blk_cloned_rq_check_limits — Helper function to check a cloned request for new the queue limits
|struct request_queue * q,|
|struct request * rq|
rq may have been made based on weaker limitations of upper-level queues
in request stacking drivers, and it may violate the limitation of
Since the block layer and the underlying device driver trust
after it is inserted to
q, it should be checked against
the insertion using this generic function.
Request stacking drivers like request-based dm may change the queue limits when retrying requests on other queues. Those requests need to be checked against the new queue limits again during dispatch.