mv643xx_eth: Place explicit port number in mv643xx_eth_platform_data

We were using the platform_device.id field to identify which ethernet
port is used for mv643xx_eth device.  This is not generally correct.
It will be incorrect, for example, if a hardware platform uses a single
port but not the first port.  Here, we add an explicit port_number field
to struct mv643xx_eth_platform_data.

This makes the mv643xx_eth_platform_data structure required, but that
isn't an issue since all users currently provide it already.

Signed-off-by: Dale Farnsworth <dale@farnsworth.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 29 insertions, 24 deletions

diff --git a/drivers/net/mv643xx_eth.c b/drivers/net/mv643xx_eth.c
index be2ddbb6ef5..9ba21e0f27c 100644
--- a/drivers/net/mv643xx_eth.c
+++ b/drivers/net/mv643xx_eth.c
@@ -1309,7 +1309,7 @@ static void mv643xx_init_ethtool_cmd(struct net_device *dev, int phy_address,
 static int mv643xx_eth_probe(struct platform_device *pdev)
 {
 	struct mv643xx_eth_platform_data *pd;
-	int port_num = pdev->id;
+	int port_num;
 	struct mv643xx_private *mp;
 	struct net_device *dev;
 	u8 *p;
@@ -1319,6 +1319,12 @@ static int mv643xx_eth_probe(struct platform_device *pdev)
 	int duplex = DUPLEX_HALF;
 	int speed = 0;			/* default to auto-negotiation */
 
+	pd = pdev->dev.platform_data;
+	if (pd == NULL) {
+		printk(KERN_ERR "No mv643xx_eth_platform_data\n");
+		return -ENODEV;
+	}
+
 	dev = alloc_etherdev(sizeof(struct mv643xx_private));
 	if (!dev)
 		return -ENOMEM;
@@ -1331,8 +1337,6 @@ static int mv643xx_eth_probe(struct platform_device *pdev)
 	BUG_ON(!res);
 	dev->irq = res->start;
 
-	mp->port_num = port_num;
-
 	dev->open = mv643xx_eth_open;
 	dev->stop = mv643xx_eth_stop;
 	dev->hard_start_xmit = mv643xx_eth_start_xmit;
@@ -1373,39 +1377,40 @@ static int mv643xx_eth_probe(struct platform_device *pdev)
 
 	spin_lock_init(&mp->lock);
 
+	port_num = pd->port_number;
+
 	/* set default config values */
 	eth_port_uc_addr_get(dev, dev->dev_addr);
 	mp->rx_ring_size = MV643XX_ETH_PORT_DEFAULT_RECEIVE_QUEUE_SIZE;
 	mp->tx_ring_size = MV643XX_ETH_PORT_DEFAULT_TRANSMIT_QUEUE_SIZE;
 
-	pd = pdev->dev.platform_data;
-	if (pd) {
-		if (is_valid_ether_addr(pd->mac_addr))
-			memcpy(dev->dev_addr, pd->mac_addr, 6);
+	if (is_valid_ether_addr(pd->mac_addr))
+		memcpy(dev->dev_addr, pd->mac_addr, 6);
 
-		if (pd->phy_addr || pd->force_phy_addr)
-			ethernet_phy_set(port_num, pd->phy_addr);
+	if (pd->phy_addr || pd->force_phy_addr)
+		ethernet_phy_set(port_num, pd->phy_addr);
 
-		if (pd->rx_queue_size)
-			mp->rx_ring_size = pd->rx_queue_size;
+	if (pd->rx_queue_size)
+		mp->rx_ring_size = pd->rx_queue_size;
 
-		if (pd->tx_queue_size)
-			mp->tx_ring_size = pd->tx_queue_size;
+	if (pd->tx_queue_size)
+		mp->tx_ring_size = pd->tx_queue_size;
 
-		if (pd->tx_sram_size) {
-			mp->tx_sram_size = pd->tx_sram_size;
-			mp->tx_sram_addr = pd->tx_sram_addr;
-		}
-
-		if (pd->rx_sram_size) {
-			mp->rx_sram_size = pd->rx_sram_size;
-			mp->rx_sram_addr = pd->rx_sram_addr;
-		}
+	if (pd->tx_sram_size) {
+		mp->tx_sram_size = pd->tx_sram_size;
+		mp->tx_sram_addr = pd->tx_sram_addr;
+	}
 
-		duplex = pd->duplex;
-		speed = pd->speed;
+	if (pd->rx_sram_size) {
+		mp->rx_sram_size = pd->rx_sram_size;
+		mp->rx_sram_addr = pd->rx_sram_addr;
 	}
 
+	duplex = pd->duplex;
+	speed = pd->speed;
+
+	mp->port_num = port_num;
+
 	/* Hook up MII support for ethtool */
 	mp->mii.dev = dev;
 	mp->mii.mdio_read = mv643xx_mdio_read;