[ACPI] ACPICA 20051216

Implemented optional support to allow unresolved names
within ASL Package objects. A null object is inserted in
the package when a named reference cannot be located in
the current namespace. Enabled via the interpreter slack
flag which Linux has enabled by default (acpi=strict
to disable slack).  This should eliminate AE_NOT_FOUND
exceptions seen on machines that contain such code.

Implemented an optimization to the initialization
sequence that can improve boot time. During ACPI device
initialization, the _STA method is now run if and only
if the _INI method exists. The _STA method is used to
determine if the device is present; An _INI can only be
run if _STA returns present, but it is a waste of time to
run the _STA method if the _INI does not exist. (Prototype
and assistance from Dong Wei)

Implemented use of the C99 uintptr_t for the pointer
casting macros if it is available in the current
compiler. Otherwise, the default (void *) cast is used
as before.

Fixed some possible memory leaks found within the
execution path of the Break, Continue, If, and CreateField
operators. (Valery Podrezov)

Fixed a problem introduced in the 20051202 release where
an exception is generated during method execution if a
control method attempts to declare another method.

Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>

1 files changed, 62 insertions, 3 deletions

diff --git a/drivers/acpi/dispatcher/dsmethod.c b/drivers/acpi/dispatcher/dsmethod.c
index 58ad00b31ee9..e7ce86b8d954 100644
--- a/drivers/acpi/dispatcher/dsmethod.c
+++ b/drivers/acpi/dispatcher/dsmethod.c
@@ -47,12 +47,70 @@
 #include <acpi/acdispat.h>
 #include <acpi/acinterp.h>
 #include <acpi/acnamesp.h>
+#include <acpi/acdisasm.h>
 
 #define _COMPONENT          ACPI_DISPATCHER
 ACPI_MODULE_NAME("dsmethod")
 
 /*******************************************************************************
  *
+ * FUNCTION:    acpi_ds_method_error
+ *
+ * PARAMETERS:  Status          - Execution status
+ *              walk_state      - Current state
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Called on method error. Invoke the global exception handler if
+ *              present, dump the method data if the disassembler is configured
+ *
+ *              Note: Allows the exception handler to change the status code
+ *
+ ******************************************************************************/
+acpi_status
+acpi_ds_method_error(acpi_status status, struct acpi_walk_state *walk_state)
+{
+        ACPI_FUNCTION_ENTRY();
+
+        /* Ignore AE_OK and control exception codes */
+
+        if (ACPI_SUCCESS(status) || (status & AE_CODE_CONTROL)) {
+                return (status);
+        }
+
+        /* Invoke the global exception handler */
+
+        if (acpi_gbl_exception_handler) {
+                /* Exit the interpreter, allow handler to execute methods */
+
+                acpi_ex_exit_interpreter();
+
+                /*
+                 * Handler can map the exception code to anything it wants, including
+                 * AE_OK, in which case the executing method will not be aborted.
+                 */
+                status = acpi_gbl_exception_handler(status,
+                                                    walk_state->method_node ?
+                                                    walk_state->method_node->
+                                                    name.integer : 0,
+                                                    walk_state->opcode,
+                                                    walk_state->aml_offset,
+                                                    NULL);
+                (void)acpi_ex_enter_interpreter();
+        }
+#ifdef ACPI_DISASSEMBLER
+        if (ACPI_FAILURE(status)) {
+                /* Display method locals/args if disassembler is present */
+
+                acpi_dm_dump_method_info(status, walk_state, walk_state->op);
+        }
+#endif
+
+        return (status);
+}
+
+/*******************************************************************************
+ *
  * FUNCTION:    acpi_ds_begin_method_execution
  *
  * PARAMETERS:  method_node         - Node of the method
@@ -66,10 +124,11 @@ ACPI_MODULE_NAME("dsmethod")
  *              for clearance to execute.
  *
  ******************************************************************************/
+
 acpi_status
-acpi_ds_begin_method_execution(struct acpi_namespace_node *method_node,
-                               union acpi_operand_object *obj_desc,
-                               struct acpi_namespace_node *calling_method_node)
+acpi_ds_begin_method_execution(struct acpi_namespace_node * method_node,
+                               union acpi_operand_object * obj_desc,
+                               struct acpi_namespace_node * calling_method_node)
 {
         acpi_status status = AE_OK;