extcon: gpio: Use devm_extcon_dev_register()

Use the resource-managed extcon device register function (i.e.
devm_extcon_dev_register()) instead of extcon_dev_register(). If extcon device
is attached with this function, that extcon device is automatically unregistered
on driver detach. That reduces tiresome managing code.

Signed-off-by: Sangjung Woo <sangjung.woo@samsung.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>

diff --git a/drivers/extcon/extcon-gpio.c b/drivers/extcon/extcon-gpio.c
index 13d5222..43af34c 100644 (file)
--- a/drivers/extcon/extcon-gpio.c
+++ b/drivers/extcon/extcon-gpio.c
@@ -121,34 +121,27 @@ static int gpio_extcon_probe(struct platform_device *pdev)
                                msecs_to_jiffies(pdata->debounce);
        }
 
-       ret = extcon_dev_register(&extcon_data->edev);
+       ret = devm_extcon_dev_register(&pdev->dev, &extcon_data->edev);
        if (ret < 0)
                return ret;
 
        INIT_DELAYED_WORK(&extcon_data->work, gpio_extcon_work);
 
        extcon_data->irq = gpio_to_irq(extcon_data->gpio);
-       if (extcon_data->irq < 0) {
-               ret = extcon_data->irq;
-               goto err;
-       }
+       if (extcon_data->irq < 0)
+               return extcon_data->irq;
 
        ret = request_any_context_irq(extcon_data->irq, gpio_irq_handler,
                                      pdata->irq_flags, pdev->name,
                                      extcon_data);
        if (ret < 0)
-               goto err;
+               return ret;
 
        platform_set_drvdata(pdev, extcon_data);
        /* Perform initial detection */
        gpio_extcon_work(&extcon_data->work.work);
 
        return 0;
-
-err:
-       extcon_dev_unregister(&extcon_data->edev);
-
-       return ret;
 }
 
 static int gpio_extcon_remove(struct platform_device *pdev)
@@ -157,7 +150,6 @@ static int gpio_extcon_remove(struct platform_device *pdev)
 
        cancel_delayed_work_sync(&extcon_data->work);
        free_irq(extcon_data->irq, extcon_data);
-       extcon_dev_unregister(&extcon_data->edev);
 
        return 0;
 }