[VIRTIO-116] ccw transport needs to allow failing WRITE_STATUS - OASIS Technical Committees Issue Tracker

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Type: Bug
Status: Resolved
Priority: Major
Resolution: Fixed
Affects Version/s: virtio 1.0 csprd01, virtio 1.0 csprd02, virtio 1.0 csprd03, virtio 1.0 cs01
Fix Version/s: virtio 1.0 cs03
Labels:
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Environment:

Cornelia Huck <cornelia.huck@de.ibm.com>

Proposal:
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Failure scenarios for driver and device need to be documented:

driver must check for failures of WRITE_STATUS and treat device as unusable

device must post failure of WRITE_STATUS if the driver tries to set a wrong state

Proposed patch: (updated)
https://lists.oasis-open.org/archives/virtio/201502/msg00014.html

Old proposal (listed here for completenes, please ignore for voting purposes):
https://lists.oasis-open.org/archives/virtio/201410/msg00031.html
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Failure scenarios for driver and device need to be documented: driver must check for failures of WRITE_STATUS and treat device as unusable device must post failure of WRITE_STATUS if the driver tries to set a wrong state Proposed patch: (updated) https://lists.oasis-open.org/archives/virtio/201502/msg00014.html Old proposal (listed here for completenes, please ignore for voting purposes): https://lists.oasis-open.org/archives/virtio/201410/msg00031.html

The WRITE_STATUS ccw command needs to be able to fail, e.g. when the driver wants to set FEATURES_OK but the device can't work with the features.