Merge with git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git

1 files changed, 221 insertions, 139 deletions

diff --git a/drivers/acpi/dispatcher/dsmethod.c b/drivers/acpi/dispatcher/dsmethod.c
index 36c1ca0b9adb..c475546535b6 100644
--- a/drivers/acpi/dispatcher/dsmethod.c
+++ b/drivers/acpi/dispatcher/dsmethod.c
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2005, R. Byron Moore
+ * Copyright (C) 2000 - 2006, R. Byron Moore
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -47,135 +47,66 @@
 #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_parse_method
+ * FUNCTION:    acpi_ds_method_error
  *
- * PARAMETERS:  Node        - Method node
+ * PARAMETERS:  Status          - Execution status
+ *              walk_state      - Current state
  *
  * RETURN:      Status
  *
- * DESCRIPTION: Parse the AML that is associated with the method.
+ * DESCRIPTION: Called on method error. Invoke the global exception handler if
+ *              present, dump the method data if the disassembler is configured
  *
- * MUTEX:       Assumes parser is locked
+ *              Note: Allows the exception handler to change the status code
  *
  ******************************************************************************/
-acpi_status acpi_ds_parse_method(struct acpi_namespace_node *node)
+acpi_status
+acpi_ds_method_error(acpi_status status, struct acpi_walk_state *walk_state)
 {
-        acpi_status status;
-        union acpi_operand_object *obj_desc;
-        union acpi_parse_object *op;
-        struct acpi_walk_state *walk_state;
-
-        ACPI_FUNCTION_TRACE_PTR("ds_parse_method", node);
+        ACPI_FUNCTION_ENTRY();
 
-        /* Parameter Validation */
+        /* Ignore AE_OK and control exception codes */
 
-        if (!node) {
-                return_ACPI_STATUS(AE_NULL_ENTRY);
+        if (ACPI_SUCCESS(status) || (status & AE_CODE_CONTROL)) {
+                return (status);
         }
 
-        ACPI_DEBUG_PRINT((ACPI_DB_PARSE,
-                          "**** Parsing [%4.4s] **** named_obj=%p\n",
-                          acpi_ut_get_node_name(node), node));
-
-        /* Extract the method object from the method Node */
+        /* Invoke the global exception handler */
 
-        obj_desc = acpi_ns_get_attached_object(node);
-        if (!obj_desc) {
-                return_ACPI_STATUS(AE_NULL_OBJECT);
-        }
+        if (acpi_gbl_exception_handler) {
+                /* Exit the interpreter, allow handler to execute methods */
 
-        /* Create a mutex for the method if there is a concurrency limit */
+                acpi_ex_exit_interpreter();
 
-        if ((obj_desc->method.concurrency != ACPI_INFINITE_CONCURRENCY) &&
-            (!obj_desc->method.semaphore)) {
-                status = acpi_os_create_semaphore(obj_desc->method.concurrency,
-                                                  obj_desc->method.concurrency,
-                                                  &obj_desc->method.semaphore);
-                if (ACPI_FAILURE(status)) {
-                        return_ACPI_STATUS(status);
-                }
-        }
-
-        /*
-         * Allocate a new parser op to be the root of the parsed
-         * method tree
-         */
-        op = acpi_ps_alloc_op(AML_METHOD_OP);
-        if (!op) {
-                return_ACPI_STATUS(AE_NO_MEMORY);
-        }
-
-        /* Init new op with the method name and pointer back to the Node */
-
-        acpi_ps_set_name(op, node->name.integer);
-        op->common.node = node;
-
-        /*
-         * Get a new owner_id for objects created by this method. Namespace
-         * objects (such as Operation Regions) can be created during the
-         * first pass parse.
-         */
-        status = acpi_ut_allocate_owner_id(&obj_desc->method.owner_id);
-        if (ACPI_FAILURE(status)) {
-                goto cleanup;
-        }
-
-        /* Create and initialize a new walk state */
-
-        walk_state =
-            acpi_ds_create_walk_state(obj_desc->method.owner_id, NULL, NULL,
-                                      NULL);
-        if (!walk_state) {
-                status = AE_NO_MEMORY;
-                goto cleanup2;
+                /*
+                 * 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();
         }
-
-        status = acpi_ds_init_aml_walk(walk_state, op, node,
-                                       obj_desc->method.aml_start,
-                                       obj_desc->method.aml_length, NULL, 1);
+#ifdef ACPI_DISASSEMBLER
         if (ACPI_FAILURE(status)) {
-                acpi_ds_delete_walk_state(walk_state);
-                goto cleanup2;
-        }
+                /* Display method locals/args if disassembler is present */
 
-        /*
-         * Parse the method, first pass
-         *
-         * The first pass load is where newly declared named objects are added into
-         * the namespace.  Actual evaluation of the named objects (what would be
-         * called a "second pass") happens during the actual execution of the
-         * method so that operands to the named objects can take on dynamic
-         * run-time values.
-         */
-        status = acpi_ps_parse_aml(walk_state);
-        if (ACPI_FAILURE(status)) {
-                goto cleanup2;
+                acpi_dm_dump_method_info(status, walk_state, walk_state->op);
         }
+#endif
 
-        ACPI_DEBUG_PRINT((ACPI_DB_PARSE,
-                          "**** [%4.4s] Parsed **** named_obj=%p Op=%p\n",
-                          acpi_ut_get_node_name(node), node, op));
-
-        /*
-         * Delete the parse tree. We simply re-parse the method for every
-         * execution since there isn't much overhead (compared to keeping lots
-         * of parse trees around)
-         */
-        acpi_ns_delete_namespace_subtree(node);
-        acpi_ns_delete_namespace_by_owner(obj_desc->method.owner_id);
-
-      cleanup2:
-        acpi_ut_release_owner_id(&obj_desc->method.owner_id);
-
-      cleanup:
-        acpi_ps_delete_parse_tree(op);
-        return_ACPI_STATUS(status);
+        return (status);
 }
 
 /*******************************************************************************
@@ -195,9 +126,9 @@ acpi_status acpi_ds_parse_method(struct acpi_namespace_node *node)
  ******************************************************************************/
 
 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;
 
@@ -210,7 +141,8 @@ acpi_ds_begin_method_execution(struct acpi_namespace_node *method_node,
         /* Prevent wraparound of thread count */
 
         if (obj_desc->method.thread_count == ACPI_UINT8_MAX) {
-                ACPI_REPORT_ERROR(("Method reached maximum reentrancy limit (255)\n"));
+                ACPI_ERROR((AE_INFO,
+                            "Method reached maximum reentrancy limit (255)"));
                 return_ACPI_STATUS(AE_AML_METHOD_LIMIT);
         }
 
@@ -539,22 +471,61 @@ void acpi_ds_terminate_control_method(struct acpi_walk_state *walk_state)
                     acpi_os_signal_semaphore(walk_state->method_desc->method.
                                              semaphore, 1);
                 if (ACPI_FAILURE(status)) {
-                        ACPI_REPORT_ERROR(("Could not signal method semaphore\n"));
+                        ACPI_ERROR((AE_INFO,
+                                    "Could not signal method semaphore"));
 
                         /* Ignore error and continue cleanup */
                 }
         }
 
+        /*
+         * There are no more threads executing this method.  Perform
+         * additional cleanup.
+         *
+         * The method Node is stored in the walk state
+         */
+        method_node = walk_state->method_node;
+
+        /* Lock namespace for possible update */
+
+        status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
+        if (ACPI_FAILURE(status)) {
+                goto exit;
+        }
+
+        /*
+         * Delete any namespace entries created immediately underneath
+         * the method
+         */
+        if (method_node->child) {
+                acpi_ns_delete_namespace_subtree(method_node);
+        }
+
+        /*
+         * Delete any namespace entries created anywhere else within
+         * the namespace by the execution of this method
+         */
+        acpi_ns_delete_namespace_by_owner(walk_state->method_desc->method.
+                                          owner_id);
+        status = acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
+
+        /* Are there any other threads currently executing this method? */
+
         if (walk_state->method_desc->method.thread_count) {
+                /*
+                 * Additional threads. Do not release the owner_id in this case,
+                 * we immediately reuse it for the next thread executing this method
+                 */
                 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
-                                  "*** Not deleting method namespace, there are still %d threads\n",
+                                  "*** Completed execution of one thread, %d threads remaining\n",
                                   walk_state->method_desc->method.
                                   thread_count));
-        } else {                /* This is the last executing thread */
+        } else {
+                /* This is the only executing thread for this method */
 
                 /*
                  * Support to dynamically change a method from not_serialized to
-                 * Serialized if it appears that the method is written foolishly and
+                 * Serialized if it appears that the method is incorrectly written and
                  * does not support multiple thread execution.  The best example of this
                  * is if such a method creates namespace objects and blocks.  A second
                  * thread will fail with an AE_ALREADY_EXISTS exception
@@ -570,34 +541,8 @@ void acpi_ds_terminate_control_method(struct acpi_walk_state *walk_state)
                                                           semaphore);
                 }
 
-                /*
-                 * There are no more threads executing this method.  Perform
-                 * additional cleanup.
-                 *
-                 * The method Node is stored in the walk state
-                 */
-                method_node = walk_state->method_node;
-
-                /*
-                 * Delete any namespace entries created immediately underneath
-                 * the method
-                 */
-                status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
-                if (ACPI_FAILURE(status)) {
-                        goto exit;
-                }
-
-                if (method_node->child) {
-                        acpi_ns_delete_namespace_subtree(method_node);
-                }
+                /* No more threads, we can free the owner_id */
 
-                /*
-                 * Delete any namespace entries created anywhere else within
-                 * the namespace
-                 */
-                acpi_ns_delete_namespace_by_owner(walk_state->method_desc->
-                                                  method.owner_id);
-                status = acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
                 acpi_ut_release_owner_id(&walk_state->method_desc->method.
                                          owner_id);
         }
@@ -606,3 +551,140 @@ void acpi_ds_terminate_control_method(struct acpi_walk_state *walk_state)
         (void)acpi_ut_release_mutex(ACPI_MTX_PARSER);
         return_VOID;
 }
+
+#ifdef ACPI_INIT_PARSE_METHODS
+        /*
+         * Note 11/2005: Removed this code to parse all methods during table
+         * load because it causes problems if there are any errors during the
+         * parse. Also, it seems like overkill and we probably don't want to
+         * abort a table load because of an issue with a single method.
+         */
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ds_parse_method
+ *
+ * PARAMETERS:  Node        - Method node
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Parse the AML that is associated with the method.
+ *
+ * MUTEX:       Assumes parser is locked
+ *
+ ******************************************************************************/
+
+acpi_status acpi_ds_parse_method(struct acpi_namespace_node *node)
+{
+        acpi_status status;
+        union acpi_operand_object *obj_desc;
+        union acpi_parse_object *op;
+        struct acpi_walk_state *walk_state;
+
+        ACPI_FUNCTION_TRACE_PTR("ds_parse_method", node);
+
+        /* Parameter Validation */
+
+        if (!node) {
+                return_ACPI_STATUS(AE_NULL_ENTRY);
+        }
+
+        ACPI_DEBUG_PRINT((ACPI_DB_PARSE,
+                          "**** Parsing [%4.4s] **** named_obj=%p\n",
+                          acpi_ut_get_node_name(node), node));
+
+        /* Extract the method object from the method Node */
+
+        obj_desc = acpi_ns_get_attached_object(node);
+        if (!obj_desc) {
+                return_ACPI_STATUS(AE_NULL_OBJECT);
+        }
+
+        /* Create a mutex for the method if there is a concurrency limit */
+
+        if ((obj_desc->method.concurrency != ACPI_INFINITE_CONCURRENCY) &&
+            (!obj_desc->method.semaphore)) {
+                status = acpi_os_create_semaphore(obj_desc->method.concurrency,
+                                                  obj_desc->method.concurrency,
+                                                  &obj_desc->method.semaphore);
+                if (ACPI_FAILURE(status)) {
+                        return_ACPI_STATUS(status);
+                }
+        }
+
+        /*
+         * Allocate a new parser op to be the root of the parsed
+         * method tree
+         */
+        op = acpi_ps_alloc_op(AML_METHOD_OP);
+        if (!op) {
+                return_ACPI_STATUS(AE_NO_MEMORY);
+        }
+
+        /* Init new op with the method name and pointer back to the Node */
+
+        acpi_ps_set_name(op, node->name.integer);
+        op->common.node = node;
+
+        /*
+         * Get a new owner_id for objects created by this method. Namespace
+         * objects (such as Operation Regions) can be created during the
+         * first pass parse.
+         */
+        status = acpi_ut_allocate_owner_id(&obj_desc->method.owner_id);
+        if (ACPI_FAILURE(status)) {
+                goto cleanup;
+        }
+
+        /* Create and initialize a new walk state */
+
+        walk_state =
+            acpi_ds_create_walk_state(obj_desc->method.owner_id, NULL, NULL,
+                                      NULL);
+        if (!walk_state) {
+                status = AE_NO_MEMORY;
+                goto cleanup2;
+        }
+
+        status = acpi_ds_init_aml_walk(walk_state, op, node,
+                                       obj_desc->method.aml_start,
+                                       obj_desc->method.aml_length, NULL, 1);
+        if (ACPI_FAILURE(status)) {
+                acpi_ds_delete_walk_state(walk_state);
+                goto cleanup2;
+        }
+
+        /*
+         * Parse the method, first pass
+         *
+         * The first pass load is where newly declared named objects are added into
+         * the namespace.  Actual evaluation of the named objects (what would be
+         * called a "second pass") happens during the actual execution of the
+         * method so that operands to the named objects can take on dynamic
+         * run-time values.
+         */
+        status = acpi_ps_parse_aml(walk_state);
+        if (ACPI_FAILURE(status)) {
+                goto cleanup2;
+        }
+
+        ACPI_DEBUG_PRINT((ACPI_DB_PARSE,
+                          "**** [%4.4s] Parsed **** named_obj=%p Op=%p\n",
+                          acpi_ut_get_node_name(node), node, op));
+
+        /*
+         * Delete the parse tree. We simply re-parse the method for every
+         * execution since there isn't much overhead (compared to keeping lots
+         * of parse trees around)
+         */
+        acpi_ns_delete_namespace_subtree(node);
+        acpi_ns_delete_namespace_by_owner(obj_desc->method.owner_id);
+
+      cleanup2:
+        acpi_ut_release_owner_id(&obj_desc->method.owner_id);
+
+      cleanup:
+        acpi_ps_delete_parse_tree(op);
+        return_ACPI_STATUS(status);
+}
+#endif