From e8aa6ab7354ee438067c605b72907d9bf69df3fb Mon Sep 17 00:00:00 2001
From: Scott Lahteine <github@thinkyhead.com>
Date: Tue, 12 Jan 2021 22:32:12 -0600
Subject: [PATCH] Ignore M22 during SD print

---
 Marlin/src/gcode/sd/M21_M22.cpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/Marlin/src/gcode/sd/M21_M22.cpp b/Marlin/src/gcode/sd/M21_M22.cpp
index 77df751fc7..a618bc0be3 100644
--- a/Marlin/src/gcode/sd/M21_M22.cpp
+++ b/Marlin/src/gcode/sd/M21_M22.cpp
@@ -35,6 +35,10 @@ void GcodeSuite::M21() { card.mount(); }
 /**
  * M22: Release SD Card
  */
-void GcodeSuite::M22() { card.release(); }
+void GcodeSuite::M22() {
+
+  if (!IS_SD_PRINTING()) card.release();
+
+}
 
 #endif // SDSUPPORT