[Xenomai] RT serial cross-link failure

[Michael Welling <mwelling@ieee.org>]

I took the time to update the IMX UART driver such that it registers with the 3.18 kernel.

The driver appears to register correctly and the /dev/rtdm/rtser* nodes appear.

When I run the cross-link demo the system hangs after an error in read_task.

Here is the output that I get:
main : write-file opened
main : write-config written
main : read-file opened
main : read-config written
main : write-task created
main : read-task created
main : starting write-task
main : strating read-task
 Nr |   write-irq    |    irq->read    |   write->read   |
----------------------------------------------------------
read_task: error on RTSER_RTIOC_WAIT_EVENT, Operation no permitted
main : /dev/rtdm/rtser1 (read) -> closed
read_task: exit

Any ideas why this would happen?

I can provide the patch for the driver if necessary. I tried to keep the changes to a minimal.