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Commit 777fbc31 authored by Jonas Jensen's avatar Jonas Jensen Committed by David S. Miller
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net: moxa: synchronize DMA memory 



DMA memory should be synchronized before data is passed
to/from controller.

Add dma_sync_single_for_cpu(.., DMA_FROM_DEVICE) to RX path
and dma_sync_single_for_device(.., DMA_TO_DEVICE) to TX path.

Signed-off-by: default avatarJonas Jensen <jonas.jensen@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 9fe1b3bc

drivers/net/ethernet/moxa/moxart_ether.c

+6 −0
Original line number Diff line number Diff line
@@ -226,6 +226,9 @@ static int moxart_rx_poll(struct napi_struct *napi, int budget) 
		if (len > RX_BUF_SIZE)

			len = RX_BUF_SIZE;



		dma_sync_single_for_cpu(&ndev->dev,

					priv->rx_mapping[rx_head],

					priv->rx_buf_size, DMA_FROM_DEVICE);

		skb = netdev_alloc_skb_ip_align(ndev, len);



		if (unlikely(!skb)) {
@@ -348,6 +351,9 @@ static int moxart_mac_start_xmit(struct sk_buff *skb, struct net_device *ndev) 
		len = ETH_ZLEN;

	}



	dma_sync_single_for_device(&ndev->dev, priv->tx_mapping[tx_head],

				   priv->tx_buf_size, DMA_TO_DEVICE);



	txdes1 = TX_DESC1_LTS | TX_DESC1_FTS | (len & TX_DESC1_BUF_SIZE_MASK);

	if (tx_head == TX_DESC_NUM_MASK)

		txdes1 |= TX_DESC1_END;