[Pkg-xen-devel] Bug#748052: [Xen-devel] dom0 USB failing with "ehci-pci: probe of 0000:00:1d.0 failed with error -110"

[Jan Beulich]

>>> On 16.05.14 at 17:31, <ijc at hellion.org.uk> wrote:
> On Fri, 2014-05-16 at 11:08 +0100, Jan Beulich wrote:
>> And finally, looking at the IRQ usage, this
>> 
>> [    2.087722] xen: registering gsi 22 triggering 0 polarity 1
>> [    2.087731] xen: --> pirq=22 -> irq=22 (gsi=22)
>> [    2.100161] xen: registering gsi 20 triggering 0 polarity 1
>> [    2.100166] xen: --> pirq=20 -> irq=20 (gsi=20)
>> 
>> happens rather early - it's not clear to me in which context that is.
>> And there's no problem with GSI 22 used by the other EHCI HC, so
>> a fundamental question is what other device(s) is/are using GSI 20
>> (not visible from the non-Xen kernel log).
> 
> Would this be visible in /proc/interrupts when not running under Xen?

Possibly, but not necessarily (the fact that these messages show up
so early, without any connection to a driver being loaded, kind of
puzzle me - I wonder whether they're associated with one of the PCI
bridges, which lspci may be able to tell us).

Jan