backlight: aat2870: use devm_backlight_device_register()

Use devm_backlight_device_register() to make cleanup paths simpler.
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/video/backlight/aat2870_bl.c

@@ -158,8 +158,9 @@ static int aat2870_bl_probe(struct platform_device *pdev)
 	memset(&props, 0, sizeof(struct backlight_properties));
 
 	props.type = BACKLIGHT_RAW;
-	bd = backlight_device_register("aat2870-backlight", &pdev->dev,
-				       aat2870_bl, &aat2870_bl_ops, &props);
+	bd = devm_backlight_device_register(&pdev->dev, "aat2870-backlight",
+					&pdev->dev, aat2870_bl, &aat2870_bl_ops,
+					&props);
 	if (IS_ERR(bd)) {
 		dev_err(&pdev->dev,
 			"Failed allocate memory for backlight device\n");
@@ -194,13 +195,11 @@ static int aat2870_bl_probe(struct platform_device *pdev)
 	ret = aat2870_bl_update_status(bd);
 	if (ret < 0) {
 		dev_err(&pdev->dev, "Failed to initialize\n");
-		goto out_bl_dev_unregister;
+		return ret;
 	}
 
 	return 0;
 
-out_bl_dev_unregister:
-	backlight_device_unregister(bd);
 out:
 	return ret;
 }
@@ -214,8 +213,6 @@ static int aat2870_bl_remove(struct platform_device *pdev)
 	bd->props.brightness = 0;
 	backlight_update_status(bd);
 
-	backlight_device_unregister(bd);
-
 	return 0;
 }