backlight: generic_bl: use devm_backlight_device_register()

Use devm_backlight_device_register() to make cleanup paths simpler.

Signed-off-by: Jingoo Han <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

drivers/video/backlight/generic_bl.c

···
 	memset(&props, 0, sizeof(struct backlight_properties));
 	props.type = BACKLIGHT_RAW;
 	props.max_brightness = machinfo->max_intensity;
-	bd = backlight_device_register(name, &pdev->dev, NULL, &genericbl_ops,
-				       &props);
+	bd = devm_backlight_device_register(&pdev->dev, name, &pdev->dev,
+					NULL, &genericbl_ops, &props);
 	if (IS_ERR(bd))
 		return PTR_ERR(bd);
 
···
 	bd->props.power = 0;
 	bd->props.brightness = 0;
 	backlight_update_status(bd);
-
-	backlight_device_unregister(bd);
 
 	dev_info(&pdev->dev, "Generic Backlight Driver Unloaded\n");
 	return 0;