From 67f3234b5b3fc42ccd4f01544269d3c336ba8c86 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Beat=20K=C3=BCng?= <beat-kueng@gmx.net>
Date: Wed, 22 Jan 2020 16:53:43 +0100
Subject: [PATCH] posix cdev_platform: set errno on px4_open failure

---
 src/lib/cdev/posix/cdev_platform.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/lib/cdev/posix/cdev_platform.cpp b/src/lib/cdev/posix/cdev_platform.cpp
index c643792f0a..c6a9853f66 100644
--- a/src/lib/cdev/posix/cdev_platform.cpp
+++ b/src/lib/cdev/posix/cdev_platform.cpp
@@ -201,6 +201,7 @@ extern "C" {
 		}
 
 		if (ret < 0) {
+			errno = -ret;
 			return -1;
 		}