octeon_ep: remove dma sync in trasmit path

Cleanup dma sync calls for scatter gather
mappings, since they are coherent allocations
and do not need explicit sync to be called.

Signed-off-by: Shinas Rasheed <srasheed@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/marvell/octeon_ep/octep_main.c b/drivers/net/ethernet/marvell/octeon_ep/octep_main.c
index 2c86b911a380fbd6f6bcc00486c082abd14b9d66..1c02304677c9e1624ee43a9f2442bc07330397bb 100644 (file)
--- a/drivers/net/ethernet/marvell/octeon_ep/octep_main.c
+++ b/drivers/net/ethernet/marvell/octeon_ep/octep_main.c
@@ -872,9 +872,6 @@ static netdev_tx_t octep_start_xmit(struct sk_buff *skb,
                if (dma_mapping_error(iq->dev, dma))
                        goto dma_map_err;
 
-               dma_sync_single_for_cpu(iq->dev, tx_buffer->sglist_dma,
-                                       OCTEP_SGLIST_SIZE_PER_PKT,
-                                       DMA_TO_DEVICE);
                memset(sglist, 0, OCTEP_SGLIST_SIZE_PER_PKT);
                sglist[0].len[3] = len;
                sglist[0].dma_ptr[0] = dma;
@@ -894,10 +891,6 @@ static netdev_tx_t octep_start_xmit(struct sk_buff *skb,
                        frag++;
                        si++;
                }
-               dma_sync_single_for_device(iq->dev, tx_buffer->sglist_dma,
-                                          OCTEP_SGLIST_SIZE_PER_PKT,
-                                          DMA_TO_DEVICE);
-
                hw_desc->dptr = tx_buffer->sglist_dma;
        }