Merge "aaudio: fix command thread busy loop."
diff --git a/services/oboeservice/AAudioServiceStreamBase.cpp b/services/oboeservice/AAudioServiceStreamBase.cpp
index 9f48f80..f4ee84f 100644
--- a/services/oboeservice/AAudioServiceStreamBase.cpp
+++ b/services/oboeservice/AAudioServiceStreamBase.cpp
@@ -435,7 +435,15 @@
             }
         }
         if (isIdle_l() && AudioClock::getNanoseconds() >= standbyTime) {
-            standby_l();
+            aaudio_result_t result = standby_l();
+            if (result != AAUDIO_OK) {
+                // If standby failed because of the function is not implemented, there is no
+                // need to retry. Otherwise, retry standby later.
+                ALOGW("Failed to enter standby, error=%d", result);
+                standbyTime = result == AAUDIO_ERROR_UNIMPLEMENTED
+                        ? std::numeric_limits<int64_t>::max()
+                        : AudioClock::getNanoseconds() + IDLE_TIMEOUT_NANOS;
+            }
         }
 
         if (command != nullptr) {
diff --git a/services/oboeservice/AAudioServiceStreamBase.h b/services/oboeservice/AAudioServiceStreamBase.h
index b2ba725..b5f8b90 100644
--- a/services/oboeservice/AAudioServiceStreamBase.h
+++ b/services/oboeservice/AAudioServiceStreamBase.h
@@ -320,7 +320,7 @@
     }
 
     virtual aaudio_result_t standby_l() REQUIRES(mLock) {
-        return AAUDIO_ERROR_UNAVAILABLE;
+        return AAUDIO_ERROR_UNIMPLEMENTED;
     }
     class ExitStandbyParam : public AAudioCommandParam {
     public: