netdevice: safe convert to netdev_priv() #part-3

We have some reasons to kill netdev->priv:
1. netdev->priv is equal to netdev_priv().
2. netdev_priv() wraps the calculation of netdev->priv's offset, obviously
   netdev_priv() is more flexible than netdev->priv.
But we cann't kill netdev->priv, because so many drivers reference to it
directly.

This patch is a safe convert for netdev->priv to netdev_priv(netdev).
Since all of the netdev->priv is only for read.
But it is too big to be sent in one mail.
I split it to 4 parts and make every part smaller than 100,000 bytes,
which is max size allowed by vger.

Signed-off-by: Wang Chen <wangchen@cn.fujitsu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/spider_net_ethtool.c b/drivers/net/spider_net_ethtool.c
index 85691d2..5bae728 100644
--- a/drivers/net/spider_net_ethtool.c
+++ b/drivers/net/spider_net_ethtool.c
@@ -118,7 +118,7 @@
 static u32
 spider_net_ethtool_get_rx_csum(struct net_device *netdev)
 {
-	struct spider_net_card *card = netdev->priv;
+	struct spider_net_card *card = netdev_priv(netdev);
 
 	return card->options.rx_csum;
 }
@@ -126,7 +126,7 @@
 static int
 spider_net_ethtool_set_rx_csum(struct net_device *netdev, u32 n)
 {
-	struct spider_net_card *card = netdev->priv;
+	struct spider_net_card *card = netdev_priv(netdev);
 
 	card->options.rx_csum = n;
 	return 0;
@@ -137,7 +137,7 @@
 spider_net_ethtool_get_ringparam(struct net_device *netdev,
 				 struct ethtool_ringparam *ering)
 {
-	struct spider_net_card *card = netdev->priv;
+	struct spider_net_card *card = netdev_priv(netdev);
 
 	ering->tx_max_pending = SPIDER_NET_TX_DESCRIPTORS_MAX;
 	ering->tx_pending = card->tx_chain.num_desc;
@@ -158,7 +158,7 @@
 static void spider_net_get_ethtool_stats(struct net_device *netdev,
 		struct ethtool_stats *stats, u64 *data)
 {
-	struct spider_net_card *card = netdev->priv;
+	struct spider_net_card *card = netdev_priv(netdev);
 
 	data[0] = netdev->stats.tx_packets;
 	data[1] = netdev->stats.tx_bytes;