In the meantime, I've located the rthal_irq_disable() and used it instead of the RTDM return value (which is now 0).

The machine still hangs.

More importantly, I noticed that the second (after the first) interrupt gets lost (as is to be expected when the interrupt remains disabled). This causes the RTDM driver to timeout and the Xenomai program using the RTDM driver is actually able to gracefully shut down. It seems that, upon exiting, the machine hangs.

I'll now try two new tests:

1. Turn off the cards's interrupts after the first IRQ has arrived.
2. Keep my program alive for a few secs using task_sleep() or so to see if cleanup code is going awry.

Any other tests ?


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