From 3b62e842895fe569cc6e943c12b68801b95cfbf4 Mon Sep 17 00:00:00 2001
From: Jorim Jaggi <jjaggi@google.com>
Date: Tue, 14 Apr 2015 11:14:19 -0700
Subject: [PATCH] Fix crash in settings when no fingerprint is available

Bug: 20207600
Change-Id: If2a6251b085f22fffabc43aee197550328e6bfef
---
 src/com/android/settings/FingerprintUiHelper.java | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/com/android/settings/FingerprintUiHelper.java b/src/com/android/settings/FingerprintUiHelper.java
index 20ad7fc50c4..f4a02759851 100644
--- a/src/com/android/settings/FingerprintUiHelper.java
+++ b/src/com/android/settings/FingerprintUiHelper.java
@@ -56,8 +56,10 @@ public class FingerprintUiHelper extends FingerprintManager.AuthenticationCallba
     }
 
     public void stopListening() {
-        mCancellationSignal.cancel();
-        mCancellationSignal = null;
+        if (mCancellationSignal != null) {
+            mCancellationSignal.cancel();
+            mCancellationSignal = null;
+        }
     }
 
     private void setFingerprintIconVisibility(boolean visible) {