linux-kernel - [PATCH 0/7] improve AP queue reset processing

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Date:   Tue, 13 Dec 2022 10:44:30 -0500
From:   Tony Krowiak <akrowiak@...ux.ibm.com>
To:     linux-s390@...r.kernel.org, linux-kernel@...r.kernel.org,
        kvm@...r.kernel.org
Cc:     jjherne@...ux.ibm.com, freude@...ux.ibm.com,
        borntraeger@...ibm.com, cohuck@...hat.com, mjrosato@...ux.ibm.com,
        pasic@...ux.ibm.com, alex.williamson@...hat.com,
        kwankhede@...dia.com, fiuczy@...ux.ibm.com
Subject: [PATCH 0/7] improve AP queue reset processing

This series introduces several improvements to the function that performs
AP queue resets:

* Breaks up reset processing into multiple smaller, more concise functions.

* Use TAPQ to verify completion of a reset in progress rather than mulitple
  invocations of ZAPQ.

* Check TAPQ response codes when verifying successful completion of ZAPQ.

* Fix erroneous handling of some error response codes.

* Increase the maximum amount of time to wait for successful completion of
  ZAPQ.

* Always clean up IRQ resources when the ZAPQ response code indicates an
  error.

* Consider reset complete when ZAPQ response code indicates the adapter to
  which a queue is connected is deconfigured. All queues associated with an
  adapter are reset when it is deconfigured. 

Tony Krowiak (7):
  s390/vfio-ap: verify reset complete in separate function
  s390/vfio_ap: check TAPQ response code when waiting for queue reset
  s390/vfio_ap: use TAPQ to verify reset in progress completes
  s390/vfio_ap: verify ZAPQ completion after return of response code
    zero
  s390/vfio_ap: fix handling of error response codes
  s390/vfio_ap: increase max wait time for reset verification
  s390/vfio_ap: always clean up IRQ resources

 drivers/s390/crypto/vfio_ap_ops.c | 106 ++++++++++++++++++++----------
 1 file changed, 73 insertions(+), 33 deletions(-)

-- 
2.31.1