leds: triggers: Check return value of kobject_uevent_env()

Log error message if kobject_uevent_env() fails in led_trigger_set().

Signed-off-by: Jacek Anaszewski <[e-mail]>
Acked-by: Greg Kroah-Hartman <[e-mail]>

drivers/leds/led-triggers.c

···
 	if (event) {
 		envp[0] = event;
 		envp[1] = NULL;
-		kobject_uevent_env(&led_cdev->dev->kobj, KOBJ_CHANGE, envp);
+		if (kobject_uevent_env(&led_cdev->dev->kobj, KOBJ_CHANGE, envp))
+			dev_err(led_cdev->dev,
+				"%s: Error sending uevent\n", __func__);
 		kfree(event);
 	}
 }