Swapping Software Without Stopping
The state transitions and ownership rules behind replacing a driver package.
Replacement is a relationship change
A package replacement is not just a file copy. The host environment associates a package with a device identity, creates or updates services and interfaces, and records the state needed to represent the device.
Ownership must be explicit
Open handles, queued requests, mapped memory, and power references all belong to a lifecycle. A well-defined transition accounts for those resources before one software layer stops representing the device and another takes its place.
The device can outlive the package
The physical device and its firmware remain present while the host-side representation changes. This distinction helps explain why package identity, device state, and hardware identity appear as separate concepts in platform documentation.
A reference describes phases
The useful vocabulary is prepare, quiesce, detach, associate, start, and expose—used as lifecycle concepts rather than a user walkthrough. Each phase has a boundary and an owner, and not every transition is available for every device class.
Reference facts
- Replacement unit
- A package-to-device association and lifecycle transition.
- Protected resources
- Handles, queues, memory mappings, and power references require ownership.
Questions and answers
Does replacing a package replace the device?
No. It changes the host-side software representation while the physical device and its firmware remain separate layers.
Why can replacement require a transition state?
Outstanding requests and resource ownership must have a defined relationship to the outgoing and incoming software layers.