As Gorka said, we generally don't require spec for driver features but we encourage to register a blueprint on launchpad[1] so as to keep track of all the features. Having said that, the spec would act as a good point of documentation so we can consider it merging. It's a good point for discussion which i will add it in the cinder meeting agenda today[2] but even if it doesn't merge this cycle (since we're already in the spec freeze exception phase), we can do it next cycle without blocking reviews of the main feature.

[1] https://blueprints.launchpad.net/cinder

[2] https://etherpad.opendev.org/p/cinder-zed-meetings

Thanks and regards

Rajat Dhasmana