From 721960a449e26ef78114909b820e712ebf71a751 Mon Sep 17 00:00:00 2001
From: gm42 <gm42@users.noreply.github.com>
Date: Tue, 23 Jul 2019 14:05:22 +0200
Subject: [PATCH] Do not ignore errors on exclusive acquisition of the port

---
 serial_unix.go | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/serial_unix.go b/serial_unix.go
index 1cf690f..9576f35 100644
--- a/serial_unix.go
+++ b/serial_unix.go
@@ -30,7 +30,7 @@ type unixPort struct {
 
 func (port *unixPort) Close() error {
 	// Close port
-	port.releaseExclusiveAccess()
+	_ = port.releaseExclusiveAccess()
 	if err := unix.Close(port.handle); err != nil {
 		return err
 	}
@@ -182,7 +182,11 @@ func nativeOpen(portName string, mode *Mode) (*unixPort, error) {
 
 	unix.SetNonblock(h, false)
 
-	port.acquireExclusiveAccess()
+	err = port.acquireExclusiveAccess()
+	if err != nil {
+		port.Close()
+		return nil, err
+	}
 
 	// This pipe is used as a signal to cancel blocking Read
 	pipe := &unixutils.Pipe{}