net: ks8851: Split out SPI specific code from probe() and remove()

Factor out common code into ks8851_probe_common() and
ks8851_remove_common() to permit both SPI and parallel
bus driver variants to use the common code path for
both probing and removal.

There should be no functional change.

Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: David S. Miller <davem@davemloft.net>
Cc: Lukas Wunner <lukas@wunner.de>
Cc: Petr Stetiar <ynezz@true.cz>
Cc: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/micrel/ks8851.c

@@ -1431,27 +1431,15 @@ static int ks8851_resume(struct device *dev)
 
 static SIMPLE_DEV_PM_OPS(ks8851_pm_ops, ks8851_suspend, ks8851_resume);
 
-static int ks8851_probe(struct spi_device *spi)
+static int ks8851_probe_common(struct net_device *netdev, struct device *dev,
+			       int msg_en)
 {
-	struct device *dev = &spi->dev;
-	struct ks8851_net_spi *kss;
-	struct net_device *netdev;
-	struct ks8851_net *ks;
-	int ret;
+	struct ks8851_net *ks = netdev_priv(netdev);
 	unsigned cider;
 	int gpio;
-
-	netdev = devm_alloc_etherdev(dev, sizeof(struct ks8851_net_spi));
-	if (!netdev)
-		return -ENOMEM;
-
-	spi->bits_per_word = 8;
-
-	ks = netdev_priv(netdev);
-	kss = to_ks8851_spi(ks);
+	int ret;
 
 	ks->netdev = netdev;
-	kss->spidev = spi;
 	ks->tx_space = 6144;
 
 	gpio = of_get_named_gpio_flags(dev->of_node, "reset-gpios", 0, NULL);
@@ -1497,23 +1485,11 @@ static int ks8851_probe(struct spi_device *spi)
 		gpio_set_value(gpio, 1);
 	}
 
-	mutex_init(&kss->lock);
 	spin_lock_init(&ks->statelock);
 
-	INIT_WORK(&kss->tx_work, ks8851_tx_work);
 	INIT_WORK(&ks->rxctrl_work, ks8851_rxctrl_work);
 
-	/* initialise pre-made spi transfer messages */
-
-	spi_message_init(&kss->spi_msg1);
-	spi_message_add_tail(&kss->spi_xfer1, &kss->spi_msg1);
-
-	spi_message_init(&kss->spi_msg2);
-	spi_message_add_tail(&kss->spi_xfer2[0], &kss->spi_msg2);
-	spi_message_add_tail(&kss->spi_xfer2[1], &kss->spi_msg2);
-
 	/* setup EEPROM state */
-
 	ks->eeprom.data = ks;
 	ks->eeprom.width = PCI_EEPROM_WIDTH_93C46;
 	ks->eeprom.register_read = ks8851_eeprom_regread;
@@ -1527,12 +1503,12 @@ static int ks8851_probe(struct spi_device *spi)
 	ks->mii.mdio_read	= ks8851_phy_read;
 	ks->mii.mdio_write	= ks8851_phy_write;
 
-	dev_info(dev, "message enable is %d\n", msg_enable);
+	dev_info(dev, "message enable is %d\n", msg_en);
 
 	/* set the default message enable */
-	ks->msg_enable = netif_msg_init(msg_enable, (NETIF_MSG_DRV |
-						     NETIF_MSG_PROBE |
-						     NETIF_MSG_LINK));
+	ks->msg_enable = netif_msg_init(msg_en, NETIF_MSG_DRV |
+						NETIF_MSG_PROBE |
+						NETIF_MSG_LINK);
 
 	skb_queue_head_init(&ks->txq);
 
@@ -1544,7 +1520,6 @@ static int ks8851_probe(struct spi_device *spi)
 	netif_carrier_off(ks->netdev);
 	netdev->if_port = IF_PORT_100BASET;
 	netdev->netdev_ops = &ks8851_netdev_ops;
-	netdev->irq = spi->irq;
 
 	/* issue a global soft reset to reset the device. */
 	ks8851_soft_reset(ks, GRR_GSR);
@@ -1586,12 +1561,9 @@ err_reg_io:
 	return ret;
 }
 
-static int ks8851_remove(struct spi_device *spi)
+static int ks8851_remove_common(struct device *dev)
 {
-	struct device *dev = &spi->dev;
-	struct ks8851_net *priv;
-
-	priv = dev_get_drvdata(dev);
+	struct ks8851_net *priv = dev_get_drvdata(dev);
 
 	if (netif_msg_drv(priv))
 		dev_info(dev, "remove\n");
@@ -1605,6 +1577,44 @@ static int ks8851_remove(struct spi_device *spi)
 	return 0;
 }
 
+static int ks8851_probe(struct spi_device *spi)
+{
+	struct device *dev = &spi->dev;
+	struct ks8851_net_spi *kss;
+	struct net_device *netdev;
+	struct ks8851_net *ks;
+
+	netdev = devm_alloc_etherdev(dev, sizeof(struct ks8851_net_spi));
+	if (!netdev)
+		return -ENOMEM;
+
+	spi->bits_per_word = 8;
+
+	ks = netdev_priv(netdev);
+	kss = to_ks8851_spi(ks);
+
+	kss->spidev = spi;
+	mutex_init(&kss->lock);
+	INIT_WORK(&kss->tx_work, ks8851_tx_work);
+
+	/* initialise pre-made spi transfer messages */
+	spi_message_init(&kss->spi_msg1);
+	spi_message_add_tail(&kss->spi_xfer1, &kss->spi_msg1);
+
+	spi_message_init(&kss->spi_msg2);
+	spi_message_add_tail(&kss->spi_xfer2[0], &kss->spi_msg2);
+	spi_message_add_tail(&kss->spi_xfer2[1], &kss->spi_msg2);
+
+	netdev->irq = spi->irq;
+
+	return ks8851_probe_common(netdev, dev, msg_enable);
+}
+
+static int ks8851_remove(struct spi_device *spi)
+{
+	return ks8851_remove_common(&spi->dev);
+}
+
 static const struct of_device_id ks8851_match_table[] = {
 	{ .compatible = "micrel,ks8851" },
 	{ }