From 2d749d490baba907499cdf83a8222a26354b78ce Mon Sep 17 00:00:00 2001
From: Bob-the-Kuhn <bob.kuhn@att.net>
Date: Fri, 16 Feb 2018 02:18:50 -0600
Subject: [PATCH] Fix / complete USE_CONTROLLER_FAN (#9666)

---
 Marlin/src/Marlin.h                  | 4 ++++
 Marlin/src/feature/controllerfan.cpp | 3 +++
 Marlin/src/feature/power.cpp         | 2 +-
 3 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/Marlin/src/Marlin.h b/Marlin/src/Marlin.h
index b8e4ea150..bf56c79d8 100644
--- a/Marlin/src/Marlin.h
+++ b/Marlin/src/Marlin.h
@@ -208,6 +208,10 @@ extern millis_t max_inactive_time, stepper_inactive_time;
   #endif
 #endif
 
+#if ENABLED(USE_CONTROLLER_FAN)
+  extern uint8_t controllerFanSpeed;
+#endif
+
 #if ENABLED(PID_EXTRUSION_SCALING)
   extern int lpq_len;
 #endif
diff --git a/Marlin/src/feature/controllerfan.cpp b/Marlin/src/feature/controllerfan.cpp
index 916c9b746..6a770b660 100644
--- a/Marlin/src/feature/controllerfan.cpp
+++ b/Marlin/src/feature/controllerfan.cpp
@@ -27,6 +27,8 @@
 #include "../module/stepper_indirection.h"
 #include "../module/temperature.h"
 
+uint8_t controllerFanSpeed;
+
 void controllerfan_update() {
   static millis_t lastMotorOn = 0, // Last time a motor was turned on
                   nextMotorCheck = 0; // Last time the state was checked
@@ -56,6 +58,7 @@ void controllerfan_update() {
 
     // Fan off if no steppers have been enabled for CONTROLLERFAN_SECS seconds
     uint8_t speed = (!lastMotorOn || ELAPSED(ms, lastMotorOn + (CONTROLLERFAN_SECS) * 1000UL)) ? 0 : CONTROLLERFAN_SPEED;
+    controllerFanSpeed = speed;
 
     // allows digital or PWM fan output to be used (see M42 handling)
     WRITE(CONTROLLER_FAN_PIN, speed);
diff --git a/Marlin/src/feature/power.cpp b/Marlin/src/feature/power.cpp
index c72d7100e..d4bda257f 100644
--- a/Marlin/src/feature/power.cpp
+++ b/Marlin/src/feature/power.cpp
@@ -46,7 +46,7 @@ bool Power::is_power_needed() {
     HOTEND_LOOP() if (thermalManager.autofan_speed[e] > 0) return true;
   #endif
 
-  #if ENABLED(AUTO_POWER_CONTROLLERFAN) && HAS_CONTROLLER_FAN
+  #if ENABLED(AUTO_POWER_CONTROLLERFAN) && HAS_CONTROLLER_FAN && ENABLED(USE_CONTROLLER_FAN)
     if (controllerFanSpeed > 0) return true;
   #endif