From f504789dd3b3073de176fd2fa09dd9fc9de5bc1f Mon Sep 17 00:00:00 2001
From: Aravind Akella <aakella@google.com>
Date: Mon, 20 Jul 2015 17:29:33 -0700
Subject: [PATCH] Check for the presence of accel and magnetometer sensors
 before adding AOSP fusion sensors.

Bug: 22502485
Change-Id: I3d9018649302b98004e4e216b2173e8411a08501
---
 services/sensorservice/SensorService.cpp | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/services/sensorservice/SensorService.cpp b/services/sensorservice/SensorService.cpp
index bb2d4f36e..40b21a96a 100644
--- a/services/sensorservice/SensorService.cpp
+++ b/services/sensorservice/SensorService.cpp
@@ -84,7 +84,7 @@ void SensorService::onFirstRef()
         ssize_t count = dev.getSensorList(&list);
         if (count > 0) {
             ssize_t orientationIndex = -1;
-            bool hasGyro = false;
+            bool hasGyro = false, hasAccel = false, hasMag = false;
             uint32_t virtualSensorsNeeds =
                     (1<<SENSOR_TYPE_GRAVITY) |
                     (1<<SENSOR_TYPE_LINEAR_ACCELERATION) |
@@ -94,6 +94,12 @@ void SensorService::onFirstRef()
             for (ssize_t i=0 ; i<count ; i++) {
                 registerSensor( new HardwareSensor(list[i]) );
                 switch (list[i].type) {
+                    case SENSOR_TYPE_ACCELEROMETER:
+                        hasAccel = true;
+                        break;
+                    case SENSOR_TYPE_MAGNETIC_FIELD:
+                        hasMag = true;
+                        break;
                     case SENSOR_TYPE_ORIENTATION:
                         orientationIndex = i;
                         break;
@@ -117,7 +123,7 @@ void SensorService::onFirstRef()
             // build the sensor list returned to users
             mUserSensorList = mSensorList;
 
-            if (hasGyro) {
+            if (hasGyro && hasAccel && hasMag) {
                 Sensor aSensor;
 
                 // Add Android virtual sensors if they're not already