[OASIS Issue Tracker] Commented: (VIRTIO-30) extend initialization sequence

[ http://tools.oasis-open.org/issues/browse/VIRTIO-30?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=35074#action_35074 ] 

Rusty Russell commented on VIRTIO-30:
-------------------------------------

OK, rework appears here:
https://lists.oasis-open.org/archives/virtio/201310/msg00014.html

It adds FEATURES_OK, and requires driver to set DEVICE_OK before any use.

> extend initialization sequence
> ------------------------------
>
>                 Key: VIRTIO-30
>                 URL: http://tools.oasis-open.org/issues/browse/VIRTIO-30
>             Project: OASIS Virtual I/O Device (VIRTIO) TC
>          Issue Type: New Feature
>         Environment: guest driver
>            Reporter: Michael Tsirkin
>            Assignee: Michael Tsirkin
>
> in the past we sometimes wanted an ability to make driver gracefully fail early in initialization
> if it does not recognize/support a feature.
> One such example we are introducing right now is the new VERSION_1 feature.
> Drivers need to be able to add buffers before initialization is complete.
> We also need a "lock point" after which drivers do not change features.

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