Fix inner callback decorators with partials (#102873)

homeassistant/core.py

@@ -209,6 +209,18 @@ def is_callback(func: Callable[..., Any]) -> bool:
     return getattr(func, "_hass_callback", False) is True
 
 
+def is_callback_check_partial(target: Callable[..., Any]) -> bool:
+    """Check if function is safe to be called in the event loop.
+
+    This version of is_callback will also check if the target is a partial
+    and walk the chain of partials to find the original function.
+    """
+    check_target = target
+    while isinstance(check_target, functools.partial):
+        check_target = check_target.func
+    return is_callback(check_target)
+
+
 class _Hass(threading.local):
     """Container which makes a HomeAssistant instance available to the event loop."""
 
@@ -1141,9 +1153,9 @@ class EventBus:
 
         This method must be run in the event loop.
         """
-        if event_filter is not None and not is_callback(event_filter):
+        if event_filter is not None and not is_callback_check_partial(event_filter):
             raise HomeAssistantError(f"Event filter {event_filter} is not a callback")
-        if run_immediately and not is_callback(listener):
+        if run_immediately and not is_callback_check_partial(listener):
             raise HomeAssistantError(f"Event listener {listener} is not a callback")
         return self._async_listen_filterable_job(
             event_type,