greth: convert to SKB paged frag API.

In order to avoid long lines also use phys_to_virt(page_to_phys(page)) =>
page_address(page) (since the are effectively the same thing for lowmem pages).

Also dump the frag's size instead of the headlen when dumping a frag.
Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Cc: netdev@vger.kernel.org
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/aeroflex/greth.c

@@ -113,9 +113,8 @@ static void greth_print_tx_packet(struct sk_buff *skb)
 	for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
 
 		print_hex_dump(KERN_DEBUG, "TX: ", DUMP_PREFIX_OFFSET, 16, 1,
-			       phys_to_virt(page_to_phys(skb_shinfo(skb)->frags[i].page)) +
-			       skb_shinfo(skb)->frags[i].page_offset,
-			       length, true);
+			       skb_frag_address(&skb_shinfo(skb)->frags[i]),
+			       skb_shinfo(skb)->frags[i].size, true);
 	}
 }
 
@@ -528,10 +527,7 @@ greth_start_xmit_gbit(struct sk_buff *skb, struct net_device *dev)
 
 		greth_write_bd(&bdp->stat, status);
 
-		dma_addr = dma_map_page(greth->dev,
-					frag->page,
-					frag->page_offset,
-					frag->size,
+		dma_addr = skb_frag_dma_map(greth->dev, frag, 0, frag->size,
 					    DMA_TO_DEVICE);
 
 		if (unlikely(dma_mapping_error(greth->dev, dma_addr)))