Prevent crashing when disabling MCU during dream wakeup

AmbientMode attempting to send message to DozeHardware no longer results in an
uncaught IllegalStateException.  The exception was crashing Android Wear when
DozeHardware had already been released by PowerManagementService at time of
AmbientMode's message.

Change-Id: I5956a453802b5b764e88638f6b6d899cbc94cc8d

1 files changed, 3 insertions, 2 deletions

diff --git a/services/core/java/com/android/server/dreams/DreamManagerService.java b/services/core/java/com/android/server/dreams/DreamManagerService.java
index fd2f8a1..8968da3 100644
--- a/services/core/java/com/android/server/dreams/DreamManagerService.java
+++ b/services/core/java/com/android/server/dreams/DreamManagerService.java
@@ -642,8 +642,9 @@ public final class DreamManagerService extends SystemService {
             try {
                 synchronized (mMcuHal) {
                     if (mReleased) {
-                        throw new IllegalStateException("This operation cannot be performed "
-                                + "because the dream has ended.");
+                        Slog.w(TAG, "Ignoring message to MCU HAL because the dream "
+                                + "has already ended: " + msg);
+                        return null;
                     }
                     return mMcuHal.sendMessage(msg, arg);
                 }