From patchwork series 491005

https://patchwork.ozlabs.org//project/linuxppc-dev/list/?series=491005

Author: Fox Snowpatch

drivers/net/wan/fsl_ucc_hdlc.c

@@ -790,19 +790,11 @@ static void uhdlc_memclean(struct ucc_hdlc_private *priv)
 
 	if (priv->rx_buffer) {
 		dma_free_coherent(priv->dev,
-				  RX_BD_RING_LEN * MAX_RX_BUF_LENGTH,
+				  (RX_BD_RING_LEN + TX_BD_RING_LEN) * MAX_RX_BUF_LENGTH,
 				  priv->rx_buffer, priv->dma_rx_addr);
 		priv->rx_buffer = NULL;
 		priv->dma_rx_addr = 0;
 	}
-
-	if (priv->tx_buffer) {
-		dma_free_coherent(priv->dev,
-				  TX_BD_RING_LEN * MAX_RX_BUF_LENGTH,
-				  priv->tx_buffer, priv->dma_tx_addr);
-		priv->tx_buffer = NULL;
-		priv->dma_tx_addr = 0;
-	}
 }
 
 static int uhdlc_close(struct net_device *dev)