From 033fc34aff6130b8088badd70979b335aca428ac Mon Sep 17 00:00:00 2001
From: dxl <64101226@qq.com>
Date: Tue, 21 Jul 2020 12:48:23 +0800
Subject: [PATCH] some chinese comments removed

---
 .../src/main/java/cn/proxgrind/com/AbsUsbBulkTransfer.java    | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/communication/src/main/java/cn/proxgrind/com/AbsUsbBulkTransfer.java b/communication/src/main/java/cn/proxgrind/com/AbsUsbBulkTransfer.java
index 6e2fa9c2..d18ad13d 100644
--- a/communication/src/main/java/cn/proxgrind/com/AbsUsbBulkTransfer.java
+++ b/communication/src/main/java/cn/proxgrind/com/AbsUsbBulkTransfer.java
@@ -213,7 +213,9 @@ public abstract class AbsUsbBulkTransfer implements DriverInterface<String, UsbM
 
     @Override
     public void disconect() {
-        mCon.releaseInterface(mUi);
+        if (mCon != null && mUi != null) {
+            mCon.releaseInterface(mUi);
+        }
     }
 
     @Override