[PATCH v4 3/4] devres: No need to call remove_nodes() when there none present

Andy Shevchenko
2021-05-17T12:29:36Z

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

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
v4: rebased on top of v5.13-rc2

drivers/base/devres.c | 4 ++++
1 file changed, 4 insertions(+)

diff --git a/drivers/base/devres.c b/drivers/base/devres.c
index db1f3137fc81..dee48858663f 100644
--- 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);
--
2.30.2