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| author | Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> | 2015-07-15 00:56:52 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-07-17 00:10:47 -0700 |
| commit | e2370f07cf703c0920c99bc24de3d152262738f0 (patch) | |
| tree | 774464cccb5fc59dc5785e83af1f3f3f478d1f7f | |
| parent | 15afb10df4a3f1bd781373ffd968e70cc4b21a42 (diff) | |
| download | blackbird-op-linux-e2370f07cf703c0920c99bc24de3d152262738f0.tar.gz blackbird-op-linux-e2370f07cf703c0920c99bc24de3d152262738f0.zip | |
ravb: do not invalidate cache for RX buffer twice
First, dma_sync_single_for_cpu() shouldn't have been called in the first place
(it's a streaming DMA API), dma_unmap_single() should have been called instead.
Second, dma_unmap_single() call after handing the buffer to napi_gro_receive()
makes little sense. Moreover desc->dptr might not be valid at this point.
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/ethernet/renesas/ravb_main.c | 10 |
1 files changed, 3 insertions, 7 deletions
diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c index fd9745714d90..0e5fde321630 100644 --- a/drivers/net/ethernet/renesas/ravb_main.c +++ b/drivers/net/ethernet/renesas/ravb_main.c @@ -543,10 +543,9 @@ static bool ravb_rx(struct net_device *ndev, int *quota, int q) skb = priv->rx_skb[q][entry]; priv->rx_skb[q][entry] = NULL; - dma_sync_single_for_cpu(&ndev->dev, - le32_to_cpu(desc->dptr), - ALIGN(PKT_BUF_SZ, 16), - DMA_FROM_DEVICE); + dma_unmap_single(&ndev->dev, le32_to_cpu(desc->dptr), + ALIGN(PKT_BUF_SZ, 16), + DMA_FROM_DEVICE); get_ts &= (q == RAVB_NC) ? RAVB_RXTSTAMP_TYPE_V2_L2_EVENT : ~RAVB_RXTSTAMP_TYPE_V2_L2_EVENT; @@ -584,9 +583,6 @@ static bool ravb_rx(struct net_device *ndev, int *quota, int q) if (!skb) break; /* Better luck next round. */ ravb_set_buffer_align(skb); - dma_unmap_single(&ndev->dev, le32_to_cpu(desc->dptr), - ALIGN(PKT_BUF_SZ, 16), - DMA_FROM_DEVICE); dma_addr = dma_map_single(&ndev->dev, skb->data, le16_to_cpu(desc->ds_cc), DMA_FROM_DEVICE); |
