Merge pull request #4 from davidko/master

Ignore termios.error when hot-unplugging USB-Serial devices

Author: zsquareplusc

serial_asyncio/__init__.py

@@ -16,6 +16,7 @@
 """
 import asyncio
 import serial
+import termios
 
 
 __version__ = '0.1'
@@ -345,7 +346,12 @@ def _call_connection_lost(self, exc):
         assert self._closing
         assert not self._has_writer
         assert not self._has_reader
-        self._serial.flush()
+        try:
+            self._serial.flush()
+        except termios.error:
+            # ignore termios errors which may happen if the serial device was
+            # hot-unplugged.
+            pass
         try:
             self._protocol.connection_lost(exc)
         finally: