kernel: readable_event: Signal only once.

1 files changed, 4 insertions, 2 deletions

diff --git a/src/core/hle/kernel/readable_event.cpp b/src/core/hle/kernel/readable_event.cpp
index 7c291b426..d8ac97aa1 100644
--- a/src/core/hle/kernel/readable_event.cpp
+++ b/src/core/hle/kernel/readable_event.cpp
@@ -23,8 +23,10 @@ void ReadableEvent::Acquire(Thread* thread) {
 }
 
 void ReadableEvent::Signal() {
-    signaled = true;
-    WakeupAllWaitingThreads();
+    if (!signaled) {
+        signaled = true;
+        WakeupAllWaitingThreads();
+    };
 }
 
 void ReadableEvent::Clear() {