net: mdio-gpio: Use devm_ functions where possible

This simplifies error path and deinit/removal functions.

Signed-off-by: Guenter Roeck <[e-mail]>
Tested-by: Chris Healy <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

drivers/net/phy/mdio-gpio.c

···
 	struct mdio_gpio_info *bitbang;
 	int i;
 
-	bitbang = kzalloc(sizeof(*bitbang), GFP_KERNEL);
+	bitbang = devm_kzalloc(dev, sizeof(*bitbang), GFP_KERNEL);
 	if (!bitbang)
 		goto out;
 
···
 
 	new_bus = alloc_mdio_bitbang(&bitbang->ctrl);
 	if (!new_bus)
-		goto out_free_bitbang;
+		goto out;
 
 	new_bus->name = "GPIO Bitbanged MDIO",
 
···
 
 	snprintf(new_bus->id, MII_BUS_ID_SIZE, "gpio-%x", bus_id);
 
-	if (gpio_request(bitbang->mdc, "mdc"))
+	if (devm_gpio_request(dev, bitbang->mdc, "mdc"))
 		goto out_free_bus;
 
-	if (gpio_request(bitbang->mdio, "mdio"))
-		goto out_free_mdc;
+	if (devm_gpio_request(dev, bitbang->mdio, "mdio"))
+		goto out_free_bus;
 
 	gpio_direction_output(bitbang->mdc, 0);
 
···
 
 	return new_bus;
 
-out_free_mdc:
-	gpio_free(bitbang->mdc);
 out_free_bus:
 	free_mdio_bitbang(new_bus);
-out_free_bitbang:
-	kfree(bitbang);
 out:
 	return NULL;
 }
···
 static void mdio_gpio_bus_deinit(struct device *dev)
 {
 	struct mii_bus *bus = dev_get_drvdata(dev);
-	struct mdio_gpio_info *bitbang = bus->priv;
 
-	dev_set_drvdata(dev, NULL);
-	gpio_free(bitbang->mdio);
-	gpio_free(bitbang->mdc);
 	free_mdio_bitbang(bus);
-	kfree(bitbang);
 }
 
 static void mdio_gpio_bus_destroy(struct device *dev)