[PATCH v6 5/5] device property: Constify fwnode APIs that uses fwnode_get_next_parent()

From: Andy Shevchenko
Date: Fri Apr 08 2022 - 14:49:49 EST


Due to fwnode_get_next_parent() used to be called against the parameters
of some of fwnode APIs those parameters have no const qualifier. However,
after switching to fwnode_for_each_parent_node() API now it's possible to
constify the parameters. Do it for good.

The affected functions are:

fwnode_get_next_parent_dev()
fwnode_get_nth_parent()
fwnode_is_ancestor_of()

Signed-off-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
Reviewed-by: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>
---
v6: added tag (Sakari), since previous patch no warnings anymore (LKP)
drivers/base/property.c | 7 +++----
include/linux/property.h | 9 ++++-----
2 files changed, 7 insertions(+), 9 deletions(-)

diff --git a/drivers/base/property.c b/drivers/base/property.c
index 1ad4b37cd312..f289f582209c 100644
--- a/drivers/base/property.c
+++ b/drivers/base/property.c
@@ -594,7 +594,7 @@ EXPORT_SYMBOL_GPL(fwnode_get_next_parent);
* The caller of this function is expected to call put_device() on the returned
* device when they are done.
*/
-struct device *fwnode_get_next_parent_dev(struct fwnode_handle *fwnode)
+struct device *fwnode_get_next_parent_dev(const struct fwnode_handle *fwnode)
{
struct fwnode_handle *parent;
struct device *dev;
@@ -639,8 +639,7 @@ EXPORT_SYMBOL_GPL(fwnode_count_parents);
* The caller is responsible for calling fwnode_handle_put() for the returned
* node.
*/
-struct fwnode_handle *fwnode_get_nth_parent(struct fwnode_handle *fwnode,
- unsigned int depth)
+struct fwnode_handle *fwnode_get_nth_parent(const struct fwnode_handle *fwnode, unsigned int depth)
{
struct fwnode_handle *parent;

@@ -664,7 +663,7 @@ EXPORT_SYMBOL_GPL(fwnode_get_nth_parent);
*
* Returns true if @ancestor is an ancestor of @child. Otherwise, returns false.
*/
-bool fwnode_is_ancestor_of(struct fwnode_handle *ancestor, struct fwnode_handle *child)
+bool fwnode_is_ancestor_of(const struct fwnode_handle *ancestor, const struct fwnode_handle *child)
{
struct fwnode_handle *parent;

diff --git a/include/linux/property.h b/include/linux/property.h
index c631ee7fd161..e3390401dd63 100644
--- a/include/linux/property.h
+++ b/include/linux/property.h
@@ -91,11 +91,10 @@ struct fwnode_handle *fwnode_get_next_parent(struct fwnode_handle *fwnode);
for (parent = fwnode_get_parent(fwnode); parent; \
parent = fwnode_get_next_parent(parent))

-struct device *fwnode_get_next_parent_dev(struct fwnode_handle *fwnode);
-unsigned int fwnode_count_parents(const struct fwnode_handle *fwn);
-struct fwnode_handle *fwnode_get_nth_parent(struct fwnode_handle *fwn,
- unsigned int depth);
-bool fwnode_is_ancestor_of(struct fwnode_handle *ancestor, struct fwnode_handle *child);
+struct device *fwnode_get_next_parent_dev(const struct fwnode_handle *fwnode);
+unsigned int fwnode_count_parents(const struct fwnode_handle *fwnode);
+struct fwnode_handle *fwnode_get_nth_parent(const struct fwnode_handle *fwnode, unsigned int depth);
+bool fwnode_is_ancestor_of(const struct fwnode_handle *ancestor, const struct fwnode_handle *child);
struct fwnode_handle *fwnode_get_next_child_node(
const struct fwnode_handle *fwnode, struct fwnode_handle *child);
struct fwnode_handle *fwnode_get_next_available_child_node(
--
2.35.1