From c53f1d39aacdc00ea76836d3d5503ffcf5c0053f Mon Sep 17 00:00:00 2001
From: "andrey.bychkov" <andrey@signalmodelling.ru>
Date: Wed, 5 Aug 2026 12:03:56 +0300
Subject: [PATCH] fix piethernet blocking write return value

---
 libs/main/io_devices/piethernet.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/libs/main/io_devices/piethernet.cpp b/libs/main/io_devices/piethernet.cpp
index 7cb7a1dc..16f8e24c 100644
--- a/libs/main/io_devices/piethernet.cpp
+++ b/libs/main/io_devices/piethernet.cpp
@@ -861,6 +861,7 @@ ssize_t PIEthernet::writeDevice(const void * data, ssize_t max_size) {
 						return -1;
 					}
 				}
+				ret += sr;
 				remain_data += sr;
 				remain_size -= sr;
 			}