net: ks8851: Delay requesting IRQ until opened

The ks8851 driver currently requests the IRQ before registering the
net_device.  Because the net_device name is used as IRQ name and is
still "eth%d" when the IRQ is requested, it's impossibe to tell IRQs
apart if multiple ks8851 chips are present.  Most other drivers delay
requesting the IRQ until the net_device is opened.  Do the same.

The driver doesn't enable interrupts on the chip before opening the
net_device and disables them when closing it, so there doesn't seem to
be a need to request the IRQ already on probe.

Signed-off-by: Lukas Wunner <lukas@wunner.de>
Cc: Frank Pavlic <f.pavlic@kunbus.de>
Cc: Ben Dooks <ben.dooks@codethink.co.uk>
Cc: Tristram Ha <Tristram.Ha@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/micrel/ks8851.c b/drivers/net/ethernet/micrel/ks8851.c
index 1633fa5..c9faec4 100644 (file)
--- a/drivers/net/ethernet/micrel/ks8851.c
+++ b/drivers/net/ethernet/micrel/ks8851.c
@@ -785,6 +785,15 @@ static void ks8851_tx_work(struct work_struct *work)
 static int ks8851_net_open(struct net_device *dev)
 {
        struct ks8851_net *ks = netdev_priv(dev);
+       int ret;
+
+       ret = request_threaded_irq(dev->irq, NULL, ks8851_irq,
+                                  IRQF_TRIGGER_LOW | IRQF_ONESHOT,
+                                  dev->name, ks);
+       if (ret < 0) {
+               netdev_err(dev, "failed to get irq\n");
+               return ret;
+       }
 
        /* lock the card, even if we may not actually be doing anything
         * else at the moment */
@@ -899,6 +908,8 @@ static int ks8851_net_stop(struct net_device *dev)
                dev_kfree_skb(txb);
        }
 
+       free_irq(dev->irq, ks);
+
        return 0;
 }
 
@@ -1529,14 +1540,6 @@ static int ks8851_probe(struct spi_device *spi)
        ks8851_read_selftest(ks);
        ks8851_init_mac(ks);
 
-       ret = request_threaded_irq(spi->irq, NULL, ks8851_irq,
-                                  IRQF_TRIGGER_LOW | IRQF_ONESHOT,
-                                  ndev->name, ks);
-       if (ret < 0) {
-               dev_err(&spi->dev, "failed to get irq\n");
-               goto err_irq;
-       }
-
        ret = register_netdev(ndev);
        if (ret) {
                dev_err(&spi->dev, "failed to register network device\n");
@@ -1549,11 +1552,7 @@ static int ks8851_probe(struct spi_device *spi)
 
        return 0;
 
-
 err_netdev:
-       free_irq(ndev->irq, ks);
-
-err_irq:
 err_id:
        if (gpio_is_valid(gpio))
                gpio_set_value(gpio, 0);
@@ -1574,7 +1573,6 @@ static int ks8851_remove(struct spi_device *spi)
                dev_info(&spi->dev, "remove\n");
 
        unregister_netdev(priv->netdev);
-       free_irq(spi->irq, priv);
        if (gpio_is_valid(priv->gpio))
                gpio_set_value(priv->gpio, 0);
        regulator_disable(priv->vdd_reg);