013, Bjørn Mork wrote:

> Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> writes:
> 
> > A while ago I wrote about a hardware bug in my Intel ICH5 and ICH8 EHCI
> > controllers.  You pointed out that these are rather old components, not 
> > being used in current systems, which is quite true.
> 
> Just tested on my (almost as old) laptop with Intel ICH9 EHCI
> controllers (GM45 chipset):
> 
>  bjorn@nemi:/tmp$ lspci -nns 00:1d.7
>  00:1d.7 USB controller [0c03]: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #1 [8086:293a] (rev 03)
> 
> and it was a "success":
> 
> [59091.240771] driver: '4-1:1.0': driver_bound: bound to device 'usbfs'
> [59091.339847] ehci-pci 0000:00:1d.7: EHCI hardware bug detected: 82008d80 00008d00
> [59091.470486] ehci-pci 0000:00:1d.7: EHCI hardware bug detected: 82008d80 00008d00
...

> So I guess this bug is common, at least in older Intel chipsets.

Yes.  Not too surprising, I guess.  Sarah mentioned that the EHCI cores 
were redesigned for the next generation of chipsets after ICH*.  Maybe 
the bug was fixed then.

Alan Stern

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