I think this is how it should be done, but
please review: it was not tested.
--
Balance alloc/free and ioremap/iounmap
Signed-off-by: Roel Kluin <[EMAIL PROTECTED]>
---
diff --git a/arch/powerpc/platforms/pasemi/gpio_mdio.c
b/arch/powerpc/platforms/pasemi/gpio_mdio.c
index dae9f65..f250ba4 100644
--- a/arch/powerpc/platforms/pasemi/gpio_mdio.c
+++ b/arch/powerpc/platforms/pasemi/gpio_mdio.c
@@ -208,95 +208,116 @@ static int gpio_mdio_write(struct mii_bus *bus, int
phy_id, int location, u16 va
}
static int gpio_mdio_reset(struct mii_bus *bus)
{
/*nothing here - dunno how to reset it*/
return 0;
}
-
-static int __devinit gpio_mdio_probe(struct of_device *ofdev,
- const struct of_device_id *match)
+static int __devinit __gpio_mdio_register_bus(struct of_device *ofdev,
+ const struct of_device_id *match)
{
struct device *dev = &ofdev->dev;
struct device_node *np = ofdev->node;
- struct device_node *gpio_np;
struct mii_bus *new_bus;
struct resource res;
struct gpio_priv *priv;
const unsigned int *prop;
- int err = 0;
int i;
- gpio_np = of_find_compatible_node(NULL, "gpio", "1682m-gpio");
-
- if (!gpio_np)
- return -ENODEV;
-
- err = of_address_to_resource(gpio_np, 0, &res);
- of_node_put(gpio_np);
-
- if (err)
- return -EINVAL;
-
- if (!gpio_regs)
- gpio_regs = ioremap(res.start, 0x100);
-
- if (!gpio_regs)
- return -EPERM;
-
priv = kzalloc(sizeof(struct gpio_priv), GFP_KERNEL);
- if (priv == NULL)
+ if (unlikely(priv == NULL))
return -ENOMEM;
new_bus = kzalloc(sizeof(struct mii_bus), GFP_KERNEL);
- if (new_bus == NULL)
- return -ENOMEM;
+ if (unlikely(new_bus == NULL))
+ goto free_priv;
new_bus->name = "pasemi gpio mdio bus",
new_bus->read = &gpio_mdio_read,
new_bus->write = &gpio_mdio_write,
new_bus->reset = &gpio_mdio_reset,
prop = of_get_property(np, "reg", NULL);
new_bus->id = *prop;
new_bus->priv = priv;
new_bus->phy_mask = 0;
new_bus->irq = kmalloc(sizeof(int)*PHY_MAX_ADDR, GFP_KERNEL);
+ if (unlikely(new_bus->irq == NULL))
+ goto free_new_bus;
+
for(i = 0; i < PHY_MAX_ADDR; ++i)
new_bus->irq[i] = irq_create_mapping(NULL, 10);
prop = of_get_property(np, "mdc-pin", NULL);
priv->mdc_pin = *prop;
prop = of_get_property(np, "mdio-pin", NULL);
priv->mdio_pin = *prop;
new_bus->dev = dev;
dev_set_drvdata(dev, new_bus);
err = mdiobus_register(new_bus);
- if (0 != err) {
+ if (unlikely(0 != err)) {
printk(KERN_ERR "%s: Cannot register as MDIO bus, err %d\n",
new_bus->name, err);
goto bus_register_fail;
}
return 0;
bus_register_fail:
+ kfree(new_bus->irq);
+free_new_bus:
kfree(new_bus);
+free_priv:
+ kfree(priv);
+
+ return -ENOMEM;
+}
+
+
+static int __devinit gpio_mdio_probe(struct of_device *ofdev,
+ const struct of_device_id *match)
+{
+ struct device_node *gpio_np;
+ int err;
+
+ gpio_np = of_find_compatible_node(NULL, "gpio", "1682m-gpio");
+
+ if (!gpio_np)
+ return -ENODEV;
+
+ err = of_address_to_resource(gpio_np, 0, &res);
+ of_node_put(gpio_np);
+
+ if (err)
+ return -EINVAL;
+
+ if (!gpio_regs) {
+
+ gpio_regs = ioremap(res.start, 0x100);
+ if (unlikely(!gpio_regs))
+ return -EPERM;
+
+ err = __gpio_mdio_register_bus(ofdev, match);
+ if (err < 0)
+ iounmap(gpio_regs);
+ } else
+ err = __gpio_mdio_register_bus(ofdev, match);
return err;
+
}
static int gpio_mdio_remove(struct of_device *dev)
{
struct mii_bus *bus = dev_get_drvdata(&dev->dev);
mdiobus_unregister(bus);
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