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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>
This commit is contained in:
Lukas Wunner 2019-03-20 15:02:00 +01:00 committed by David S. Miller
parent 761cfa979a
commit d268f31552
1 changed files with 11 additions and 13 deletions
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24
drivers/net/ethernet/micrel/ks8851.c
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@ -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);