diff --git a/mt7615/mcu.c b/mt7615/mcu.c
index a4e971d7..b24240f9 100644
--- a/mt7615/mcu.c
+++ b/mt7615/mcu.c
@@ -321,7 +321,9 @@ static int mt7615_mcu_send_firmware(struct mt7615_dev *dev, const void *data,
 
 		data += cur_len;
 		len -= cur_len;
-		mt76_queue_tx_cleanup(dev, MT_TXQ_FWDL, false);
+
+		if (mt76_is_mmio(&dev->mt76))
+			mt76_queue_tx_cleanup(dev, MT_TXQ_FWDL, false);
 	}
 
 	return ret;