diff options
| author |   Jonas Jensen <jonas.jensen@gmail.com> | 2014-08-25 16:22:32 +0200 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2014-08-25 17:25:39 -0700 |
| commit | 777fbc31447f111a1492c90fae2bc616f836d407 (patch) | |
| tree | 46267cecb890c639fc2e690517a6d9388a01e075 | |
| parent | net: moxa: replace build_skb() with netdev_alloc_skb_ip_align() / memcpy() (diff) | |
| download | linux-dev-777fbc31447f111a1492c90fae2bc616f836d407.tar.xz linux-dev-777fbc31447f111a1492c90fae2bc616f836d407.zip | |
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: Jonas Jensen <jonas.jensen@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/ethernet/moxa/moxart_ether.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/net/ethernet/moxa/moxart_ether.c b/drivers/net/ethernet/moxa/moxart_ether.c index d66058d5c429..983d01949795 100644 --- a/drivers/net/ethernet/moxa/moxart_ether.c +++ b/drivers/net/ethernet/moxa/moxart_ether.c @@ -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; |