[SRU][Cosmic][Disco][PATCH 0/1] s390/zcrypt: reinit ap queue state machine during device probe
joseph.salisbury at canonical.com
Fri Dec 14 16:32:05 UTC 2018
== 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
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(-)
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