Pull acpica-20060707 into test branch

17 files changed, 194 insertions, 106 deletions

diff --git a/drivers/acpi/dispatcher/dsinit.c b/drivers/acpi/dispatcher/dsinit.c
index daf51b5b587..1888c055d10 100644
--- a/drivers/acpi/dispatcher/dsinit.c
+++ b/drivers/acpi/dispatcher/dsinit.c
@@ -116,16 +116,6 @@ acpi_ds_init_one_object(acpi_handle obj_handle,
 
 	case ACPI_TYPE_METHOD:
 
-		/*
-		 * Set the execution data width (32 or 64) based upon the
-		 * revision number of the parent ACPI table.
-		 * TBD: This is really for possible future support of integer width
-		 * on a per-table basis. Currently, we just use a global for the width.
-		 */
-		if (info->table_desc->pointer->revision == 1) {
-			node->flags |= ANOBJ_DATA_WIDTH_32;
-		}
-
 		info->method_count++;
 		break;
 
diff --git a/drivers/acpi/dispatcher/dsmethod.c b/drivers/acpi/dispatcher/dsmethod.c
index a39a33f4847..cf888add319 100644
--- a/drivers/acpi/dispatcher/dsmethod.c
+++ b/drivers/acpi/dispatcher/dsmethod.c
@@ -134,7 +134,7 @@ acpi_ds_create_method_mutex(union acpi_operand_object *method_desc)
 	union acpi_operand_object *mutex_desc;
 	acpi_status status;
 
-	ACPI_FUNCTION_NAME(ds_create_method_mutex);
+	ACPI_FUNCTION_TRACE(ds_create_method_mutex);
 
 	/* Create the new mutex object */
 
@@ -493,7 +493,7 @@ acpi_ds_restart_control_method(struct acpi_walk_state *walk_state,
 
 	ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
 			  "****Restart [%4.4s] Op %p ReturnValueFromCallee %p\n",
-			  (char *)&walk_state->method_node->name,
+			  acpi_ut_get_node_name(walk_state->method_node),
 			  walk_state->method_call_op, return_desc));
 
 	ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
@@ -610,6 +610,7 @@ acpi_ds_terminate_control_method(union acpi_operand_object *method_desc,
 
 			acpi_os_release_mutex(method_desc->method.mutex->mutex.
 					      os_mutex);
+			method_desc->method.mutex->mutex.owner_thread = NULL;
 		}
 	}
 
@@ -620,27 +621,11 @@ acpi_ds_terminate_control_method(union acpi_operand_object *method_desc,
 		 */
 		method_node = walk_state->method_node;
 
-		/* Lock namespace for possible update */
-
-		status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
-		if (ACPI_FAILURE(status)) {
-			return_VOID;
-		}
-
-		/*
-		 * Delete any namespace entries created immediately underneath
-		 * the method
-		 */
-		if (method_node && method_node->child) {
-			acpi_ns_delete_namespace_subtree(method_node);
-		}
-
 		/*
-		 * Delete any namespace entries created anywhere else within
+		 * Delete any namespace objects created anywhere within
 		 * the namespace by the execution of this method
 		 */
 		acpi_ns_delete_namespace_by_owner(method_desc->method.owner_id);
-		status = acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
 	}
 
 	/* Decrement the thread count on the method */
diff --git a/drivers/acpi/dispatcher/dswexec.c b/drivers/acpi/dispatcher/dswexec.c
index b1ded62d0df..d7a616c3104 100644
--- a/drivers/acpi/dispatcher/dswexec.c
+++ b/drivers/acpi/dispatcher/dswexec.c
@@ -313,10 +313,10 @@ acpi_ds_exec_begin_op(struct acpi_walk_state *walk_state,
 	case AML_CLASS_EXECUTE:
 	case AML_CLASS_CREATE:
 		/*
-		 * Most operators with arguments.
+		 * Most operators with arguments (except create_xxx_field operators)
 		 * Start a new result/operand state
 		 */
-		if (walk_state->opcode != AML_CREATE_FIELD_OP) {
+		if (walk_state->op_info->object_type != ACPI_TYPE_BUFFER_FIELD) {
 			status = acpi_ds_result_stack_push(walk_state);
 		}
 		break;
diff --git a/drivers/acpi/events/evregion.c b/drivers/acpi/events/evregion.c
index 094a17e4c86..21caae04fe8 100644
--- a/drivers/acpi/events/evregion.c
+++ b/drivers/acpi/events/evregion.c
@@ -528,34 +528,40 @@ acpi_ev_detach_region(union acpi_operand_object *region_obj,
 				}
 			}
 
-			/* Call the setup handler with the deactivate notification */
+			/*
+			 * If the region has been activated, call the setup handler
+			 * with the deactivate notification
+			 */
+			if (region_obj->region.flags & AOPOBJ_SETUP_COMPLETE) {
+				region_setup = handler_obj->address_space.setup;
+				status =
+				    region_setup(region_obj,
+						 ACPI_REGION_DEACTIVATE,
+						 handler_obj->address_space.
+						 context, region_context);
 
-			region_setup = handler_obj->address_space.setup;
-			status =
-			    region_setup(region_obj, ACPI_REGION_DEACTIVATE,
-					 handler_obj->address_space.context,
-					 region_context);
+				/* Init routine may fail, Just ignore errors */
 
-			/* Init routine may fail, Just ignore errors */
+				if (ACPI_FAILURE(status)) {
+					ACPI_EXCEPTION((AE_INFO, status,
+							"from region handler - deactivate, [%s]",
+							acpi_ut_get_region_name
+							(region_obj->region.
+							 space_id)));
+				}
 
-			if (ACPI_FAILURE(status)) {
-				ACPI_EXCEPTION((AE_INFO, status,
-						"from region init, [%s]",
-						acpi_ut_get_region_name
-						(region_obj->region.space_id)));
+				region_obj->region.flags &=
+				    ~(AOPOBJ_SETUP_COMPLETE);
 			}
 
-			region_obj->region.flags &= ~(AOPOBJ_SETUP_COMPLETE);
-
 			/*
 			 * Remove handler reference in the region
 			 *
-			 * NOTE: this doesn't mean that the region goes away
-			 * The region is just inaccessible as indicated to
-			 * the _REG method
+			 * NOTE: this doesn't mean that the region goes away, the region
+			 * is just inaccessible as indicated to the _REG method
 			 *
-			 * If the region is on the handler's list
-			 * this better be the region's handler
+			 * If the region is on the handler's list, this must be the
+			 * region's handler
 			 */
 			region_obj->region.handler = NULL;
 			acpi_ut_remove_reference(handler_obj);
diff --git a/drivers/acpi/events/evxface.c b/drivers/acpi/events/evxface.c
index 4f948df17ab..923fd2b4695 100644
--- a/drivers/acpi/events/evxface.c
+++ b/drivers/acpi/events/evxface.c
@@ -428,7 +428,7 @@ acpi_remove_notify_handler(acpi_handle device,
 	node = acpi_ns_map_handle_to_node(device);
 	if (!node) {
 		status = AE_BAD_PARAMETER;
-		goto unlock;
+		goto unlock_and_exit;
 	}
 
 	/* Root Object */
@@ -442,7 +442,7 @@ acpi_remove_notify_handler(acpi_handle device,
 		    ((handler_type & ACPI_DEVICE_NOTIFY) &&
 		     !acpi_gbl_device_notify.handler)) {
 			status = AE_NOT_EXIST;
-			goto unlock;
+			goto unlock_and_exit;
 		}
 
 		/* Make sure all deferred tasks are completed */
@@ -474,7 +474,7 @@ acpi_remove_notify_handler(acpi_handle device,
 
 		if (!acpi_ev_is_notify_object(node)) {
 			status = AE_TYPE;
-			goto unlock;
+			goto unlock_and_exit;
 		}
 
 		/* Check for an existing internal object */
@@ -482,17 +482,21 @@ acpi_remove_notify_handler(acpi_handle device,
 		obj_desc = acpi_ns_get_attached_object(node);
 		if (!obj_desc) {
 			status = AE_NOT_EXIST;
-			goto unlock;
+			goto unlock_and_exit;
 		}
 
 		/* Object exists - make sure there's an existing handler */
 
 		if (handler_type & ACPI_SYSTEM_NOTIFY) {
 			notify_obj = obj_desc->common_notify.system_notify;
-			if ((!notify_obj) ||
-			    (notify_obj->notify.handler != handler)) {
+			if (!notify_obj) {
+				status = AE_NOT_EXIST;
+				goto unlock_and_exit;
+			}
+
+			if (notify_obj->notify.handler != handler) {
 				status = AE_BAD_PARAMETER;
-				goto unlock;
+				goto unlock_and_exit;
 			}
 			/* Make sure all deferred tasks are completed */
 
@@ -510,10 +514,14 @@ acpi_remove_notify_handler(acpi_handle device,
 
 		if (handler_type & ACPI_DEVICE_NOTIFY) {
 			notify_obj = obj_desc->common_notify.device_notify;
-			if ((!notify_obj) ||
-			    (notify_obj->notify.handler != handler)) {
+			if (!notify_obj) {
+				status = AE_NOT_EXIST;
+				goto unlock_and_exit;
+			}
+
+			if (notify_obj->notify.handler != handler) {
 				status = AE_BAD_PARAMETER;
-				goto unlock;
+				goto unlock_and_exit;
 			}
 			/* Make sure all deferred tasks are completed */
 
@@ -530,9 +538,9 @@ acpi_remove_notify_handler(acpi_handle device,
 		}
 	}
 
-unlock:
+      unlock_and_exit:
 	(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
-exit:
+      exit:
 	if (ACPI_FAILURE(status))
 		ACPI_EXCEPTION((AE_INFO, status, "Removing notify handler"));
 	return_ACPI_STATUS(status);
@@ -586,7 +594,7 @@ acpi_install_gpe_handler(acpi_handle gpe_device,
 	gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number);
 	if (!gpe_event_info) {
 		status = AE_BAD_PARAMETER;
-		goto unlock;
+		goto unlock_and_exit;
 	}
 
 	/* Make sure that there isn't a handler there already */
@@ -594,7 +602,7 @@ acpi_install_gpe_handler(acpi_handle gpe_device,
 	if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) ==
 	    ACPI_GPE_DISPATCH_HANDLER) {
 		status = AE_ALREADY_EXISTS;
-		goto unlock;
+		goto unlock_and_exit;
 	}
 
 	/* Allocate and init handler object */
@@ -602,7 +610,7 @@ acpi_install_gpe_handler(acpi_handle gpe_device,
 	handler = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_handler_info));
 	if (!handler) {
 		status = AE_NO_MEMORY;
-		goto unlock;
+		goto unlock_and_exit;
 	}
 
 	handler->address = address;
@@ -613,7 +621,7 @@ acpi_install_gpe_handler(acpi_handle gpe_device,
 
 	status = acpi_ev_disable_gpe(gpe_event_info);
 	if (ACPI_FAILURE(status)) {
-		goto unlock;
+		goto unlock_and_exit;
 	}
 
 	/* Install the handler */
@@ -628,9 +636,9 @@ acpi_install_gpe_handler(acpi_handle gpe_device,
 
 	acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
 
-unlock:
+      unlock_and_exit:
 	(void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
-exit:
+      exit:
 	if (ACPI_FAILURE(status))
 		ACPI_EXCEPTION((AE_INFO, status,
 				"Installing notify handler failed"));
diff --git a/drivers/acpi/events/evxfregn.c b/drivers/acpi/events/evxfregn.c
index e8b86a0baad..83b12a9afa3 100644
--- a/drivers/acpi/events/evxfregn.c
+++ b/drivers/acpi/events/evxfregn.c
@@ -155,7 +155,11 @@ acpi_remove_address_space_handler(acpi_handle device,
 	/* Convert and validate the device handle */
 
 	node = acpi_ns_map_handle_to_node(device);
-	if (!node) {
+	if (!node ||
+	    ((node->type != ACPI_TYPE_DEVICE) &&
+	     (node->type != ACPI_TYPE_PROCESSOR) &&
+	     (node->type != ACPI_TYPE_THERMAL) &&
+	     (node != acpi_gbl_root_node))) {
 		status = AE_BAD_PARAMETER;
 		goto unlock_and_exit;
 	}
@@ -178,6 +182,13 @@ acpi_remove_address_space_handler(acpi_handle device,
 
 		if (handler_obj->address_space.space_id == space_id) {
 
+			/* Handler must be the same as the installed handler */
+
+			if (handler_obj->address_space.handler != handler) {
+				status = AE_BAD_PARAMETER;
+				goto unlock_and_exit;
+			}
+
 			/* Matched space_id, first dereference this in the Regions */
 
 			ACPI_DEBUG_PRINT((ACPI_DB_OPREGION,
diff --git a/drivers/acpi/executer/exconfig.c b/drivers/acpi/executer/exconfig.c
index 83fed079a27..c8341fa5fe0 100644
--- a/drivers/acpi/executer/exconfig.c
+++ b/drivers/acpi/executer/exconfig.c
@@ -502,7 +502,6 @@ acpi_status acpi_ex_unload_table(union acpi_operand_object *ddb_handle)
 	 * (Offset contains the table_id)
 	 */
 	acpi_ns_delete_namespace_by_owner(table_info->owner_id);
-	acpi_ut_release_owner_id(&table_info->owner_id);
 
 	/* Delete the table itself */
 
diff --git a/drivers/acpi/executer/exconvrt.c b/drivers/acpi/executer/exconvrt.c
index b732e399b1e..544e81a6a43 100644
--- a/drivers/acpi/executer/exconvrt.c
+++ b/drivers/acpi/executer/exconvrt.c
@@ -170,6 +170,9 @@ acpi_ex_convert_to_integer(union acpi_operand_object *obj_desc,
 		return_ACPI_STATUS(AE_NO_MEMORY);
 	}
 
+	ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Converted value: %8.8X%8.8X\n",
+			  ACPI_FORMAT_UINT64(result)));
+
 	/* Save the Result */
 
 	return_desc->integer.value = result;
diff --git a/drivers/acpi/executer/exsystem.c b/drivers/acpi/executer/exsystem.c
index 6b5d1e6ce94..28aef3e69ec 100644
--- a/drivers/acpi/executer/exsystem.c
+++ b/drivers/acpi/executer/exsystem.c
@@ -60,7 +60,7 @@ ACPI_MODULE_NAME("exsystem")
  *
  * DESCRIPTION: Implements a semaphore wait with a check to see if the
  *              semaphore is available immediately.  If it is not, the
- *              interpreter is released.
+ *              interpreter is released before waiting.
  *
  ******************************************************************************/
 acpi_status acpi_ex_system_wait_semaphore(acpi_semaphore semaphore, u16 timeout)
@@ -110,9 +110,9 @@ acpi_status acpi_ex_system_wait_semaphore(acpi_semaphore semaphore, u16 timeout)
  *
  * RETURN:      Status
  *
- * DESCRIPTION: Implements a semaphore wait with a check to see if the
- *              semaphore is available immediately.  If it is not, the
- *              interpreter is released.
+ * DESCRIPTION: Implements a mutex wait with a check to see if the
+ *              mutex is available immediately.  If it is not, the
+ *              interpreter is released before waiting.
  *
  ******************************************************************************/
 
diff --git a/drivers/acpi/namespace/nsalloc.c b/drivers/acpi/namespace/nsalloc.c
index dc3f0739a46..55b407aae26 100644
--- a/drivers/acpi/namespace/nsalloc.c
+++ b/drivers/acpi/namespace/nsalloc.c
@@ -386,14 +386,17 @@ void acpi_ns_delete_namespace_subtree(struct acpi_namespace_node *parent_node)
  *              specific ID.  Used to delete entire ACPI tables.  All
  *              reference counts are updated.
  *
+ * MUTEX:       Locks namespace during deletion walk.
+ *
  ******************************************************************************/
 
 void acpi_ns_delete_namespace_by_owner(acpi_owner_id owner_id)
 {
 	struct acpi_namespace_node *child_node;
 	struct acpi_namespace_node *deletion_node;
-	u32 level;
 	struct acpi_namespace_node *parent_node;
+	u32 level;
+	acpi_status status;
 
 	ACPI_FUNCTION_TRACE_U32(ns_delete_namespace_by_owner, owner_id);
 
@@ -401,6 +404,13 @@ void acpi_ns_delete_namespace_by_owner(acpi_owner_id owner_id)
 		return_VOID;
 	}
 
+	/* Lock namespace for possible update */
+
+	status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
+	if (ACPI_FAILURE(status)) {
+		return_VOID;
+	}
+
 	deletion_node = NULL;
 	parent_node = acpi_gbl_root_node;
 	child_node = NULL;
@@ -469,5 +479,6 @@ void acpi_ns_delete_namespace_by_owner(acpi_owner_id owner_id)
 		}
 	}
 
+	(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
 	return_VOID;
 }
diff --git a/drivers/acpi/tables/tbget.c b/drivers/acpi/tables/tbget.c
index 99eacceff56..7856db759af 100644
--- a/drivers/acpi/tables/tbget.c
+++ b/drivers/acpi/tables/tbget.c
@@ -320,6 +320,16 @@ acpi_tb_get_this_table(struct acpi_pointer *address,
 
 	ACPI_FUNCTION_TRACE(tb_get_this_table);
 
+	/* Validate minimum length */
+
+	if (header->length < sizeof(struct acpi_table_header)) {
+		ACPI_ERROR((AE_INFO,
+			    "Table length (%X) is smaller than minimum (%X)",
+			    header->length, sizeof(struct acpi_table_header)));
+
+		return_ACPI_STATUS(AE_INVALID_TABLE_LENGTH);
+	}
+
 	/*
 	 * Flags contains the current processor mode (Virtual or Physical
 	 * addressing) The pointer_type is either Logical or Physical
@@ -356,7 +366,7 @@ acpi_tb_get_this_table(struct acpi_pointer *address,
 		 */
 		status = acpi_os_map_memory(address->pointer.physical,
 					    (acpi_size) header->length,
-					    (void *)&full_table);
+					    ACPI_CAST_PTR(void, &full_table));
 		if (ACPI_FAILURE(status)) {
 			ACPI_ERROR((AE_INFO,
 				    "Could not map memory for table [%4.4s] at %8.8X%8.8X for length %X",
diff --git a/drivers/acpi/tables/tbinstal.c b/drivers/acpi/tables/tbinstal.c
index 7ca2df75bb1..1668a232fb6 100644
--- a/drivers/acpi/tables/tbinstal.c
+++ b/drivers/acpi/tables/tbinstal.c
@@ -256,7 +256,7 @@ acpi_tb_init_table_descriptor(acpi_table_type table_type,
 
 	status = acpi_ut_allocate_owner_id(&table_desc->owner_id);
 	if (ACPI_FAILURE(status)) {
-		return_ACPI_STATUS(status);
+		goto error_exit1;
 	}
 
 	/* Install the table into the global data structure */
@@ -274,8 +274,8 @@ acpi_tb_init_table_descriptor(acpi_table_type table_type,
 		 * at this location, so return an error.
 		 */
 		if (list_head->next) {
-			ACPI_FREE(table_desc);
-			return_ACPI_STATUS(AE_ALREADY_EXISTS);
+			status = AE_ALREADY_EXISTS;
+			goto error_exit2;
 		}
 
 		table_desc->next = list_head->next;
@@ -335,6 +335,17 @@ acpi_tb_init_table_descriptor(acpi_table_type table_type,
 	table_info->owner_id = table_desc->owner_id;
 	table_info->installed_desc = table_desc;
 	return_ACPI_STATUS(AE_OK);
+
+	/* Error exit with cleanup */
+
+      error_exit2:
+
+	acpi_ut_release_owner_id(&table_desc->owner_id);
+
+      error_exit1:
+
+	ACPI_FREE(table_desc);
+	return_ACPI_STATUS(status);
 }
 
 /*******************************************************************************
@@ -525,6 +536,10 @@ struct acpi_table_desc *acpi_tb_uninstall_table(struct acpi_table_desc
 
 	acpi_tb_delete_single_table(table_desc);
 
+	/* Free the owner ID associated with this table */
+
+	acpi_ut_release_owner_id(&table_desc->owner_id);
+
 	/* Free the table descriptor */
 
 	next_desc = table_desc->next;
diff --git a/drivers/acpi/tables/tbrsdt.c b/drivers/acpi/tables/tbrsdt.c
index abcb08c2592..0ad3dbb9ebc 100644
--- a/drivers/acpi/tables/tbrsdt.c
+++ b/drivers/acpi/tables/tbrsdt.c
@@ -183,6 +183,17 @@ acpi_status acpi_tb_validate_rsdt(struct acpi_table_header *table_ptr)
 
 	ACPI_FUNCTION_ENTRY();
 
+	/* Validate minimum length */
+
+	if (table_ptr->length < sizeof(struct acpi_table_header)) {
+		ACPI_ERROR((AE_INFO,
+			    "RSDT/XSDT length (%X) is smaller than minimum (%X)",
+			    table_ptr->length,
+			    sizeof(struct acpi_table_header)));
+
+		return (AE_INVALID_TABLE_LENGTH);
+	}
+
 	/* Search for appropriate signature, RSDT or XSDT */
 
 	if (acpi_gbl_root_table_type == ACPI_TABLE_TYPE_RSDT) {
@@ -210,7 +221,7 @@ acpi_status acpi_tb_validate_rsdt(struct acpi_table_header *table_ptr)
 			ACPI_ERROR((AE_INFO, "Looking for XSDT"));
 		}
 
-		ACPI_DUMP_BUFFER((char *)table_ptr, 48);
+		ACPI_DUMP_BUFFER(ACPI_CAST_PTR(char, table_ptr), 48);
 		return (AE_BAD_SIGNATURE);
 	}
 
@@ -258,7 +269,7 @@ acpi_status acpi_tb_get_table_rsdt(void)
 
 	status = acpi_tb_validate_rsdt(table_info.pointer);
 	if (ACPI_FAILURE(status)) {
-		return_ACPI_STATUS(status);
+		goto error_cleanup;
 	}
 
 	/* Get the number of tables defined in the RSDT or XSDT */
@@ -270,14 +281,14 @@ acpi_status acpi_tb_get_table_rsdt(void)
 
 	status = acpi_tb_convert_to_xsdt(&table_info);
 	if (ACPI_FAILURE(status)) {
-		return_ACPI_STATUS(status);
+		goto error_cleanup;
 	}
 
 	/* Save the table pointers and allocation info */
 
 	status = acpi_tb_init_table_descriptor(ACPI_TABLE_ID_XSDT, &table_info);
 	if (ACPI_FAILURE(status)) {
-		return_ACPI_STATUS(status);
+		goto error_cleanup;
 	}
 
 	acpi_gbl_XSDT =
@@ -285,4 +296,12 @@ acpi_status acpi_tb_get_table_rsdt(void)
 
 	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "XSDT located at %p\n", acpi_gbl_XSDT));
 	return_ACPI_STATUS(status);
+
+      error_cleanup:
+
+	/* Free table allocated by acpi_tb_get_table */
+
+	acpi_tb_delete_single_table(&table_info);
+
+	return_ACPI_STATUS(status);
 }
diff --git a/drivers/acpi/tables/tbxface.c b/drivers/acpi/tables/tbxface.c
index 4e91f298481..7767987be15 100644
--- a/drivers/acpi/tables/tbxface.c
+++ b/drivers/acpi/tables/tbxface.c
@@ -134,8 +134,8 @@ ACPI_EXPORT_SYMBOL(acpi_load_tables)
  * RETURN:      Status
  *
  * DESCRIPTION: This function is called to load a table from the caller's
- *              buffer.  The buffer must contain an entire ACPI Table including
- *              a valid header.  The header fields will be verified, and if it
+ *              buffer. The buffer must contain an entire ACPI Table including
+ *              a valid header. The header fields will be verified, and if it
  *              is determined that the table is invalid, the call will fail.
  *
  ******************************************************************************/
@@ -245,15 +245,18 @@ acpi_status acpi_unload_table(acpi_table_type table_type)
 	/* Find all tables of the requested type */
 
 	table_desc = acpi_gbl_table_lists[table_type].next;
+	if (!table_desc) {
+		return_ACPI_STATUS(AE_NOT_EXIST);
+	}
+
 	while (table_desc) {
 		/*
-		 * Delete all namespace entries owned by this table.  Note that these
-		 * entries can appear anywhere in the namespace by virtue of the AML
-		 * "Scope" operator.  Thus, we need to track ownership by an ID, not
+		 * Delete all namespace objects owned by this table. Note that these
+		 * objects can appear anywhere in the namespace by virtue of the AML
+		 * "Scope" operator. Thus, we need to track ownership by an ID, not
 		 * simply a position within the hierarchy
 		 */
 		acpi_ns_delete_namespace_by_owner(table_desc->owner_id);
-		acpi_ut_release_owner_id(&table_desc->owner_id);
 		table_desc = table_desc->next;
 	}
 
@@ -275,12 +278,12 @@ ACPI_EXPORT_SYMBOL(acpi_unload_table)
  *                                see acpi_gbl_acpi_table_flag
  *              out_table_header - pointer to the struct acpi_table_header if successful
  *
- * DESCRIPTION: This function is called to get an ACPI table header.  The caller
+ * DESCRIPTION: This function is called to get an ACPI table header. The caller
  *              supplies an pointer to a data area sufficient to contain an ACPI
  *              struct acpi_table_header structure.
  *
  *              The header contains a length field that can be used to determine
- *              the size of the buffer needed to contain the entire table.  This
+ *              the size of the buffer needed to contain the entire table. This
  *              function is not valid for the RSD PTR table since it does not
  *              have a standard header and is fixed length.
  *
@@ -322,7 +325,8 @@ acpi_get_table_header(acpi_table_type table_type,
 
 	/* Copy the header to the caller's buffer */
 
-	ACPI_MEMCPY((void *)out_table_header, (void *)tbl_ptr,
+	ACPI_MEMCPY(ACPI_CAST_PTR(void, out_table_header),
+		    ACPI_CAST_PTR(void, tbl_ptr),
 		    sizeof(struct acpi_table_header));
 
 	return_ACPI_STATUS(status);
@@ -344,10 +348,10 @@ ACPI_EXPORT_SYMBOL(acpi_get_table_header)
  *
  * RETURN:      Status
  *
- * DESCRIPTION: This function is called to get an ACPI table.  The caller
+ * DESCRIPTION: This function is called to get an ACPI table. The caller
  *              supplies an out_buffer large enough to contain the entire ACPI
- *              table.  The caller should call the acpi_get_table_header function
- *              first to determine the buffer size needed.  Upon completion
+ *              table. The caller should call the acpi_get_table_header function
+ *              first to determine the buffer size needed. Upon completion
  *              the out_buffer->Length field will indicate the number of bytes
  *              copied into the out_buffer->buf_ptr buffer. This table will be
  *              a complete table including the header.
@@ -417,7 +421,9 @@ acpi_get_table(acpi_table_type table_type,
 
 	/* Copy the table to the buffer */
 
-	ACPI_MEMCPY((void *)ret_buffer->pointer, (void *)tbl_ptr, table_length);
+	ACPI_MEMCPY(ACPI_CAST_PTR(void, ret_buffer->pointer),
+		    ACPI_CAST_PTR(void, tbl_ptr), table_length);
+
 	return_ACPI_STATUS(AE_OK);
 }
 
diff --git a/drivers/acpi/utilities/utdelete.c b/drivers/acpi/utilities/utdelete.c
index 38ebe1c5433..9d3f1149ba2 100644
--- a/drivers/acpi/utilities/utdelete.c
+++ b/drivers/acpi/utilities/utdelete.c
@@ -447,11 +447,16 @@ acpi_ut_update_object_reference(union acpi_operand_object *object, u16 action)
 		 */
 		switch (ACPI_GET_OBJECT_TYPE(object)) {
 		case ACPI_TYPE_DEVICE:
+		case ACPI_TYPE_PROCESSOR:
+		case ACPI_TYPE_POWER:
+		case ACPI_TYPE_THERMAL:
 
-			acpi_ut_update_ref_count(object->device.system_notify,
-						 action);
-			acpi_ut_update_ref_count(object->device.device_notify,
-						 action);
+			/* Update the notify objects for these types (if present) */
+
+			acpi_ut_update_ref_count(object->common_notify.
+						 system_notify, action);
+			acpi_ut_update_ref_count(object->common_notify.
+						 device_notify, action);
 			break;
 
 		case ACPI_TYPE_PACKAGE:
diff --git a/drivers/acpi/utilities/utmisc.c b/drivers/acpi/utilities/utmisc.c
index 33268310c73..6d8a8211be9 100644
--- a/drivers/acpi/utilities/utmisc.c
+++ b/drivers/acpi/utilities/utmisc.c
@@ -65,7 +65,7 @@ ACPI_MODULE_NAME("utmisc")
 u8 acpi_ut_is_aml_table(struct acpi_table_header *table)
 {
 
-	/* Ignore tables that contain AML */
+	/* These are the only tables that contain executable AML */
 
 	if (ACPI_COMPARE_NAME(table->signature, DSDT_SIG) ||
 	    ACPI_COMPARE_NAME(table->signature, PSDT_SIG) ||
@@ -419,10 +419,15 @@ void acpi_ut_set_integer_width(u8 revision)
 {
 
 	if (revision <= 1) {
+
+		/* 32-bit case */
+
 		acpi_gbl_integer_bit_width = 32;
 		acpi_gbl_integer_nybble_width = 8;
 		acpi_gbl_integer_byte_width = 4;
 	} else {
+		/* 64-bit case (ACPI 2.0+) */
+
 		acpi_gbl_integer_bit_width = 64;
 		acpi_gbl_integer_nybble_width = 16;
 		acpi_gbl_integer_byte_width = 8;
@@ -502,6 +507,7 @@ acpi_ut_display_init_pathname(u8 type,
  * FUNCTION:    acpi_ut_valid_acpi_char
  *
  * PARAMETERS:  Char            - The character to be examined
+ *              Position        - Byte position (0-3)
  *
  * RETURN:      TRUE if the character is valid, FALSE otherwise
  *
@@ -609,7 +615,9 @@ acpi_name acpi_ut_repair_name(acpi_name name)
  *
  * RETURN:      Status and Converted value
  *
- * DESCRIPTION: Convert a string into an unsigned value.
+ * DESCRIPTION: Convert a string into an unsigned value. Performs either a
+ *              32-bit or 64-bit conversion, depending on the current mode
+ *              of the interpreter.
  *              NOTE: Does not support Octal strings, not needed.
  *
  ******************************************************************************/
@@ -627,7 +635,7 @@ acpi_ut_strtoul64(char *string, u32 base, acpi_integer * ret_integer)
 	u8 sign_of0x = 0;
 	u8 term = 0;
 
-	ACPI_FUNCTION_TRACE(ut_stroul64);
+	ACPI_FUNCTION_TRACE_STR(ut_stroul64, string);
 
 	switch (base) {
 	case ACPI_ANY_BASE:
@@ -675,11 +683,13 @@ acpi_ut_strtoul64(char *string, u32 base, acpi_integer * ret_integer)
 		}
 	}
 
+	/*
+	 * Perform a 32-bit or 64-bit conversion, depending upon the current
+	 * execution mode of the interpreter
+	 */
 	dividend = (mode32) ? ACPI_UINT32_MAX : ACPI_UINT64_MAX;
 
-	/* At least one character in the string here */
-
-	/* Main loop: convert the string to a 64-bit integer */
+	/* Main loop: convert the string to a 32- or 64-bit integer */
 
 	while (*string) {
 		if (ACPI_IS_DIGIT(*string)) {
@@ -754,6 +764,9 @@ acpi_ut_strtoul64(char *string, u32 base, acpi_integer * ret_integer)
 
       all_done:
 
+	ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Converted value: %8.8X%8.8X\n",
+			  ACPI_FORMAT_UINT64(return_value)));
+
 	*ret_integer = return_value;
 	return_ACPI_STATUS(AE_OK);
 
diff --git a/drivers/acpi/utilities/utstate.c b/drivers/acpi/utilities/utstate.c
index 0f5c5bb5def..eaa13d05c85 100644
--- a/drivers/acpi/utilities/utstate.c
+++ b/drivers/acpi/utilities/utstate.c
@@ -199,6 +199,13 @@ struct acpi_thread_state *acpi_ut_create_thread_state(void)
 	state->common.descriptor_type = ACPI_DESC_TYPE_STATE_THREAD;
 	state->thread.thread_id = acpi_os_get_thread_id();
 
+	/* Check for invalid thread ID - zero is very bad, it will break things */
+
+	if (!state->thread.thread_id) {
+		ACPI_ERROR((AE_INFO, "Invalid zero ID from AcpiOsGetThreadId"));
+		state->thread.thread_id = (acpi_thread_id) 1;
+	}
+
 	return_PTR((struct acpi_thread_state *)state);
 }