From a2ef611a30b02857dfe727ef06b17aa74d5e181f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Beat=20K=C3=BCng?= <beat-kueng@gmx.net>
Date: Fri, 21 Jul 2017 14:22:28 +0200
Subject: [PATCH] dataman: improve error reporting

---
 src/modules/dataman/dataman.cpp         | 2 +-
 src/modules/mavlink/mavlink_mission.cpp | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/modules/dataman/dataman.cpp b/src/modules/dataman/dataman.cpp
index 899deba8d5..daca663cd6 100644
--- a/src/modules/dataman/dataman.cpp
+++ b/src/modules/dataman/dataman.cpp
@@ -637,7 +637,7 @@ _file_read(dm_item_t item, unsigned index, void *buf, size_t count)
 
 	/* Check for read error */
 	if (len < 0) {
-		return -1;
+		return -errno;
 	}
 
 	/* A zero length entry is a empty entry */
diff --git a/src/modules/mavlink/mavlink_mission.cpp b/src/modules/mavlink/mavlink_mission.cpp
index 9b3ec703b3..7d9562a70a 100644
--- a/src/modules/mavlink/mavlink_mission.cpp
+++ b/src/modules/mavlink/mavlink_mission.cpp
@@ -120,7 +120,7 @@ MavlinkMissionManager::init_offboard_mission()
 			_current_seq = mission_state.current_seq;
 
 		} else if (ret < 0) {
-			PX4_ERR("offboard mission init failed (%i)", errno);
+			PX4_ERR("offboard mission init failed (%i)", ret);
 		}
 
 		load_geofence_stats();