net/fec: provide device for dma functions and matching sizes for map and unmap

This fixes warnings when CONFIG_DMA_API_DEBUG=y:

	NULL NULL: DMA-API: device driver tries to free DMA memory it has not allocated [device address=0x000000004781a020] [size=64 bytes]
	net eth0: DMA-API: device driver frees DMA memory with different size [device address=0x000000004781a020] [map size=2048 bytes] [unmap size=64 bytes]

Moreover pass the platform device to dma_{,un}map_single which makes
more sense because the logical network device doesn't know anything
about dma.

Passing the platform device was a suggestion by Lothar Waßmann.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>

diff --git a/drivers/net/fec.c b/drivers/net/fec.c
index 3f5dfe2..0c984d6 100644 (file)
--- a/drivers/net/fec.c
+++ b/drivers/net/fec.c
@@ -297,7 +297,7 @@ fec_enet_start_xmit(struct sk_buff *skb, struct net_device *ndev)
        /* Push the data cache so the CPM does not get stale memory
         * data.
         */
-       bdp->cbd_bufaddr = dma_map_single(&ndev->dev, bufaddr,
+       bdp->cbd_bufaddr = dma_map_single(&fep->pdev->dev, bufaddr,
                        FEC_ENET_TX_FRSIZE, DMA_TO_DEVICE);
 
        /* Send it on its way.  Tell FEC it's ready, interrupt when done,
@@ -497,7 +497,8 @@ fec_enet_tx(struct net_device *ndev)
                if (bdp == fep->cur_tx && fep->tx_full == 0)
                        break;
 
-               dma_unmap_single(&ndev->dev, bdp->cbd_bufaddr, FEC_ENET_TX_FRSIZE, DMA_TO_DEVICE);
+               dma_unmap_single(&fep->pdev->dev, bdp->cbd_bufaddr,
+                               FEC_ENET_TX_FRSIZE, DMA_TO_DEVICE);
                bdp->cbd_bufaddr = 0;
 
                skb = fep->tx_skbuff[fep->skb_dirty];
@@ -624,8 +625,8 @@ fec_enet_rx(struct net_device *ndev)
                ndev->stats.rx_bytes += pkt_len;
                data = (__u8*)__va(bdp->cbd_bufaddr);
 
-               dma_unmap_single(NULL, bdp->cbd_bufaddr, bdp->cbd_datlen,
-                               DMA_FROM_DEVICE);
+               dma_unmap_single(&fep->pdev->dev, bdp->cbd_bufaddr,
+                               FEC_ENET_TX_FRSIZE, DMA_FROM_DEVICE);
 
                if (id_entry->driver_data & FEC_QUIRK_SWAP_FRAME)
                        swap_buffer(data, pkt_len);
@@ -649,8 +650,8 @@ fec_enet_rx(struct net_device *ndev)
                        netif_rx(skb);
                }
 
-               bdp->cbd_bufaddr = dma_map_single(NULL, data, bdp->cbd_datlen,
-                       DMA_FROM_DEVICE);
+               bdp->cbd_bufaddr = dma_map_single(&fep->pdev->dev, data,
+                               FEC_ENET_TX_FRSIZE, DMA_FROM_DEVICE);
 rx_processing_done:
                /* Clear the status flags for this buffer */
                status &= ~BD_ENET_RX_STATS;
@@ -1075,7 +1076,7 @@ static void fec_enet_free_buffers(struct net_device *ndev)
                skb = fep->rx_skbuff[i];
 
                if (bdp->cbd_bufaddr)
-                       dma_unmap_single(&ndev->dev, bdp->cbd_bufaddr,
+                       dma_unmap_single(&fep->pdev->dev, bdp->cbd_bufaddr,
                                        FEC_ENET_RX_FRSIZE, DMA_FROM_DEVICE);
                if (skb)
                        dev_kfree_skb(skb);
@@ -1103,7 +1104,7 @@ static int fec_enet_alloc_buffers(struct net_device *ndev)
                }
                fep->rx_skbuff[i] = skb;
 
-               bdp->cbd_bufaddr = dma_map_single(&ndev->dev, skb->data,
+               bdp->cbd_bufaddr = dma_map_single(&fep->pdev->dev, skb->data,
                                FEC_ENET_RX_FRSIZE, DMA_FROM_DEVICE);
                bdp->cbd_sc = BD_ENET_RX_EMPTY;
                bdp++;