Fix Non-thread-safe operation in rflink binary_sensor (#62286)

homeassistant/components/rflink/binary_sensor.py

@@ -12,6 +12,7 @@ from homeassistant.const import (
     CONF_FORCE_UPDATE,
     CONF_NAME,
 )
+from homeassistant.core import callback
 import homeassistant.helpers.config_validation as cv
 import homeassistant.helpers.event as evt
 
@@ -81,6 +82,7 @@ class RflinkBinarySensor(RflinkDevice, BinarySensorEntity):
 
         if self._state and self._off_delay is not None:
 
+            @callback
             def off_delay_listener(now):
                 """Switch device off after a delay."""
                 self._delay_listener = None