Method and apparatus for downgrading firmware in a controller

摘要

A method for downgrading firmware in a controller is provided. The method includes receiving a request, by the controller, to downgrade the firmware from a current version to an older version. For a feature implemented in the current version and not implemented in the older version, the method includes determining if the feature is currently in-use by the controller. If the feature is currently in-use by the controller, the method includes warning a user and abandoning the request. If the feature is not currently in-use by the controller, the method includes checking other features implemented in the current version and not implemented in the older version, and repeating determining, providing, abandoning, and checking, and downgrading the firmware, if all of the features implemented in the current version and not implemented in the older version are not currently in-use by the controller.

主权项

1. A method for downgrading firmware in a controller, comprising:
receiving a request, by the controller, to downgrade the firmware from a current version to an older version; for a feature implemented in the current version and not implemented in the older version:
determining if the feature is currently in-use by the controller;
if the feature is currently in-use by the controller:
providing a warning of feature incompatibility between the current version and the older version to a user; andabandoning the request;if the feature is not currently in-use by the controller:
checking other features implemented in the current version and not implemented in the older version and repeating determining, providing, abandoning, and checking; anddowngrading the firmware, if all of the features implemented in the current version and not implemented in the older version are not currently in-use by the controller,wherein downgrading the firmware comprises executing, by the controller, the older version of firmware.