From 761c68e469bb2bc4734d8e2b44147e8640d14434 Mon Sep 17 00:00:00 2001
From: Grigori Goronzy <greg@chown.ath.cx>
Date: Sat, 9 Jan 2021 16:50:08 +0100
Subject: [PATCH] frontend: fix disconnect when autodetection fails

We don't know the protocol version so we can't actually disconnect,
just skip it.
---
 stcgal/frontend.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/stcgal/frontend.py b/stcgal/frontend.py
index 627ead2..31a0978 100644
--- a/stcgal/frontend.py
+++ b/stcgal/frontend.py
@@ -181,7 +181,8 @@ class StcGal:
         except (StcFramingException, StcProtocolException) as ex:
             sys.stdout.flush()
             print("Protocol error: %s" % ex, file=sys.stderr)
-            self.protocol.disconnect()
+            if not isinstance(self.protocol, StcAutoProtocol):
+                self.protocol.disconnect()
             return 1
         except serial.SerialException as ex:
             sys.stdout.flush()