From 825d754036d2fe1b904bc3fe8301971ce550a6e1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Beat=20K=C3=BCng?= <beat-kueng@gmx.net>
Date: Tue, 26 Apr 2016 11:07:08 +0200
Subject: [PATCH] orb nuttx: add irqsave() guard around 64bit timestamp readout

---
 src/modules/uORB/uORBDevices_nuttx.cpp | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/src/modules/uORB/uORBDevices_nuttx.cpp b/src/modules/uORB/uORBDevices_nuttx.cpp
index d9271d085b..19b814e699 100644
--- a/src/modules/uORB/uORBDevices_nuttx.cpp
+++ b/src/modules/uORB/uORBDevices_nuttx.cpp
@@ -267,9 +267,12 @@ uORB::DeviceNode::ioctl(struct file *filp, int cmd, unsigned long arg)
 	SubscriberData *sd = filp_to_sd(filp);
 
 	switch (cmd) {
-	case ORBIOCLASTUPDATE:
-		*(hrt_abstime *)arg = _last_update;
-		return OK;
+	case ORBIOCLASTUPDATE: {
+			irqstate_t state = irqsave();
+			*(hrt_abstime *)arg = _last_update;
+			irqrestore(state);
+			return OK;
+		}
 
 	case ORBIOCUPDATED:
 		*(bool *)arg = appears_updated(sd);