APPLIED[B, C]: [SRU][Cosmic][Disco][PATCH 0/1] s390/zcrypt: reinit ap queue state machine during device probe

[Khaled Elmously]

On 2018-12-14 11:32:05 , Joseph Salisbury wrote:
> BugLink: https://bugs.launchpad.net/bugs/1805414
> 
> == SRU Justification ==
> The vfio device driver when receiving an ap queue device does
>               additional resets thereby removing the registration for
>               interrupts for the ap device done by the ap bus core
>               code. So when later the vfio driver releases the device and
>               one of the default zcrypt drivers takes care of the device
>               the interrupt registration needs to get renewed. The current
>               code does no renew and result is that requests send into such
>               a queue will never see a reply processed - the application
>               hangs.
> 
> This commit has also been cc'd to upstream stable.
> 
> == Fix ==
> 104f708fd ("s390/zcrypt: reinit ap queue state machine during device probe")
> 
> == Regression Potential ==
> Low.  Limited to s390.
> 
> == Test Case ==
> A test kernel was built with this patch and tested by the original bug reporter.
> The bug reporter states the test kernel resolved the bug.
> 
> Harald Freudenberger (1):
>   s390/zcrypt: reinit ap queue state machine during device probe
> 
>  drivers/s390/crypto/ap_bus.c        |  8 ++++----
>  drivers/s390/crypto/ap_bus.h        |  1 +
>  drivers/s390/crypto/ap_queue.c      | 15 +++++++++++++++
>  drivers/s390/crypto/zcrypt_cex2a.c  |  1 -
>  drivers/s390/crypto/zcrypt_cex4.c   |  1 -
>  drivers/s390/crypto/zcrypt_pcixcc.c |  1 -
>  6 files changed, 20 insertions(+), 7 deletions(-)
> 
> -- 
> 2.7.4
> 
> 
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