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software node: allow passing reference args to PROPERTY_ENTRY_REF()

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When dynamically creating software nodes and properties for subsequent
use with software_node_register() current implementation of
PROPERTY_ENTRY_REF() is not suitable because it creates a temporary
instance of struct software_node_ref_args on stack which will later
disappear, and software_node_register() only does shallow copy of
properties.

Fix this by allowing to pass address of reference arguments structure
directly into PROPERTY_ENTRY_REF(), so that caller can manage lifetime
of the object properly.

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://patch.msgid.link/aiTo4dvKu8pyimHA@google.com
Signed-off-by: Danilo Krummrich <dakr@kernel.org>
This commit is contained in:
Dmitry Torokhov 2026-06-06 20:51:29 -07:00 committed by Danilo Krummrich
parent a7a7dc5c46
commit fe221742e3
1 changed files with 7 additions and 1 deletions
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8
include/linux/property.h
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@ -471,12 +471,18 @@ struct property_entry {
#define PROPERTY_ENTRY_STRING(_name_, _val_) \
__PROPERTY_ENTRY_ELEMENT(_name_, str, STRING, _val_)
#define __PROPERTY_ENTRY_REF_ARGS(_ref_, ...) \
_Generic(_ref_, \
const struct software_node_ref_args *: _ref_, \
struct software_node_ref_args *: _ref_, \
default: &SOFTWARE_NODE_REFERENCE(_ref_, ##__VA_ARGS__))
#define PROPERTY_ENTRY_REF(_name_, _ref_, ...) \
(struct property_entry) { \
.name = _name_, \
.length = sizeof(struct software_node_ref_args), \
.type = DEV_PROP_REF, \
{ .pointer = &SOFTWARE_NODE_REFERENCE(_ref_, ##__VA_ARGS__), }, \
{ .pointer = __PROPERTY_ENTRY_REF_ARGS(_ref_, ##__VA_ARGS__) }, \
}
#define PROPERTY_ENTRY_BOOL(_name_) \