From 549d456ec705d1f40e3123ebf213d5203e7ef319 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Beat=20K=C3=BCng?= <beat-kueng@gmx.net>
Date: Tue, 27 Sep 2016 13:00:38 +0200
Subject: [PATCH] uorb devices: set errno on write error

---
 src/modules/uORB/uORBDevices.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/modules/uORB/uORBDevices.cpp b/src/modules/uORB/uORBDevices.cpp
index 699e673daa..de4d99129d 100644
--- a/src/modules/uORB/uORBDevices.cpp
+++ b/src/modules/uORB/uORBDevices.cpp
@@ -437,6 +437,7 @@ uORB::DeviceNode::publish(const orb_metadata *meta, orb_advert_t handle, const v
 	ret = devnode->write(nullptr, (const char *)data, meta->o_size);
 
 	if (ret < 0) {
+		errno = -ret;
 		return ERROR;
 	}