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List: linux-usb-devel
Subject: Re: [linux-usb-devel] EHCI & OHCI interrupt weirdness
From: Jesse Barnes <jbarnes () sgi ! com>
Date: 2005-02-02 19:44:54
Message-ID: 200502021144.54533.jbarnes () sgi ! com
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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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