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Commit c0d0f2ca authored by Lennert Buytenhek's avatar Lennert Buytenhek Committed by Jeff Garzik
Browse files

mv643xx_eth: various cleanups 



- Remove unused MV643XX_DEFAULT_[RT]X_QUEUE_SIZE definitions.
- Remove ETH_TARGET enum -- it isn't used anywhere in the driver,
  and isn't even valid for non-mv643xx chip models, as those use
  different MBUS target IDs.
- Clean up comment and control flow in mv643xx_eth_change_mtu().
- Use mp->dev instead of mp->mii.dev in mv643xx_eth_tx_timeout_task().
- Make mv643xx_eth_free_tx_descs() static.
- Remove overzealous NULL check in mv643xx_eth_start_xmit().
- Use symbolic NETDEV_TX_* constants in mv643xx_eth_start_xmit().

Signed-off-by: default avatarLennert Buytenhek <buytenh@marvell.com>
Reviewed-by: default avatarTzachi Perelstein <tzachi@marvell.com>
Signed-off-by: default avatarDale Farnsworth <dale@farnsworth.org>
parent 4d64e718

drivers/net/mv643xx_eth.c

+16 −39
Original line number Diff line number Diff line
@@ -63,20 +63,6 @@ 
#define MV643XX_TX_FAST_REFILL

#undef	MV643XX_COAL



/*

 * Number of RX / TX descriptors on RX / TX rings.

 * Note that allocating RX descriptors is done by allocating the RX

 * ring AND a preallocated RX buffers (skb's) for each descriptor.

 * The TX descriptors only allocates the TX descriptors ring,

 * with no pre allocated TX buffers (skb's are allocated by higher layers.

 */



/* Default TX ring size is 1000 descriptors */

#define MV643XX_DEFAULT_TX_QUEUE_SIZE 1000



/* Default RX ring size is 400 descriptors */

#define MV643XX_DEFAULT_RX_QUEUE_SIZE 400



#define MV643XX_TX_COAL 100

#ifdef MV643XX_COAL

#define MV643XX_RX_COAL 100
@@ -434,14 +420,6 @@ typedef enum _eth_func_ret_status { 
	ETH_QUEUE_LAST_RESOURCE	/* Ring resources about to exhaust.	*/

} ETH_FUNC_RET_STATUS;



typedef enum _eth_target {

	ETH_TARGET_DRAM,

	ETH_TARGET_DEVICE,

	ETH_TARGET_CBS,

	ETH_TARGET_PCI0,

	ETH_TARGET_PCI1

} ETH_TARGET;



/* These are for big-endian machines.  Little endian needs different

 * definitions.

 */
@@ -615,7 +593,6 @@ static unsigned int mv643xx_eth_port_disable_tx(unsigned int port_num); 
static unsigned int mv643xx_eth_port_disable_rx(unsigned int port_num);

static int mv643xx_eth_open(struct net_device *);

static int mv643xx_eth_stop(struct net_device *);

static int mv643xx_eth_change_mtu(struct net_device *, int);

static void eth_port_init_mac_tables(unsigned int eth_port_num);

#ifdef MV643XX_NAPI

static int mv643xx_poll(struct napi_struct *napi, int budget);
@@ -659,17 +636,18 @@ static int mv643xx_eth_change_mtu(struct net_device *dev, int new_mtu) 
		return -EINVAL;



	dev->mtu = new_mtu;

	if (!netif_running(dev))

		return 0;



	/*

	 * Stop then re-open the interface. This will allocate RX skb's with

	 * the new MTU.

	 * There is a possible danger that the open will not successed, due

	 * to memory is full, which might fail the open function.

	 * Stop and then re-open the interface. This will allocate RX

	 * skbs of the new MTU.

	 * There is a possible danger that the open will not succeed,

	 * due to memory being full, which might fail the open function.

	 */

	if (netif_running(dev)) {

	mv643xx_eth_stop(dev);

		if (mv643xx_eth_open(dev))

			printk(KERN_ERR

				"%s: Fatal error on opening device\n",

	if (mv643xx_eth_open(dev)) {

		printk(KERN_ERR "%s: Fatal error on opening device\n",

			dev->name);

	}
@@ -826,7 +804,7 @@ static void mv643xx_eth_tx_timeout_task(struct work_struct *ugly) 
{

	struct mv643xx_private *mp = container_of(ugly, struct mv643xx_private,

						  tx_timeout_task);

	struct net_device *dev = mp->mii.dev; /* yuck */

	struct net_device *dev = mp->dev;



	if (!netif_running(dev))

		return;
@@ -845,7 +823,7 @@ static void mv643xx_eth_tx_timeout_task(struct work_struct *ugly) 
 *

 * If force is non-zero, frees uncompleted descriptors as well

 */

int mv643xx_eth_free_tx_descs(struct net_device *dev, int force)

static int mv643xx_eth_free_tx_descs(struct net_device *dev, int force)

{

	struct mv643xx_private *mp = netdev_priv(dev);

	struct eth_tx_desc *desc;
@@ -1739,13 +1717,12 @@ static int mv643xx_eth_start_xmit(struct sk_buff *skb, struct net_device *dev) 
	unsigned long flags;



	BUG_ON(netif_queue_stopped(dev));

	BUG_ON(skb == NULL);



	if (has_tiny_unaligned_frags(skb) && __skb_linearize(skb)) {

		stats->tx_dropped++;

		printk(KERN_DEBUG "%s: failed to linearize tiny "

				"unaligned fragment\n", dev->name);

		return 1;

		return NETDEV_TX_BUSY;

	}



	spin_lock_irqsave(&mp->lock, flags);
@@ -1754,7 +1731,7 @@ static int mv643xx_eth_start_xmit(struct sk_buff *skb, struct net_device *dev) 
		printk(KERN_ERR "%s: transmit with queue full\n", dev->name);

		netif_stop_queue(dev);

		spin_unlock_irqrestore(&mp->lock, flags);

		return 1;

		return NETDEV_TX_BUSY;

	}



	eth_tx_submit_descs_for_skb(mp, skb);
@@ -1767,7 +1744,7 @@ static int mv643xx_eth_start_xmit(struct sk_buff *skb, struct net_device *dev) 


	spin_unlock_irqrestore(&mp->lock, flags);



	return 0;		/* success */

	return NETDEV_TX_OK;

}



#ifdef CONFIG_NET_POLL_CONTROLLER