System and method for recovery of sideband interfaces for controllers

A method for managing a plurality of managed devices via a sideband bus, the method comprising:

• configuring, by a remote access controller, a first timer for a first managed device of the plurality of managed devices, wherein the first timer is configured to expire after a first duration;
• transmit a timer command from the remote access controller to the first managed device via the sideband bus, wherein the timer command specifies the first timer configuration;
• transmit temperature requests to the first managed device via the sideband bus at periodic intervals;
• starting, by a sideband bus monitor of the first managed device, the first timer for the first duration based on receipt of the timer command from the remote access controller;
• monitoring the sideband bus for the temperature requests communications from the remote access controller;
• restarting the first timer and reporting collected temperature sensor readings to the remote access controller, if a temperature request from the remote access controller is detected prior to the expiration of the first duration, and
• reset the sideband bus without restarting the first managed device, if no temperature request from the remote access controller is detected prior to the expiration of the first duration;
• detecting that the remote access controller does not receive the temperature sensor readings before beginning a next periodic interval;
• and
• responsive to the detecting, determining, by the remote access controller, a second duration until reset of the sideband bus by the first managed device.

An Information Handling System (IHS) comprising:

• a remote access controller configured to:
• configure, for a first managed device, a first timer to expire after a first duration;
• transmit a timer command to the first managed device via a sideband bus, wherein the timer command specifies the first timer configuration;
• transmit temperature requests to the first managed device via the sideband bus at periodic intervals;
• the first managed device coupled to the remote access controller via the sideband bus, wherein the first managed device comprises a sideband bus monitor configured to:
• start a first timer for the first duration based on receipt of the timer command from the remote access controller;
• monitor the sideband bus for the temperature requests from the remote access controller;
• if a temperature request from the remote access controller is detected prior to the expiration of the first duration, restart the first timer and report collected temperature sensor readings to the remote access controller;
• and
• if no temperature request from the remote access controller is detected prior to the expiration of the first duration, reset the sideband bus without restarting the IHS, and
• wherein the remote access controller is further configured to determine a second duration until the first managed device resets the sideband bus, if the remote access controller does not receive the temperature sensor readings before beginning a next periodic interval.