[PATCH 05/11] ACPI / property: Don't limit named child node matching to data nodes

Heikki Krogerus
2019-04-03T16:45:31Z

There is no reason why we should limit the use of
fwnode_get_named_child_node() to data nodes only.

Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
---
drivers/acpi/property.c | 26 ++++++++++++++++++++------
1 file changed, 20 insertions(+), 6 deletions(-)

diff --git a/drivers/acpi/property.c b/drivers/acpi/property.c
index 77abe0ec4043..c3fb52c387a6 100644
--- a/drivers/acpi/property.c
+++ b/drivers/acpi/property.c
@@ -602,15 +602,29 @@ static struct fwnode_handle *
acpi_fwnode_get_named_child_node(const struct fwnode_handle *fwnode,
const char *childname)
{
+ char name[ACPI_PATH_SEGMENT_LENGTH];
struct fwnode_handle *child;
+ struct acpi_buffer path;
+ acpi_status status;

- /*
- * Find first matching named child node of this fwnode.
- * For ACPI this will be a data only sub-node.
- */
- fwnode_for_each_child_node(fwnode, child)
- if (acpi_data_node_match(child, childname))
+ path.length = sizeof(name);
+ path.pointer = name;
+
+ fwnode_for_each_child_node(fwnode, child) {
+ if (is_acpi_data_node(child)) {
+ if (acpi_data_node_match(child, childname))
+ return child;
+ continue;
+ }
+
+ status = acpi_get_name(ACPI_HANDLE_FWNODE(child),
+ ACPI_SINGLE_NAME, &path);
+ if (ACPI_FAILURE(status))
+ break;
+
+ if (!strncmp(name, childname, ACPI_NAME_SIZE))
return child;
+ }

return NULL;
}
--
2.20.1