net: sh_eth: fix cache coherency issue

Fix the problem that may not work receive process by cache coherency issue.

Signed-off-by: Yoshihiro Shimoda <shimoda.yoshihiro@renesas.com>
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu.nobuhiro@renesas.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/net/sh_eth.c b/drivers/net/sh_eth.c
index 3ab28bb00c12..a742297e3e94 100644
--- a/drivers/net/sh_eth.c
+++ b/drivers/net/sh_eth.c
@@ -250,6 +250,8 @@ static void sh_eth_ring_format(struct net_device *ndev)
                 mdp->rx_skbuff[i] = skb;
                 if (skb == NULL)
                         break;
+                dma_map_single(&ndev->dev, skb->tail, mdp->rx_buf_sz,
+                                DMA_FROM_DEVICE);
                 skb->dev = ndev; /* Mark as being used by this device. */
 #if defined(CONFIG_CPU_SUBTYPE_SH7763)
                 reserve = SH7763_SKB_ALIGN
@@ -559,6 +561,8 @@ static int sh_eth_rx(struct net_device *ndev)
                         mdp->rx_skbuff[entry] = skb;
                         if (skb == NULL)
                                 break;  /* Better luck next round. */
+                        dma_map_single(&ndev->dev, skb->tail, mdp->rx_buf_sz,
+                                        DMA_FROM_DEVICE);
                         skb->dev = ndev;
 #if defined(CONFIG_CPU_SUBTYPE_SH7763)
                         reserve = SH7763_SKB_ALIGN