Polishing contribution

Closes gh-35978

spring-web/src/main/java/org/springframework/http/client/SubscriberInputStream.java

@@ -209,7 +209,7 @@ final class SubscriberInputStream<T> extends InputStream implements Flow.Subscri
 	}
 
 	private void resume() {
-		if (this.parkedThread != READY) {
+		if (this.parkedThread.get() != READY) {
 			Object old = this.parkedThread.getAndSet(READY);
 			if (old != READY) {
 				LockSupport.unpark((Thread) old);