node-red-gpio: Add patch to perform explicit node cleanup

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>

recipes-app/node-red-gpio/files/0003-Clean-up-mraa-objects-on-node-closing.patch

@@ -0,0 +1,83 @@
+From 110eec7a5a7452e8df14b67de4188dc8ea8eefd0 Mon Sep 17 00:00:00 2001
+From: Jan Kiszka <jan.kiszka@siemens.com>
+Date: Fri, 27 Nov 2020 08:14:14 +0100
+Subject: [PATCH 3/3] Clean up mraa objects on node closing
+
+Required as nodejs will only lazily delete the node objects, and we may
+race with the next user requesting the resources.
+
+Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
+---
+ hardware/intel/mraa-gpio-ain.js  | 1 +
+ hardware/intel/mraa-gpio-din.js  | 1 +
+ hardware/intel/mraa-gpio-dout.js | 1 +
+ hardware/intel/mraa-gpio-led.js  | 4 ++++
+ hardware/intel/mraa-gpio-pwm.js  | 1 +
+ 5 files changed, 8 insertions(+)
+
+diff --git a/hardware/intel/mraa-gpio-ain.js b/hardware/intel/mraa-gpio-ain.js
+index 65df93b..91e2b0b 100644
+--- a/hardware/intel/mraa-gpio-ain.js
++++ b/hardware/intel/mraa-gpio-ain.js
+@@ -22,6 +22,7 @@ module.exports = function(RED) {
+
+         this.on('close', function() {
+             clearInterval(this.timer);
++            node.x.close();
+         });
+     }
+     RED.nodes.registerType("mraa-gpio-ain", gpioAin);
+diff --git a/hardware/intel/mraa-gpio-din.js b/hardware/intel/mraa-gpio-din.js
+index 4ac983f..7eca35a 100644
+--- a/hardware/intel/mraa-gpio-din.js
++++ b/hardware/intel/mraa-gpio-din.js
+@@ -51,6 +51,7 @@ module.exports = function(RED) {
+         this.on('close', function() {
+             node.x.isr(m.EDGE_BOTH, null);
+             node.x.isrExit();
++            node.x.close();
+         });
+     }
+     RED.nodes.registerType("mraa-gpio-din", gpioDin);
+diff --git a/hardware/intel/mraa-gpio-dout.js b/hardware/intel/mraa-gpio-dout.js
+index 37d1429..fb3dbd8 100644
+--- a/hardware/intel/mraa-gpio-dout.js
++++ b/hardware/intel/mraa-gpio-dout.js
+@@ -24,6 +24,7 @@ module.exports = function(RED) {
+         });
+
+         this.on('close', function() {
++            node.p.close();
+         });
+     }
+     RED.nodes.registerType("mraa-gpio-dout", gpioDout);
+diff --git a/hardware/intel/mraa-gpio-led.js b/hardware/intel/mraa-gpio-led.js
+index aa613e9..5803296 100644
+--- a/hardware/intel/mraa-gpio-led.js
++++ b/hardware/intel/mraa-gpio-led.js
+@@ -64,6 +64,10 @@ module.exports = function(RED) {
+             }
+         });
+         this.on('close', function() {
++            this.led0.close();
++            this.led1.close();
++            this.led2.close();
++            this.led3.close();
+         });
+     }
+     RED.nodes.registerType("mraa-gpio-led", LEDNode);
+diff --git a/hardware/intel/mraa-gpio-pwm.js b/hardware/intel/mraa-gpio-pwm.js
+index 22b02cb..6a2469f 100644
+--- a/hardware/intel/mraa-gpio-pwm.js
++++ b/hardware/intel/mraa-gpio-pwm.js
+@@ -21,6 +21,7 @@ module.exports = function(RED) {
+
+         this.on('close', function() {
+             node.p.enable(false);
++            node.p.close();
+         });
+     }
+     RED.nodes.registerType("mraa-gpio-pwm", gpioPWM);
+-- 
+2.26.2
+

recipes-app/node-red-gpio/node-red-gpio_0.0.6-IOT2050.bb

@@ -17,7 +17,8 @@ MAINTAINER = "chao.zeng@siemens.com"
 SRC_URI = " \
     git://github.com/node-red/node-red-nodes;protocol=https \
     file://0001-add-the-board-info-add-the-led-control-node.patch \
-    file://0002-extend-gpio-to-D19.patch"
+    file://0002-extend-gpio-to-D19.patch \
+    file://0003-Clean-up-mraa-objects-on-node-closing.patch"
 SRCREV="3087e8e2a1ea189f394bca0a2af159ad859d7722"
 
 S = "${WORKDIR}/git"