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>

diff --git a/drivers/base/devres.c b/drivers/base/devres.c
index db1f3137fc819c4e7ab35da033d69ae8d59e5ee4..dee48858663f018b5c844cc5e29276a1b818ef58 100644 (file)
--- a/drivers/base/devres.c
+++ b/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);