diff --git a/block/nvme.c b/block/nvme.c
index 781d77d6d25cf80a053063beaab783978be14f4b..29294038fcc21ab9698311f793e8820b03baef7e 100644
--- a/block/nvme.c
+++ b/block/nvme.c
@@ -489,10 +489,8 @@ static void nvme_handle_event(EventNotifier *n)
     BDRVNVMeState *s = container_of(n, BDRVNVMeState, irq_notifier);
 
     trace_nvme_handle_event(s);
-    aio_context_acquire(s->aio_context);
     event_notifier_test_and_clear(n);
     nvme_poll_queues(s);
-    aio_context_release(s->aio_context);
 }
 
 static bool nvme_add_io_queue(BlockDriverState *bs, Error **errp)
diff --git a/iothread.c b/iothread.c
index aff128125769c384a019dfef8d6c354752600012..2fb1cdf55d10b882c78276221a0d0caaeba388a2 100644
--- a/iothread.c
+++ b/iothread.c
@@ -110,6 +110,7 @@ static void iothread_instance_init(Object *obj)
     IOThread *iothread = IOTHREAD(obj);
 
     iothread->poll_max_ns = IOTHREAD_POLL_MAX_NS_DEFAULT;
+    iothread->thread_id = -1;
 }
 
 static void iothread_instance_finalize(Object *obj)
@@ -117,6 +118,11 @@ static void iothread_instance_finalize(Object *obj)
     IOThread *iothread = IOTHREAD(obj);
 
     iothread_stop(iothread);
+
+    if (iothread->thread_id != -1) {
+        qemu_cond_destroy(&iothread->init_done_cond);
+        qemu_mutex_destroy(&iothread->init_done_lock);
+    }
     /*
      * Before glib2 2.33.10, there is a glib2 bug that GSource context
      * pointer may not be cleared even if the context has already been
@@ -135,8 +141,6 @@ static void iothread_instance_finalize(Object *obj)
         g_main_context_unref(iothread->worker_context);
         iothread->worker_context = NULL;
     }
-    qemu_cond_destroy(&iothread->init_done_cond);
-    qemu_mutex_destroy(&iothread->init_done_lock);
 }
 
 static void iothread_complete(UserCreatable *obj, Error **errp)
@@ -147,7 +151,6 @@ static void iothread_complete(UserCreatable *obj, Error **errp)
 
     iothread->stopping = false;
     iothread->running = true;
-    iothread->thread_id = -1;
     iothread->ctx = aio_context_new(&local_error);
     if (!iothread->ctx) {
         error_propagate(errp, local_error);