RTEMS | cpukit/dev/can: fail controller init if worker task start doesn't start (!1240)

[Michal Lenc (@michallenc)]

Michal Lenc created a merge request: https://gitlab.rtems.org/rtems/rtos/rtems/-/merge_requests/1240

Project:Branches: michallenc/rtems:can-task-start-error to rtems/rtos/rtems:main
Author:   Michal Lenc



## Summary

CAN controllers need a running worker task to function. Check if
the task is actually started and return NULL (and free already allocated
resources) if it fails.

Also assert if cleanup functions fail.

This should fix coverity scan report.


## Generative AI

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