1 files changed, 36 insertions, 10 deletions

diff --git a/drivers/acpi/namespace/nsparse.c b/drivers/acpi/namespace/nsparse.c
index 155505a4ef69..2e224796d56f 100644
--- a/drivers/acpi/namespace/nsparse.c
+++ b/drivers/acpi/namespace/nsparse.c
@@ -45,6 +45,7 @@
 #include <acpi/acnamesp.h>
 #include <acpi/acparser.h>
 #include <acpi/acdispat.h>
+#include <acpi/actables.h>
 
 #define _COMPONENT          ACPI_NAMESPACE
 ACPI_MODULE_NAME("nsparse")
@@ -62,14 +63,24 @@ ACPI_MODULE_NAME("nsparse")
  *
  ******************************************************************************/
 acpi_status
-acpi_ns_one_complete_parse(u8 pass_number, struct acpi_table_desc *table_desc)
+acpi_ns_one_complete_parse(acpi_native_uint pass_number,
+                           acpi_native_uint table_index)
 {
         union acpi_parse_object *parse_root;
         acpi_status status;
+        acpi_native_uint aml_length;
+        u8 *aml_start;
         struct acpi_walk_state *walk_state;
+        struct acpi_table_header *table;
+        acpi_owner_id owner_id;
 
         ACPI_FUNCTION_TRACE(ns_one_complete_parse);
 
+        status = acpi_tb_get_owner_id(table_index, &owner_id);
+        if (ACPI_FAILURE(status)) {
+                return_ACPI_STATUS(status);
+        }
+
         /* Create and init a Root Node */
 
         parse_root = acpi_ps_create_scope_op();
@@ -79,19 +90,34 @@ acpi_ns_one_complete_parse(u8 pass_number, struct acpi_table_desc *table_desc)
 
         /* Create and initialize a new walk state */
 
-        walk_state = acpi_ds_create_walk_state(table_desc->owner_id,
-                                               NULL, NULL, NULL);
+        walk_state = acpi_ds_create_walk_state(owner_id, NULL, NULL, NULL);
         if (!walk_state) {
                 acpi_ps_free_op(parse_root);
                 return_ACPI_STATUS(AE_NO_MEMORY);
         }
 
-        status = acpi_ds_init_aml_walk(walk_state, parse_root, NULL,
-                                       table_desc->aml_start,
-                                       table_desc->aml_length, NULL,
-                                       pass_number);
+        status = acpi_get_table_by_index(table_index, &table);
+        if (ACPI_FAILURE(status)) {
+                acpi_ds_delete_walk_state(walk_state);
+                acpi_ps_free_op(parse_root);
+                return_ACPI_STATUS(status);
+        }
+
+        /* Table must consist of at least a complete header */
+
+        if (table->length < sizeof(struct acpi_table_header)) {
+                status = AE_BAD_HEADER;
+        } else {
+                aml_start = (u8 *) table + sizeof(struct acpi_table_header);
+                aml_length = table->length - sizeof(struct acpi_table_header);
+                status = acpi_ds_init_aml_walk(walk_state, parse_root, NULL,
+                                               aml_start, aml_length, NULL,
+                                               (u8) pass_number);
+        }
+
         if (ACPI_FAILURE(status)) {
                 acpi_ds_delete_walk_state(walk_state);
+                acpi_ps_delete_parse_tree(parse_root);
                 return_ACPI_STATUS(status);
         }
 
@@ -119,7 +145,7 @@ acpi_ns_one_complete_parse(u8 pass_number, struct acpi_table_desc *table_desc)
  ******************************************************************************/
 
 acpi_status
-acpi_ns_parse_table(struct acpi_table_desc *table_desc,
+acpi_ns_parse_table(acpi_native_uint table_index,
                     struct acpi_namespace_node *start_node)
 {
         acpi_status status;
@@ -137,7 +163,7 @@ acpi_ns_parse_table(struct acpi_table_desc *table_desc,
          * performs another complete parse of the AML..
          */
         ACPI_DEBUG_PRINT((ACPI_DB_PARSE, "**** Start pass 1\n"));
-        status = acpi_ns_one_complete_parse(1, table_desc);
+        status = acpi_ns_one_complete_parse(1, table_index);
         if (ACPI_FAILURE(status)) {
                 return_ACPI_STATUS(status);
         }
@@ -152,7 +178,7 @@ acpi_ns_parse_table(struct acpi_table_desc *table_desc,
          * parse objects are all cached.
          */
         ACPI_DEBUG_PRINT((ACPI_DB_PARSE, "**** Start pass 2\n"));
-        status = acpi_ns_one_complete_parse(2, table_desc);
+        status = acpi_ns_one_complete_parse(2, table_index);
         if (ACPI_FAILURE(status)) {
                 return_ACPI_STATUS(status);
         }