Re: Need help for hardware bug in Intel's EHCI implementation

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On Wed, 12 Dec 2012, Alan Stern wrote:

> > Nehalem seems to be a particular CPU from 2008.  ICH9 came out in 2007.
> > So I guess your hardware is a year older than what the devs are looking
> > for.  I would suggest you test on the newer box anyway.
> 
> I just finished the test.  The ICH9 system exhibits the same sort of 
> bug.

Incidentally, I tried running the same test with an NEC EHCI 
controller:

$ lspci -v -s 1:1.2
01:01.2 USB Controller: NEC Corporation USB 2.0 (rev 04) (prog-if 20 [EHCI])
        Subsystem: HaSoTec GmbH Device 2928
        Flags: bus master, medium devsel, latency 32, IRQ 9
        Memory at fe5dfc00 (32-bit, non-prefetchable) [size=256]
        Capabilities: <access denied>
        Kernel driver in use: ehci_hcd

$ lspci -vn -s 1:1.2
01:01.2 0c03: 1033:00e0 (rev 04) (prog-if 20 [EHCI])
        Subsystem: 0e55:2928
        Flags: bus master, medium devsel, latency 32, IRQ 9
        Memory at fe5dfc00 (32-bit, non-prefetchable) [size=256]
        Capabilities: <access denied>
        Kernel driver in use: ehci_hcd

It passed with no errors, unlike the Intel controllers.

Alan Stern

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