ACPICA: Fix for namespace lookup problem

Fixed a problem where objects of certain types (Device,
ThermalZone, Processor, PowerResource) can be not found if they
are declared and referenced from within the same control method

http://www.acpica.org/bugzilla/show_bug.cgi?id=341.

Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de>
Signed-off-by: Len Brown <len.brown@intel.com>

diff --git a/drivers/acpi/parser/psargs.c b/drivers/acpi/parser/psargs.c
index c2b9835c890b892269e47079cf69a94fc6b9fe1e..442880f5600ec77ea28ca1e6d6120b8e6e185924 100644 (file)
--- a/drivers/acpi/parser/psargs.c
+++ b/drivers/acpi/parser/psargs.c
@@ -230,12 +230,11 @@ acpi_ps_get_next_namepath(struct acpi_walk_state *walk_state,
                          struct acpi_parse_state *parser_state,
                          union acpi_parse_object *arg, u8 possible_method_call)
 {
+       acpi_status status;
        char *path;
        union acpi_parse_object *name_op;
-       acpi_status status;
        union acpi_operand_object *method_desc;
        struct acpi_namespace_node *node;
-       union acpi_generic_state scope_info;
 
        ACPI_FUNCTION_TRACE(ps_get_next_namepath);
 
@@ -249,25 +248,18 @@ acpi_ps_get_next_namepath(struct acpi_walk_state *walk_state,
                return_ACPI_STATUS(AE_OK);
        }
 
-       /* Setup search scope info */
-
-       scope_info.scope.node = NULL;
-       node = parser_state->start_node;
-       if (node) {
-               scope_info.scope.node = node;
-       }
-
        /*
-        * Lookup the name in the internal namespace. We don't want to add
-        * anything new to the namespace here, however, so we use MODE_EXECUTE.
+        * Lookup the name in the internal namespace, starting with the current
+        * scope. We don't want to add anything new to the namespace here,
+        * however, so we use MODE_EXECUTE.
         * Allow searching of the parent tree, but don't open a new scope -
         * we just want to lookup the object (must be mode EXECUTE to perform
         * the upsearch)
         */
-       status =
-           acpi_ns_lookup(&scope_info, path, ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE,
-                          ACPI_NS_SEARCH_PARENT | ACPI_NS_DONT_OPEN_SCOPE,
-                          NULL, &node);
+       status = acpi_ns_lookup(walk_state->scope_info, path,
+                               ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE,
+                               ACPI_NS_SEARCH_PARENT | ACPI_NS_DONT_OPEN_SCOPE,
+                               NULL, &node);
 
        /*
         * If this name is a control method invocation, we must