APPLIED[B, C]: [SRU][Cosmic][Disco][PATCH 0/1] s390/zcrypt: reinit ap queue state machine during device probe
Khaled Elmously
khalid.elmously at canonical.com
Thu Dec 20 07:42:48 UTC 2018
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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