From 399d3c9c2f241212ce9213c076b5426bd34a81af Mon Sep 17 00:00:00 2001
From: ExPl0siF <13750598+ExPl0siF@users.noreply.github.com>
Date: Thu, 24 Aug 2023 18:49:29 +0200
Subject: [PATCH] Added error management inside read function to get more
 appropriate exception (#529)

---
 .../com/hoho/android/usbserial/driver/CommonUsbSerialPort.java  | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/usbSerialForAndroid/src/main/java/com/hoho/android/usbserial/driver/CommonUsbSerialPort.java b/usbSerialForAndroid/src/main/java/com/hoho/android/usbserial/driver/CommonUsbSerialPort.java
index 578656c..b3c8f41 100644
--- a/usbSerialForAndroid/src/main/java/com/hoho/android/usbserial/driver/CommonUsbSerialPort.java
+++ b/usbSerialForAndroid/src/main/java/com/hoho/android/usbserial/driver/CommonUsbSerialPort.java
@@ -170,7 +170,7 @@ public abstract class CommonUsbSerialPort implements UsbSerialPort {
     }
 
     protected int read(final byte[] dest, final int timeout, boolean testConnection) throws IOException {
-        if(mConnection == null) {
+        if(mConnection == null || mUsbRequest == null) {
             throw new IOException("Connection closed");
         }
         if(dest.length <= 0) {