doc: clarify locking and async of OPAL_SENSOR_READ
Reported-by: Robert Lippert
@@ -11,6 +11,9 @@ service processor for example. In this case, the call will return
OPAL_ASYNC_COMPLETION and the token parameter will be used to wait for
the completion of the request.
+The OPAL API doesn't enforce alimit on the number of sensor calls that can
+be in flight.
+
Parameters
----------
@@ -32,7 +35,9 @@ OPAL_PARAMETER
OPAL_UNSUPPORTED
platform does not support reading sensors.
-In case of communication with the FSP on IBM systems:
+Some sensors may have to be read asynchronously (e.g. because OPAL must
+communicate with a service processor). One example is sensors provided
+by the FSP on IBM FSP systems.
OPAL_ASYNC_COMPLETION
a request was sent and an async completion will
