From linux-usb-devel  Wed Feb 02 19:44:54 2005
From: Jesse Barnes <jbarnes () sgi ! com>
Date: Wed, 02 Feb 2005 19:44:54 +0000
To: linux-usb-devel
Subject: Re: [linux-usb-devel] EHCI & OHCI interrupt weirdness
Message-Id: <200502021144.54533.jbarnes () sgi ! com>
X-MARC-Message: https://marc.info/?l=linux-usb-devel&m=110737366029895

On Tuesday, January 18, 2005 5:39 pm, David Brownell wrote:
> On Tuesday 18 January 2005 3:30 pm, Jesse Barnes wrote:
> > Apparently it's USB 2.0 capable, but I can't seem to get that to work. 
> > In fact, if I allow the ehci_hcd driver to be loaded, regular USB 1.1
> > devices fail to work at all (I don't have a USB 2.0 device to test with
> > unfortunately).  I've attached the relevant parts of my system log.  It
> > looks like something bad is happening with the EHCI/OCHI interrupt
> > handling, since I see "IRQ 64 nobody cared" and /proc/interrupts
> > indicates that one of the interrupts (I guess one of the OHCI ports) is
> > triggering out of control:
> >
> >  64:  176477117          0          SN hub  ohci_hcd
> >  65:          0          0          SN hub  ehci_hcd, ohci_hcd
> >
> > Any ideas?
>
> Your BIOS doesn't like our kernel.  :(

That turned out to be the issue.  The PROM was allocating the interrupts 
incorrectly, so we were firing on a different line than the kernel expected.  
Oops. :)

Jesse


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