dpaa_eth: cleanup skb_to_contig_fd()

Remove cast, align variable name, simplify DMA map size computation.

Signed-off-by: Madalin Bucur <madalin.bucur@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/freescale/dpaa/dpaa_eth.c b/drivers/net/ethernet/freescale/dpaa/dpaa_eth.c
index a278651..f3aa154 100644 (file)
--- a/drivers/net/ethernet/freescale/dpaa/dpaa_eth.c
+++ b/drivers/net/ethernet/freescale/dpaa/dpaa_eth.c
@@ -1369,7 +1369,7 @@ static void count_ern(struct dpaa_percpu_priv *percpu_priv,
 static int dpaa_enable_tx_csum(struct dpaa_priv *priv,
                               struct sk_buff *skb,
                               struct qm_fd *fd,
-                              char *parse_results)
+                              void *parse_results)
 {
        struct fman_prs_result *parse_result;
        u16 ethertype = ntohs(skb->protocol);
@@ -1831,7 +1831,7 @@ static int skb_to_contig_fd(struct dpaa_priv *priv,
 {
        struct net_device *net_dev = priv->net_dev;
        enum dma_data_direction dma_dir;
-       unsigned char *buffer_start;
+       unsigned char *buff_start;
        struct sk_buff **skbh;
        dma_addr_t addr;
        int err;
@@ -1840,10 +1840,10 @@ static int skb_to_contig_fd(struct dpaa_priv *priv,
         * available, so just use that for offset.
         */
        fd->bpid = FSL_DPAA_BPID_INV;
-       buffer_start = skb->data - priv->tx_headroom;
+       buff_start = skb->data - priv->tx_headroom;
        dma_dir = DMA_TO_DEVICE;
 
-       skbh = (struct sk_buff **)buffer_start;
+       skbh = (struct sk_buff **)buff_start;
        *skbh = skb;
 
        /* Enable L3/L4 hardware checksum computation.
@@ -1852,7 +1852,7 @@ static int skb_to_contig_fd(struct dpaa_priv *priv,
         * need to write into the skb.
         */
        err = dpaa_enable_tx_csum(priv, skb, fd,
-                                 ((char *)skbh) + DPAA_TX_PRIV_DATA_SIZE);
+                                 buff_start + DPAA_TX_PRIV_DATA_SIZE);
        if (unlikely(err < 0)) {
                if (net_ratelimit())
                        netif_err(priv, tx_err, net_dev, "HW csum error: %d\n",
@@ -1865,8 +1865,8 @@ static int skb_to_contig_fd(struct dpaa_priv *priv,
        fd->cmd |= cpu_to_be32(FM_FD_CMD_FCO);
 
        /* Map the entire buffer size that may be seen by FMan, but no more */
-       addr = dma_map_single(priv->tx_dma_dev, skbh,
-                             skb_tail_pointer(skb) - buffer_start, dma_dir);
+       addr = dma_map_single(priv->tx_dma_dev, buff_start,
+                             priv->tx_headroom + skb->len, dma_dir);
        if (unlikely(dma_mapping_error(priv->tx_dma_dev, addr))) {
                if (net_ratelimit())
                        netif_err(priv, tx_err, net_dev, "dma_map_single() failed\n");