Only detatch usb listeners if we have a usb controller

tessel · Oct 26, 2015 · 706bb9a · 706bb9a
1 parent bc9c59f
commit 706bb9a
Showing 1 changed file with 4 additions and 2 deletions.
diff --git a/lib/usb_connection.js b/lib/usb_connection.js
@@ -320,7 +320,7 @@ util.inherits(USB.Scanner, EventEmitter);
 
 USB.Scanner.prototype.start = function() {
   var self = this;
-  if (usb) {
+  if (haveusb) {
     usb.getDeviceList().forEach(deviceInspector);
 
     usb.on('attach', deviceInspector);
@@ -336,7 +336,9 @@ USB.Scanner.prototype.start = function() {
 };
 
 USB.Scanner.prototype.stop = function() {
-  usb.removeAllListeners('attach');
+  if (haveusb) {
+    usb.removeAllListeners('attach');
+  }
 };
 
 module.exports.startScan = startScan;