From: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Date: Tue, 9 Jun 2020 13:22:39 +0000 (+0300)
Subject: ACPI: property: use cached name in acpi_fwnode_get_named_child_node()
X-Git-Tag: v5.10.7~1984^2~1^7
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=cbdd865a94aee4f21e7be330e622d9a8b5ad2db8;p=platform%2Fkernel%2Flinux-rpi.git

ACPI: property: use cached name in acpi_fwnode_get_named_child_node()

There is no need to re-evaluate the object name.

Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---

diff --git a/drivers/acpi/property.c b/drivers/acpi/property.c
index e601c45..6941062 100644
--- a/drivers/acpi/property.c
+++ b/drivers/acpi/property.c
@@ -606,13 +606,7 @@ 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;
-
-	path.length = sizeof(name);
-	path.pointer = name;
 
 	fwnode_for_each_child_node(fwnode, child) {
 		if (is_acpi_data_node(child)) {
@@ -621,12 +615,8 @@ acpi_fwnode_get_named_child_node(const struct fwnode_handle *fwnode,
 			continue;
 		}
 
-		status = acpi_get_name(ACPI_HANDLE_FWNODE(child),
-				       ACPI_SINGLE_NAME, &path);
-		if (ACPI_FAILURE(status))
-			break;
-
-		if (!strncmp(name, childname, ACPI_NAMESEG_SIZE))
+		if (!strncmp(acpi_device_bid(to_acpi_device_node(child)),
+			     childname, ACPI_NAMESEG_SIZE))
 			return child;
 	}