--- x/net/bluetooth/hci_core.c
+++ y/net/bluetooth/hci_core.c
@@ -3237,7 +3237,13 @@ void hci_send_acl(struct hci_chan *chan,
 
 	hci_queue_acl(chan, &chan->data_q, skb, flags);
 
-	queue_work(hdev->workqueue, &hdev->tx_work);
+	rcu_read_lock();
+	if (test_bit(HCI_RESET, &hdev->flags) ||
+	    hci_dev_test_flag(hdev, HCI_CMD_DRAIN_WORKQUEUE))
+		;
+	else
+		queue_work(hdev->workqueue, &hdev->tx_work);
+	rcu_read_unlock();
 }
 
 /* Send SCO data */