bl = backlight_device_register(ch->cfg.bl_info.name, parent, ch,
&sh_mobile_lcdc_bl_ops, NULL);
- if (!bl) {
- dev_err(parent, "unable to register backlight device\n");
+ if (IS_ERR(bl)) {
+ dev_err(parent, "unable to register backlight device: %ld\n",
+ PTR_ERR(bl));
return NULL;
}