Enables unsolicited status.
- macOS 10.0+
- Mac Catalyst 13.0+
Pointer to IOFireWireSBP2LibLoginInterface object.
Returns kIOReturnSuccess if the status enable write started successfully.
After unsolicited is sent the device will not send any additional unsolicited status until a specific register is written. This serves as a sort of flow-control for unsolicited status. After unsolicited status is recieved and processed drivers will want to reenable the delivery of unsolicted status by a call to this method.