I must suspend the search for this problem for a while. The specific
hardware (computer) is unavailable to me for about a week.


>  Could there be any reason why e.g. a pci_config_read_dword() call would
> > fail in Xenomai context (because when still in the module probe code, I
> > can perform the call correctly - in both cases I checked the
> > dev->bus->ops->read/write pointers and they are identical) ?
> >
> Today I moved the Xenomai ISR registration (rtdm_request_irq)) from the
> RTDM open method (rtdm_dev_open) to the module probe code (dev_probe). Then
> the registration works, but not always. Upon frequent insmod- and rmmodding,
> I still can make the machine freeze.
> I'm now more or less lost and open to any ideas..
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