From 31aac6265cde63c357a81ceb0ff3f8e9236d3153 Mon Sep 17 00:00:00 2001
From: nia <29542929+alarixnia@users.noreply.github.com>
Date: Sat, 29 Jan 2022 05:59:48 +0000
Subject: [PATCH] midioss: Use unbuffered I/O to access the device node.
 (#6276)

This fixes problems reading from MIDI devices on NetBSD - the
input blocked until a certain number of notes have been read
rather than returning immediately when a single note is received.
---
 src/core/midi/MidiOss.cpp | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/core/midi/MidiOss.cpp b/src/core/midi/MidiOss.cpp
index 77f324442..dddcfa12e 100644
--- a/src/core/midi/MidiOss.cpp
+++ b/src/core/midi/MidiOss.cpp
@@ -39,8 +39,10 @@ MidiOss::MidiOss() :
 {
 	// only start thread, if opening of MIDI-device is successful,
 	// otherwise isRunning()==false indicates error
-	if( m_midiDev.open( QIODevice::ReadWrite ) ||
-					m_midiDev.open( QIODevice::ReadOnly ) )
+	if( m_midiDev.open( QIODevice::ReadWrite |
+		QIODevice::Unbuffered ) ) ||
+		m_midiDev.open( QIODevice::ReadOnly |
+			QIODevice::Unbuffered ) )
 	{
 		start( QThread::LowPriority );
 	}