8139cp: balance dma_map_single vs dma_unmap_single pair

The driver always:
1. allocate cp->rx_buf_sz + NET_IP_ALIGN
2. map cp->rx_buf_sz

Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/8139cp.c b/drivers/net/8139cp.c
index 50efde1..d0dbbf3 100644 (file)
--- a/drivers/net/8139cp.c
+++ b/drivers/net/8139cp.c
@@ -515,7 +515,7 @@ rx_status_loop:
                dma_addr_t mapping;
                struct sk_buff *skb, *new_skb;
                struct cp_desc *desc;
-               unsigned buflen;
+               const unsigned buflen = cp->rx_buf_sz;
 
                skb = cp->rx_skb[rx_tail];
                BUG_ON(!skb);
@@ -549,8 +549,7 @@ rx_status_loop:
                        pr_debug("%s: rx slot %d status 0x%x len %d\n",
                               dev->name, rx_tail, status, len);
 
-               buflen = cp->rx_buf_sz + NET_IP_ALIGN;
-               new_skb = netdev_alloc_skb(dev, buflen);
+               new_skb = netdev_alloc_skb(dev, buflen + NET_IP_ALIGN);
                if (!new_skb) {
                        dev->stats.rx_dropped++;
                        goto rx_next;