[PATCH v1 2/4] devres: Add devm_is_action_added() helper

Andy Shevchenko
2025-02-20T14:16:50Z

In some code we would like to know if the action in device managed resources
was added by devm_add_action() family of calls. Introduce a helper for that.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
drivers/base/devres.c | 11 +++++++++++
include/linux/device/devres.h | 2 ++
2 files changed, 13 insertions(+)

diff --git a/drivers/base/devres.c b/drivers/base/devres.c
index 93e7779ef21e..7c2babfa9396 100644
--- a/drivers/base/devres.c
+++ b/drivers/base/devres.c
@@ -749,6 +749,17 @@ int __devm_add_action(struct device *dev, void (*action)(void *), void *data, co
}
EXPORT_SYMBOL_GPL(__devm_add_action);

+bool devm_is_action_added(struct device *dev, void (*action)(void *), void *data)
+{
+ struct action_devres devres = {
+ .data = data,
+ .action = action,
+ };
+
+ return devres_find(dev, devm_action_release, devm_action_match, &devres);
+}
+EXPORT_SYMBOL_GPL(devm_is_action_added);
+
/**
* devm_remove_action_nowarn() - removes previously added custom action
* @dev: Device that owns the action
diff --git a/include/linux/device/devres.h b/include/linux/device/devres.h
index 9cd1787ef28e..ae696d10faff 100644
--- a/include/linux/device/devres.h
+++ b/include/linux/device/devres.h
@@ -165,4 +165,6 @@ static inline int __devm_add_action_or_reset(struct device *dev, void (*action)(
#define devm_add_action_or_reset(dev, action, data) \
__devm_add_action_or_reset(dev, action, data, #action)

+bool devm_is_action_added(struct device *dev, void (*action)(void *), void *data);
+
#endif /* _DEVICE_DEVRES_H_ */
--
2.45.1.3035.g276e886db78b