From 8cdaaaee34a969d2ea518d75e2d91063020fa639 Mon Sep 17 00:00:00 2001
From: RichardG867 <richardg867@gmail.com>
Date: Fri, 9 Jun 2023 12:20:30 -0300
Subject: [PATCH] win_serial_passthrough: Disable intermediate buffering on
 serial ports

---
 src/win/win_serial_passthrough.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/win/win_serial_passthrough.c b/src/win/win_serial_passthrough.c
index cffa7c84b..fc1e49d6c 100644
--- a/src/win/win_serial_passthrough.c
+++ b/src/win/win_serial_passthrough.c
@@ -194,7 +194,7 @@ open_host_serial_port(serial_passthrough_t *dev)
     DCB *serialattr = calloc(1, sizeof(DCB));
     if (!serialattr)
         return 0;
-    dev->master_fd = (intptr_t) CreateFileA(dev->host_serial_path, GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING, 0, NULL);
+    dev->master_fd = (intptr_t) CreateFileA(dev->host_serial_path, GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING, FILE_FLAG_WRITE_THROUGH, NULL);
     if (dev->master_fd == (intptr_t) INVALID_HANDLE_VALUE) {
         free(serialattr);
         return 0;