devres: No need to call remove_nodes() when there none present

If a list of devres nodes is empty, no need to call remove_nodes().

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20210517122946.53161-3-andriy.shevchenko@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/base/devres.c

@@ -526,6 +526,10 @@ int devres_release_all(struct device *dev)
 	if (WARN_ON(dev->devres_head.next == NULL))
 		return -ENODEV;
 
+	/* Nothing to release if list is empty */
+	if (list_empty(&dev->devres_head))
+		return 0;
+
 	spin_lock_irqsave(&dev->devres_lock, flags);
 	cnt = remove_nodes(dev, dev->devres_head.next, &dev->devres_head, &todo);
 	spin_unlock_irqrestore(&dev->devres_lock, flags);