[SRU][Bionic][Patch 0/1] Fixes for qdio: clear intparm during shutdown problem on s390x (LP: 1828394)

[frank.heimes at canonical.com]

Buglink: https://bugs.launchpad.net/bugs/1828394

SRU Justification:

[Impact]

* Crash in qeth_irq() with "Unable to handle kernel pointer dereference in virtual kernel address space"

[Fix]

* 89286320a236d245834075fa13adb0bdd827ecaa 8928632 "s390/qdio: clear intparm during shutdown"

[Test Case]

* Offline an OSA CHPID with multiple active qeth interfaces.

[Regression Potential] 

* The regression potential can be considered as very low since it only affects the s390x platform

* and there it only affects the (ccW) qeth (OSA) network devices

* and again this happens if the CHPID is offlined, which usually doesn't happen during regular operation.

[Other Info]

* It is al* The patch was upstream accepted with kernel 4.17, hence it's already part of cosmic, disco and eoan and proven there to work.

* It needs to be applied to kernel 4.15 to land in 18.04 GA and 16.04.5 HWE.

Julian Wiedmann (1):
  From: Julian Wiedmann <jwi at linux.vnet.ibm.com>

 drivers/s390/cio/qdio_main.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

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2.7.4