Add null check for DisplayInfo of DEFAULT_DISPLAY

We are getting reports of DisplayInfo being null in this part of code.
The API "getDisplayInfo" is allowed to return null, so add this check
here.

Separately, we will discuss with the display manager team whether it's
normal / reasonable for the lookup of DEFAULT_DISPLAY to fail.

Bug: 331692058
Test: none
Change-Id: I1e89289ffa56b0c4459079aae035073d095788c9

1 files changed, 3 insertions, 0 deletions

diff --git a/services/core/java/com/android/server/input/AmbientKeyboardBacklightController.java b/services/core/java/com/android/server/input/AmbientKeyboardBacklightController.java
index ce868497b0e4..569322c8b501 100644
--- a/services/core/java/com/android/server/input/AmbientKeyboardBacklightController.java
+++ b/services/core/java/com/android/server/input/AmbientKeyboardBacklightController.java
@@ -234,6 +234,9 @@ final class AmbientKeyboardBacklightController implements DisplayManager.Display
         DisplayManagerInternal displayManagerInternal = LocalServices.getService(
                 DisplayManagerInternal.class);
         DisplayInfo displayInfo = displayManagerInternal.getDisplayInfo(Display.DEFAULT_DISPLAY);
+        if (displayInfo == null) {
+            return;
+        }
         synchronized (sAmbientControllerLock) {
             if (Objects.equals(mCurrentDefaultDisplayUniqueId, displayInfo.uniqueId)) {
                 return;