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Subject: [OASIS Issue Tracker] Commented: (VIRTIO-42) ccw: Provide a revision mechanism.

    [ http://tools.oasis-open.org/issues/browse/VIRTIO-42?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=35181#action_35181 ] 

Michael Tsirkin commented on VIRTIO-42:

So I think this SET_REVISION command isn't necessary anymore since we have the
transport independent FEATURES_OK command.
After this command, non-transitional devices can check VIRTIO_F_VERSION_1
to detect legacy drivers.

If you agree please close this issue.

> ccw: Provide a revision mechanism.
> ----------------------------------
>                 Key: VIRTIO-42
>                 URL: http://tools.oasis-open.org/issues/browse/VIRTIO-42
>             Project: OASIS Virtual I/O Device (VIRTIO) TC
>          Issue Type: Improvement
>            Reporter: Cornelia Huck
> Allow drivers to select a revision they want to operate a device at, and allow devices to only support a subset of revisions.
> This allows non-transtional devices to reject operation by legacy drivers (see https://tools.oasis-open.org/issues/browse/VIRTIO-34).

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