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path: root/drivers/acpi/namespace/nsutils.c
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Diffstat (limited to 'drivers/acpi/namespace/nsutils.c')
-rw-r--r--drivers/acpi/namespace/nsutils.c63
1 files changed, 31 insertions, 32 deletions
diff --git a/drivers/acpi/namespace/nsutils.c b/drivers/acpi/namespace/nsutils.c
index d1d55032b455..aa4e799d9a8c 100644
--- a/drivers/acpi/namespace/nsutils.c
+++ b/drivers/acpi/namespace/nsutils.c
@@ -142,8 +142,9 @@ acpi_ns_report_method_error(char *module_name,
acpi_os_printf("ACPI Error (%s-%04d): ", module_name, line_number);
if (path) {
- status = acpi_ns_get_node_by_path(path, prefix_node,
- ACPI_NS_NO_UPSEARCH, &node);
+ status =
+ acpi_ns_get_node(prefix_node, path, ACPI_NS_NO_UPSEARCH,
+ &node);
if (ACPI_FAILURE(status)) {
acpi_os_printf("[Could not get node by pathname]");
}
@@ -685,13 +686,9 @@ struct acpi_namespace_node *acpi_ns_map_handle_to_node(acpi_handle handle)
ACPI_FUNCTION_ENTRY();
/*
- * Simple implementation.
+ * Simple implementation
*/
- if (!handle) {
- return (NULL);
- }
-
- if (handle == ACPI_ROOT_OBJECT) {
+ if ((!handle) || (handle == ACPI_ROOT_OBJECT)) {
return (acpi_gbl_root_node);
}
@@ -701,7 +698,7 @@ struct acpi_namespace_node *acpi_ns_map_handle_to_node(acpi_handle handle)
return (NULL);
}
- return ((struct acpi_namespace_node *)handle);
+ return (ACPI_CAST_PTR(struct acpi_namespace_node, handle));
}
/*******************************************************************************
@@ -811,12 +808,12 @@ u32 acpi_ns_opens_scope(acpi_object_type type)
/*******************************************************************************
*
- * FUNCTION: acpi_ns_get_node_by_path
+ * FUNCTION: acpi_ns_get_node
*
* PARAMETERS: *Pathname - Name to be found, in external (ASL) format. The
* \ (backslash) and ^ (carat) prefixes, and the
* . (period) to separate segments are supported.
- * start_node - Root of subtree to be searched, or NS_ALL for the
+ * prefix_node - Root of subtree to be searched, or NS_ALL for the
* root of the name space. If Name is fully
* qualified (first s8 is '\'), the passed value
* of Scope will not be accessed.
@@ -832,24 +829,29 @@ u32 acpi_ns_opens_scope(acpi_object_type type)
******************************************************************************/
acpi_status
-acpi_ns_get_node_by_path(char *pathname,
- struct acpi_namespace_node *start_node,
- u32 flags, struct acpi_namespace_node **return_node)
+acpi_ns_get_node(struct acpi_namespace_node *prefix_node,
+ char *pathname,
+ u32 flags, struct acpi_namespace_node **return_node)
{
union acpi_generic_state scope_info;
acpi_status status;
- char *internal_path = NULL;
+ char *internal_path;
- ACPI_FUNCTION_TRACE_PTR(ns_get_node_by_path, pathname);
+ ACPI_FUNCTION_TRACE_PTR(ns_get_node, pathname);
- if (pathname) {
+ if (!pathname) {
+ *return_node = prefix_node;
+ if (!prefix_node) {
+ *return_node = acpi_gbl_root_node;
+ }
+ return_ACPI_STATUS(AE_OK);
+ }
- /* Convert path to internal representation */
+ /* Convert path to internal representation */
- status = acpi_ns_internalize_name(pathname, &internal_path);
- if (ACPI_FAILURE(status)) {
- return_ACPI_STATUS(status);
- }
+ status = acpi_ns_internalize_name(pathname, &internal_path);
+ if (ACPI_FAILURE(status)) {
+ return_ACPI_STATUS(status);
}
/* Must lock namespace during lookup */
@@ -861,26 +863,23 @@ acpi_ns_get_node_by_path(char *pathname,
/* Setup lookup scope (search starting point) */
- scope_info.scope.node = start_node;
+ scope_info.scope.node = prefix_node;
/* Lookup the name in the namespace */
- status = acpi_ns_lookup(&scope_info, internal_path,
- ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE,
- (flags | ACPI_NS_DONT_OPEN_SCOPE),
- NULL, return_node);
+ status = acpi_ns_lookup(&scope_info, internal_path, ACPI_TYPE_ANY,
+ ACPI_IMODE_EXECUTE,
+ (flags | ACPI_NS_DONT_OPEN_SCOPE), NULL,
+ return_node);
if (ACPI_FAILURE(status)) {
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "%s, %s\n",
- internal_path,
- acpi_format_exception(status)));
+ pathname, acpi_format_exception(status)));
}
(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
cleanup:
- if (internal_path) {
- ACPI_FREE(internal_path);
- }
+ ACPI_FREE(internal_path);
return_ACPI_STATUS(status);
}