From 254f22e372ff1155e76bea2c9a6f9c6c85a94868 Mon Sep 17 00:00:00 2001
From: Robin Gareus <robin@gareus.org>
Date: Tue, 7 Jan 2020 03:59:25 +0100
Subject: [PATCH] Fix MIDI disk-writer flush

to_write must not exceed `total = _samples_pending_write`.
If the write succeeds (events spanning `to_write` samples are written)
to_write is atomically subtracted from `_samples_pending_write`.
---
 libs/ardour/disk_writer.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libs/ardour/disk_writer.cc b/libs/ardour/disk_writer.cc
index 6a455318e9..33a9187ca2 100644
--- a/libs/ardour/disk_writer.cc
+++ b/libs/ardour/disk_writer.cc
@@ -991,7 +991,7 @@ DiskWriter::do_flush (RunContext ctxt, bool force_flush)
 
 		if (force_flush) {
 			/* push out everything we have, right now */
-			to_write = UINT32_MAX;
+			to_write = total;
 		} else {
 			to_write = _chunk_samples;
 		}