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

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Message-ID: <f528148d-0074-8173-09fc-c1b50bbabe75@linux.ibm.com>
Date:   Wed, 14 Dec 2022 10:16:34 -0500
From:   "Jason J. Herne" <jjherne@...ux.ibm.com>
To:     Tony Krowiak <akrowiak@...ux.ibm.com>, linux-s390@...r.kernel.org,
        linux-kernel@...r.kernel.org, kvm@...r.kernel.org
Cc:     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: Re: [PATCH 0/7] improve AP queue reset processing


On 12/13/22 10:44 AM, Tony Krowiak wrote:
> 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(-)


This series largely matches what I've already reviewed. I like the way 
you broke this up, it does a better job telling the story.

Here's my R-b for the entire series.
Reviewed-by: Jason J. Herne <jjherne@...ux.ibm.com>