From 4d489ef7f4c7626a86b700b6d7144e35000ce387 Mon Sep 17 00:00:00 2001
From: Holger Steinhaus <holger@steinhaus-home.de>
Date: Tue, 11 Nov 2014 11:19:15 +0100
Subject: [PATCH] UAVCAN: improve mag compatibility

---
 src/modules/uavcan/sensors/mag.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/modules/uavcan/sensors/mag.cpp b/src/modules/uavcan/sensors/mag.cpp
index 0d9ea08c5f..4f56038b53 100644
--- a/src/modules/uavcan/sensors/mag.cpp
+++ b/src/modules/uavcan/sensors/mag.cpp
@@ -74,6 +74,9 @@ int UavcanMagnetometerBridge::init()
 int UavcanMagnetometerBridge::ioctl(struct file *filp, int cmd, unsigned long arg)
 {
 	switch (cmd) {
+	case SENSORIOCSQUEUEDEPTH: {
+		return OK;			// Pretend that this stuff is supported to keep APM happy
+	}
 	case MAGIOCSSCALE: {
 		std::memcpy(&_scale, reinterpret_cast<const void*>(arg), sizeof(_scale));
 		return 0;