extcon: palmas: 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: NSangjung Woo <sangjung.woo@samsung.com>
Signed-off-by: NChanwoo Choi <cw00.choi@samsung.com>

drivers/extcon/extcon-palmas.c

@@ -192,7 +192,7 @@ static int palmas_usb_probe(struct platform_device *pdev)
 	palmas_usb->edev.name = kstrdup(node->name, GFP_KERNEL);
 	palmas_usb->edev.mutually_exclusive = mutually_exclusive;
 
-	status = extcon_dev_register(&palmas_usb->edev);
+	status = devm_extcon_dev_register(&pdev->dev, &palmas_usb->edev);
 	if (status) {
 		dev_err(&pdev->dev, "failed to register extcon device\n");
 		kfree(palmas_usb->edev.name);
@@ -209,7 +209,8 @@ static int palmas_usb_probe(struct platform_device *pdev)
 		if (status < 0) {
 			dev_err(&pdev->dev, "can't get IRQ %d, err %d\n",
 					palmas_usb->id_irq, status);
-			goto fail_extcon;
+			kfree(palmas_usb->edev.name);
+			return status;
 		}
 	}
 
@@ -223,26 +224,20 @@ static int palmas_usb_probe(struct platform_device *pdev)
 		if (status < 0) {
 			dev_err(&pdev->dev, "can't get IRQ %d, err %d\n",
 					palmas_usb->vbus_irq, status);
-			goto fail_extcon;
+			kfree(palmas_usb->edev.name);
+			return status;
 		}
 	}
 
 	palmas_enable_irq(palmas_usb);
 	device_set_wakeup_capable(&pdev->dev, true);
 	return 0;
-
-fail_extcon:
-	extcon_dev_unregister(&palmas_usb->edev);
-	kfree(palmas_usb->edev.name);
-
-	return status;
 }
 
 static int palmas_usb_remove(struct platform_device *pdev)
 {
 	struct palmas_usb *palmas_usb = platform_get_drvdata(pdev);
 
-	extcon_dev_unregister(&palmas_usb->edev);
 	kfree(palmas_usb->edev.name);
 
 	return 0;