From 16179894d2e76858b3f105fa3952718cbae3dece Mon Sep 17 00:00:00 2001
From: XANTRONIX Development <dev@xantronix.com>
Date: Mon, 3 Aug 2020 02:15:10 -0400
Subject: [PATCH] Add tcdrain() at end of patty_kiss_tnc_send()

---
 src/kiss.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/kiss.c b/src/kiss.c
index 9825ca7..3dedd43 100644
--- a/src/kiss.c
+++ b/src/kiss.c
@@ -376,6 +376,10 @@ ssize_t patty_kiss_tnc_send(patty_kiss_tnc *tnc,
         goto error_io;
     }
 
+    if (tcdrain(tnc->fd) < 0) {
+        goto error_io;
+    }
+
     return len;
 
 error_io: