net: fec: align rx data buffer size for dma map/unmap

Align allocated rx data buffer size for dma map/unmap, otherwise
kernel print warning when enable DMA_API_DEBUG.

Signed-off-by: Fugang Duan <B38611@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 5 insertions, 3 deletions

diff --git a/drivers/net/ethernet/freescale/fec_main.c b/drivers/net/ethernet/freescale/fec_main.c
index a08256fe8ef6..3d12a841ad15 100644
--- a/drivers/net/ethernet/freescale/fec_main.c
+++ b/drivers/net/ethernet/freescale/fec_main.c
@@ -1403,7 +1403,8 @@ fec_enet_rx_queue(struct net_device *ndev, int budget, u16 queue_id)
                 index = fec_enet_get_bd_index(rxq->rx_bd_base, bdp, fep);
                 data = rxq->rx_skbuff[index]->data;
                 dma_sync_single_for_cpu(&fep->pdev->dev, bdp->cbd_bufaddr,
-                                        FEC_ENET_RX_FRSIZE, DMA_FROM_DEVICE);
+                                        FEC_ENET_RX_FRSIZE - fep->rx_align,
+                                        DMA_FROM_DEVICE);
 
                 if (id_entry->driver_data & FEC_QUIRK_SWAP_FRAME)
                         swap_buffer(data, pkt_len);
@@ -1475,7 +1476,8 @@ fec_enet_rx_queue(struct net_device *ndev, int budget, u16 queue_id)
                 }
 
                 dma_sync_single_for_device(&fep->pdev->dev, bdp->cbd_bufaddr,
-                                        FEC_ENET_RX_FRSIZE, DMA_FROM_DEVICE);
+                                           FEC_ENET_RX_FRSIZE - fep->rx_align,
+                                           DMA_FROM_DEVICE);
 rx_processing_done:
                 /* Clear the status flags for this buffer */
                 status &= ~BD_ENET_RX_STATS;
@@ -2448,7 +2450,7 @@ static void fec_enet_free_buffers(struct net_device *ndev)
                         if (skb) {
                                 dma_unmap_single(&fep->pdev->dev,
                                                  bdp->cbd_bufaddr,
-                                                 FEC_ENET_RX_FRSIZE,
+                                                 FEC_ENET_RX_FRSIZE - fep->rx_align,
                                                  DMA_FROM_DEVICE);
                                 dev_kfree_skb(skb);
                         }