[ACPI] ACPICA 20040326 from Bob Moore

Implemented support for "wake" GPEs via interaction between
GPEs and the _PRW methods.  Every GPE that is pointed to by
one or more _PRWs is identified as a WAKE GPE and by default
will no longer be enabled at runtime.  Previously, we were
blindly enabling all GPEs with a corresponding _Lxx or _Exx
method - but most of these turn out to be WAKE GPEs anyway.
We believe this has been the cause of thousands of
"spurious" GPEs on some systems.

This new GPE behavior is can be reverted to the original
behavior (enable ALL GPEs at runtime) via a runtime flag.

Fixed a problem where aliased control methods could not
access objects properly.  The proper scope within the
namespace was not initialized (transferred to the target of
the aliased method) before executing the target method.

Fixed a potential race condition on internal object
deletion on the return object in AcpiEvaluateObject. 

Integrated a fix for resource descriptors where both
_MEM and _MTP were being extracted instead of just _MEM.
(i.e. bitmask was incorrectly too wide, 0x0F instead of 0x03.)

Added a special case for ACPI_ROOT_OBJECT in AcpiUtGetNodeName,
preventing a fault in some cases.

Updated Notify() values for debug statements in evmisc.c

Return proper status from AcpiUtMutexInitialize,
not just simply AE_OK.

drivers/acpi/events/evgpe.c

@@ -99,9 +99,8 @@ acpi_ev_get_gpe_event_info (
 		return (NULL);
 	}
 
-	/*
-	 * A Non-null gpe_device means this is a GPE Block Device.
-	 */
+	/* A Non-NULL gpe_device means this is a GPE Block Device */
+
 	obj_desc = acpi_ns_get_attached_object ((struct acpi_namespace_node *) gpe_device);
 	if (!obj_desc ||
 		!obj_desc->device.gpe_block) {
@@ -297,7 +296,7 @@ acpi_ev_asynch_execute_gpe_method (
 		}
 	}
 
-	if (local_gpe_event_info.flags & ACPI_EVENT_LEVEL_TRIGGERED) {
+	if ((local_gpe_event_info.flags & ACPI_GPE_XRUPT_TYPE_MASK) == ACPI_GPE_LEVEL_TRIGGERED) {
 		/*
 		 * GPE is level-triggered, we clear the GPE status bit after handling
 		 * the event.
@@ -346,7 +345,7 @@ acpi_ev_gpe_dispatch (
 	 * If edge-triggered, clear the GPE status bit now.  Note that
 	 * level-triggered events are cleared after the GPE is serviced.
 	 */
-	if (gpe_event_info->flags & ACPI_EVENT_EDGE_TRIGGERED) {
+	if ((gpe_event_info->flags & ACPI_GPE_XRUPT_TYPE_MASK) == ACPI_GPE_EDGE_TRIGGERED) {
 		status = acpi_hw_clear_gpe (gpe_event_info);
 		if (ACPI_FAILURE (status)) {
 			ACPI_REPORT_ERROR (("acpi_ev_gpe_dispatch: Unable to clear GPE[%2X]\n",
@@ -369,7 +368,7 @@ acpi_ev_gpe_dispatch (
 
 		/* It is now safe to clear level-triggered events. */
 
-		if (gpe_event_info->flags & ACPI_EVENT_LEVEL_TRIGGERED) {
+		if ((gpe_event_info->flags & ACPI_GPE_XRUPT_TYPE_MASK) == ACPI_GPE_LEVEL_TRIGGERED) {
 			status = acpi_hw_clear_gpe (gpe_event_info);
 			if (ACPI_FAILURE (status)) {
 				ACPI_REPORT_ERROR ((

drivers/acpi/events/evmisc.c

@@ -97,6 +97,20 @@ acpi_ev_is_notify_object (
  *
  ******************************************************************************/
 
+#ifdef ACPI_DEBUG_OUTPUT
+static const char                *acpi_notify_value_names[] =
+{
+	"Bus Check",
+	"Device Check",
+	"Device Wake",
+	"Eject request",
+	"Device Check Light",
+	"Frequency Mismatch",
+	"Bus Mode Mismatch",
+	"Power Fault"
+};
+#endif
+
 acpi_status
 acpi_ev_queue_notify_request (
 	struct acpi_namespace_node      *node,
@@ -112,7 +126,7 @@ acpi_ev_queue_notify_request (
 
 
 	/*
-	 * For value 1 (Ejection Request), some device method may need to be run.
+	 * For value 3 (Ejection Request), some device method may need to be run.
 	 * For value 2 (Device Wake) if _PRW exists, the _PS0 method may need to be run.
 	 * For value 0x80 (Status Change) on the power button or sleep button,
 	 * initiate soft-off or sleep operation?
@@ -120,26 +134,13 @@ acpi_ev_queue_notify_request (
 	ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
 		"Dispatching Notify(%X) on node %p\n", notify_value, node));
 
-	switch (notify_value) {
-	case 0:
-		ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Notify value: Re-enumerate Devices\n"));
-		break;
-
-	case 1:
-		ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Notify value: Ejection Request\n"));
-		break;
-
-	case 2:
-		ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Notify value: Device Wake\n"));
-		break;
-
-	case 0x80:
-		ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Notify value: Status Change\n"));
-		break;
-
-	default:
-		ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Unknown Notify Value: %X \n", notify_value));
-		break;
+	if (notify_value <= 7) {
+		ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Notify value: %s\n",
+				acpi_notify_value_names[notify_value]));
+	}
+	else {
+		ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "notify value: 0x2.2_x **Device Specific**\n",
+				notify_value));
 	}
 
 	/*

drivers/acpi/events/evxfevnt.c

@@ -247,16 +247,29 @@ acpi_enable_gpe (
 		goto unlock_and_exit;
 	}
 
-	/* Enable the requested GPE number */
+	/* Check for Wake vs Runtime GPE */
 
-	status = acpi_hw_enable_gpe (gpe_event_info);
+	if (flags & ACPI_EVENT_WAKE_ENABLE) {
+		/* Ensure the requested wake GPE is disabled */
+
+		status = acpi_hw_disable_gpe (gpe_event_info);
 		if (ACPI_FAILURE (status)) {
 			goto unlock_and_exit;
 		}
 
-	if (flags & ACPI_EVENT_WAKE_ENABLE) {
+		/* Defer Enable of Wake GPE until sleep time */
+
 		acpi_hw_enable_gpe_for_wakeup (gpe_event_info);
 	}
+	else {
+		/* Enable the requested runtime GPE  */
+
+		status = acpi_hw_enable_gpe (gpe_event_info);
+		if (ACPI_FAILURE (status)) {
+			goto unlock_and_exit;
+		}
+	}
+
 
 unlock_and_exit:
 	if (flags & ACPI_NOT_ISR) {

drivers/acpi/executer/excreate.c

@@ -84,14 +84,15 @@ acpi_ex_create_alias (
 	alias_node = (struct acpi_namespace_node *) walk_state->operands[0];
 	target_node = (struct acpi_namespace_node *) walk_state->operands[1];
 
-	if (target_node->type == ACPI_TYPE_LOCAL_ALIAS) {
+	if ((target_node->type == ACPI_TYPE_LOCAL_ALIAS) ||
+		(target_node->type == ACPI_TYPE_LOCAL_METHOD_ALIAS)) {
 		/*
 		 * Dereference an existing alias so that we don't create a chain
 		 * of aliases.  With this code, we guarantee that an alias is
 		 * always exactly one level of indirection away from the
 		 * actual aliased name.
 		 */
-		target_node = (struct acpi_namespace_node *) target_node->object;
+		target_node = ACPI_CAST_PTR (struct acpi_namespace_node, target_node->object);
 	}
 
 	/*
@@ -117,6 +118,17 @@ acpi_ex_create_alias (
 		alias_node->object = ACPI_CAST_PTR (union acpi_operand_object, target_node);
 		break;
 
+	case ACPI_TYPE_METHOD:
+
+		/*
+		 * The new alias has the type ALIAS and points to the original
+		 * NS node, not the object itself.  This is because for these
+		 * types, the object can change dynamically via a Store.
+		 */
+		alias_node->type = ACPI_TYPE_LOCAL_METHOD_ALIAS;
+		alias_node->object = ACPI_CAST_PTR (union acpi_operand_object, target_node);
+		break;
+
 	default:
 
 		/* Attach the original source object to the new Alias Node */

drivers/acpi/executer/exdump.c

@@ -774,6 +774,7 @@ acpi_ex_dump_object_descriptor (
 
 
 	case ACPI_TYPE_LOCAL_ALIAS:
+	case ACPI_TYPE_LOCAL_METHOD_ALIAS:
 	case ACPI_TYPE_LOCAL_EXTRA:
 	case ACPI_TYPE_LOCAL_DATA:
 	default:

drivers/acpi/executer/exresnte.c

@@ -108,10 +108,11 @@ acpi_ex_resolve_node_to_value (
 	ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Entry=%p source_desc=%p [%s]\n",
 		 node, source_desc, acpi_ut_get_type_name (entry_type)));
 
-	if (entry_type == ACPI_TYPE_LOCAL_ALIAS) {
+	if ((entry_type == ACPI_TYPE_LOCAL_ALIAS) ||
+		(entry_type == ACPI_TYPE_LOCAL_METHOD_ALIAS)) {
 		/* There is always exactly one level of indirection */
 
-		node       = (struct acpi_namespace_node *) node->object;
+		node       = ACPI_CAST_PTR (struct acpi_namespace_node, node->object);
 		source_desc = acpi_ns_get_attached_object (node);
 		entry_type = acpi_ns_get_type ((acpi_handle) node);
 		*object_ptr = node;

drivers/acpi/executer/exstoren.c

@@ -138,6 +138,7 @@ acpi_ex_resolve_object (
 
 
 	case ACPI_TYPE_LOCAL_ALIAS:
+	case ACPI_TYPE_LOCAL_METHOD_ALIAS:
 
 		/*
 		 * Aliases are resolved by acpi_ex_prep_operands

drivers/acpi/hardware/hwgpe.c

@@ -53,9 +53,9 @@
  *
  * FUNCTION:    acpi_hw_enable_gpe
  *
- * PARAMETERS:  gpe_number      - The GPE
+ * PARAMETERS:  gpe_event_info      - Info block for the GPE to be enabled
  *
- * RETURN:      None
+ * RETURN:      Status
  *
  * DESCRIPTION: Enable a single GPE.
  *
@@ -95,7 +95,7 @@ acpi_hw_enable_gpe (
  *
  * FUNCTION:    acpi_hw_enable_gpe_for_wakeup
  *
- * PARAMETERS:  gpe_number      - The GPE
+ * PARAMETERS:  gpe_event_info      - Info block for the GPE to be enabled
  *
  * RETURN:      None
  *
@@ -122,9 +122,11 @@ acpi_hw_enable_gpe_for_wakeup (
 	}
 
 	/*
-	 * Set the bit so we will not disable this when sleeping
+	 * Set the bit so we will not enable this GPE when sleeping (and disable
+	 * it upon wake)
 	 */
 	gpe_register_info->wake_enable |= gpe_event_info->bit_mask;
+	gpe_event_info->flags |= (ACPI_GPE_TYPE_WAKE | ACPI_GPE_ENABLED);
 }
 
 
@@ -132,9 +134,9 @@ acpi_hw_enable_gpe_for_wakeup (
  *
  * FUNCTION:    acpi_hw_disable_gpe
  *
- * PARAMETERS:  gpe_number      - The GPE
+ * PARAMETERS:  gpe_event_info      - Info block for the GPE to be disabled
  *
- * RETURN:      None
+ * RETURN:      Status
  *
  * DESCRIPTION: Disable a single GPE.
  *
@@ -177,6 +179,8 @@ acpi_hw_disable_gpe (
 		return (status);
 	}
 
+	/* Make sure this GPE is disabled for wake, also */
+
 	acpi_hw_disable_gpe_for_wakeup (gpe_event_info);
 	return (AE_OK);
 }
@@ -186,7 +190,7 @@ acpi_hw_disable_gpe (
  *
  * FUNCTION:    acpi_hw_disable_gpe_for_wakeup
  *
- * PARAMETERS:  gpe_number      - The GPE
+ * PARAMETERS:  gpe_event_info      - Info block for the GPE to be disabled
  *
  * RETURN:      None
  *
@@ -212,9 +216,8 @@ acpi_hw_disable_gpe_for_wakeup (
 		return;
 	}
 
-	/*
-	 * Clear the bit so we will disable this when sleeping
-	 */
+	/* Clear the bit so we will disable this when sleeping */
+
 	gpe_register_info->wake_enable &= ~(gpe_event_info->bit_mask);
 }
 
@@ -223,11 +226,11 @@ acpi_hw_disable_gpe_for_wakeup (
  *
  * FUNCTION:    acpi_hw_clear_gpe
  *
- * PARAMETERS:  gpe_number      - The GPE
+ * PARAMETERS:  gpe_event_info      - Info block for the GPE to be cleared
  *
- * RETURN:      None
+ * RETURN:      status_status
  *
- * DESCRIPTION: Clear a single GPE.
+ * DESCRIPTION: Clear the status bit for a single GPE.
  *
  ******************************************************************************/
 
@@ -256,9 +259,10 @@ acpi_hw_clear_gpe (
  *
  * FUNCTION:    acpi_hw_get_gpe_status
  *
- * PARAMETERS:  gpe_number      - The GPE
+ * PARAMETERS:  gpe_event_info      - Info block for the GPE to queried
+ *              event_status        - Where the GPE status is returned
  *
- * RETURN:      None
+ * RETURN:      Status
  *
  * DESCRIPTION: Return the status of a single GPE.
  *
@@ -376,7 +380,7 @@ acpi_hw_disable_gpe_block (
  *
  * RETURN:      Status
  *
- * DESCRIPTION: Clear all GPEs within a GPE block
+ * DESCRIPTION: Clear status bits for all GPEs within a GPE block
  *
  ******************************************************************************/
 
@@ -392,7 +396,7 @@ acpi_hw_clear_gpe_block (
 	/* Examine each GPE Register within the block */
 
 	for (i = 0; i < gpe_block->register_count; i++) {
-		/* Clear all GPEs in this register */
+		/* Clear status on all GPEs in this register */
 
 		status = acpi_hw_low_level_write (8, 0xFF,
 				 &gpe_block->register_info[i].status_address);
@@ -407,19 +411,20 @@ acpi_hw_clear_gpe_block (
 
 /******************************************************************************
  *
- * FUNCTION:    acpi_hw_disable_non_wakeup_gpe_block
+ * FUNCTION:    acpi_hw_prepare_gpe_block_for_sleep
  *
  * PARAMETERS:  gpe_xrupt_info      - GPE Interrupt info
  *              gpe_block           - Gpe Block info
  *
  * RETURN:      Status
  *
- * DESCRIPTION: Disable all GPEs except wakeup GPEs in a GPE block
+ * DESCRIPTION: Disable all runtime GPEs and enable all wakeup GPEs -- within
+ *              a single GPE block
  *
  ******************************************************************************/
 
 static acpi_status
-acpi_hw_disable_non_wakeup_gpe_block (
+acpi_hw_prepare_gpe_block_for_sleep (
 	struct acpi_gpe_xrupt_info      *gpe_xrupt_info,
 	struct acpi_gpe_block_info      *gpe_block)
 {
@@ -437,8 +442,11 @@ acpi_hw_disable_non_wakeup_gpe_block (
 
 	for (i = 0; i < gpe_block->register_count; i++) {
 		/*
-		 * Read the enabled status of all GPEs. We
+		 * Read the enabled/disabled status of all GPEs. We
 		 * will be using it to restore all the GPEs later.
+		 *
+		 * NOTE:  Wake GPEs are are ALL disabled at this time, so when we wake
+		 * and restore this register, they will be automatically disabled.
 		 */
 		status = acpi_hw_low_level_read (8, &in_value,
 				 &gpe_register_info->enable_address);
@@ -449,7 +457,8 @@ acpi_hw_disable_non_wakeup_gpe_block (
 		gpe_register_info->enable = (u8) in_value;
 
 		/*
-		 * Disable all GPEs except wakeup GPEs.
+		 * 1) Disable all runtime GPEs
+		 * 2) Enable all wakeup GPEs
 		 */
 		status = acpi_hw_low_level_write (8, gpe_register_info->wake_enable,
 				&gpe_register_info->enable_address);
@@ -457,6 +466,8 @@ acpi_hw_disable_non_wakeup_gpe_block (
 			return (status);
 		}
 
+		/* Point to next GPE register */
+
 		gpe_register_info++;
 	}
 
@@ -466,22 +477,22 @@ acpi_hw_disable_non_wakeup_gpe_block (
 
 /******************************************************************************
  *
- * FUNCTION:    acpi_hw_disable_non_wakeup_gpes
+ * FUNCTION:    acpi_hw_prepare_gpes_for_sleep
  *
  * PARAMETERS:  None
  *
- * RETURN:      None
+ * RETURN:      Status
  *
- * DESCRIPTION: Disable all non-wakeup GPEs
+ * DESCRIPTION: Disable all runtime GPEs, enable all wake GPEs.
  *              Called with interrupts disabled. The interrupt handler also
  *              modifies gpe_register_info->Enable, so it should not be
- *              given the chance to run until after non-wake GPEs are
+ *              given the chance to run until after the runtime GPEs are
  *              re-enabled.
  *
  ******************************************************************************/
 
 acpi_status
-acpi_hw_disable_non_wakeup_gpes (
+acpi_hw_prepare_gpes_for_sleep (
 	void)
 {
 	acpi_status                     status;
@@ -490,27 +501,27 @@ acpi_hw_disable_non_wakeup_gpes (
 	ACPI_FUNCTION_ENTRY ();
 
 
-	status = acpi_ev_walk_gpe_list (acpi_hw_disable_non_wakeup_gpe_block);
-
+	status = acpi_ev_walk_gpe_list (acpi_hw_prepare_gpe_block_for_sleep);
 	return (status);
 }
 
 
 /******************************************************************************
  *
- * FUNCTION:    acpi_hw_enable_non_wakeup_gpe_block
+ * FUNCTION:    acpi_hw_restore_gpe_block_on_wake
  *
  * PARAMETERS:  gpe_xrupt_info      - GPE Interrupt info
  *              gpe_block           - Gpe Block info
  *
  * RETURN:      Status
  *
- * DESCRIPTION: Enable a single GPE.
+ * DESCRIPTION: Enable all runtime GPEs and disable all wake GPEs -- in one
+ *              GPE block
  *
  ******************************************************************************/
 
 static acpi_status
-acpi_hw_enable_non_wakeup_gpe_block (
+acpi_hw_restore_gpe_block_on_wake (
 	struct acpi_gpe_xrupt_info      *gpe_xrupt_info,
 	struct acpi_gpe_block_info      *gpe_block)
 {
@@ -537,8 +548,12 @@ acpi_hw_enable_non_wakeup_gpe_block (
 		}
 
 		/*
-		 * We previously stored the enabled status of all GPEs.
-		 * Blast them back in.
+		 * Restore the GPE Enable register, which will do the following:
+		 *
+		 * 1) Disable all wakeup GPEs
+		 * 2) Enable all runtime GPEs
+		 *
+		 *  (On sleep, we saved the enabled status of all GPEs)
 		 */
 		status = acpi_hw_low_level_write (8, gpe_register_info->enable,
 				 &gpe_register_info->enable_address);
@@ -546,28 +561,30 @@ acpi_hw_enable_non_wakeup_gpe_block (
 			return (status);
 		}
 
+		/* Point to next GPE register */
+
 		gpe_register_info++;
 	}
 
-
 	return (AE_OK);
 }
 
 
 /******************************************************************************
  *
- * FUNCTION:    acpi_hw_enable_non_wakeup_gpes
+ * FUNCTION:    acpi_hw_restore_gpes_on_wake
  *
  * PARAMETERS:  None
  *
- * RETURN:      None
+ * RETURN:      Status
  *
- * DESCRIPTION: Enable all non-wakeup GPEs we previously enabled.
+ * DESCRIPTION: Enable all runtime GPEs and disable all wake GPEs -- in all
+ *              GPE blocks
  *
  ******************************************************************************/
 
 acpi_status
-acpi_hw_enable_non_wakeup_gpes (
+acpi_hw_restore_gpes_on_wake (
 	void)
 {
 	acpi_status                     status;
@@ -576,7 +593,6 @@ acpi_hw_enable_non_wakeup_gpes (
 	ACPI_FUNCTION_ENTRY ();
 
 
-	status = acpi_ev_walk_gpe_list (acpi_hw_enable_non_wakeup_gpe_block);
-
+	status = acpi_ev_walk_gpe_list (acpi_hw_restore_gpe_block_on_wake);
 	return (status);
 }

drivers/acpi/hardware/hwsleep.c

@@ -286,7 +286,11 @@ acpi_enter_sleep_state (
 		}
 	}
 
-	status = acpi_hw_disable_non_wakeup_gpes ();
+	/*
+	 * 1) Disable all runtime GPEs
+	 * 2) Enable all wakeup GPEs
+	 */
+	status = acpi_hw_prepare_gpes_for_sleep ();
 	if (ACPI_FAILURE (status)) {
 		return_ACPI_STATUS (status);
 	}
@@ -415,7 +419,11 @@ acpi_enter_sleep_state_s4bios (
 		return_ACPI_STATUS (status);
 	}
 
-	status = acpi_hw_disable_non_wakeup_gpes ();
+	/*
+	 * 1) Disable all runtime GPEs
+	 * 2) Enable all wakeup GPEs
+	 */
+	status = acpi_hw_prepare_gpes_for_sleep ();
 	if (ACPI_FAILURE (status)) {
 		return_ACPI_STATUS (status);
 	}
@@ -528,10 +536,14 @@ acpi_leave_sleep_state (
 	if (ACPI_FAILURE (status) && status != AE_NOT_FOUND) {
 		ACPI_REPORT_ERROR (("Method _WAK failed, %s\n", acpi_format_exception (status)));
 	}
+	/* TBD: _WAK "sometimes" returns stuff - do we want to look at it? */
 
-	/* _WAK returns stuff - do we want to look at it? */
-
-	status = acpi_hw_enable_non_wakeup_gpes ();
+	/*
+	 * Restore the GPEs:
+	 * 1) Disable all wakeup GPEs
+	 * 2) Enable all runtime GPEs
+	 */
+	status = acpi_hw_restore_gpes_on_wake ();
 	if (ACPI_FAILURE (status)) {
 		return_ACPI_STATUS (status);
 	}

drivers/acpi/namespace/nsaccess.c

@@ -247,6 +247,14 @@ acpi_ns_root_initialize (void)
 
 unlock_and_exit:
 	(void) acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
+
+	/* Save a handle to "_GPE", it is always present */
+
+	if (ACPI_SUCCESS (status)) {
+		status = acpi_ns_get_node_by_path ("\\_GPE", NULL, ACPI_NS_NO_UPSEARCH,
+				  &acpi_gbl_fadt_gpe_device);
+	}
+
 	return_ACPI_STATUS (status);
 }
 
@@ -577,6 +585,7 @@ acpi_ns_lookup (
 		if ((num_segments       == 0)                               &&
 			(type_to_check_for  != ACPI_TYPE_ANY)                   &&
 			(type_to_check_for  != ACPI_TYPE_LOCAL_ALIAS)           &&
+			(type_to_check_for  != ACPI_TYPE_LOCAL_METHOD_ALIAS)    &&
 			(type_to_check_for  != ACPI_TYPE_LOCAL_SCOPE)           &&
 			(this_node->type    != ACPI_TYPE_ANY)                   &&
 			(this_node->type    != type_to_check_for)) {

drivers/acpi/namespace/nsdump.c

@@ -351,6 +351,7 @@ acpi_ns_dump_one_object (
 
 
 		case ACPI_TYPE_LOCAL_ALIAS:
+		case ACPI_TYPE_LOCAL_METHOD_ALIAS:
 
 			acpi_os_printf ("Target %4.4s (%p)\n", acpi_ut_get_node_name (obj_desc), obj_desc);
 			break;

drivers/acpi/namespace/nseval.c

@@ -310,6 +310,15 @@ acpi_ns_evaluate_by_handle (
 		return_ACPI_STATUS (AE_BAD_PARAMETER);
 	}
 
+	/*
+	 * For a method alias, we must grab the actual method node
+	 * so that proper scoping context will be established
+	 * before execution.
+	 */
+	if (acpi_ns_get_type (node) == ACPI_TYPE_LOCAL_METHOD_ALIAS) {
+		node = ACPI_CAST_PTR (struct acpi_namespace_node, node->object);
+	}
+
 	/*
 	 * Two major cases here:
 	 * 1) The object is an actual control method -- execute it.

drivers/acpi/namespace/nssearch.c

@@ -113,6 +113,12 @@ acpi_ns_search_node (
 		/* Check for match against the name */
 
 		if (next_node->name.integer == target_name) {
+			/* Resolve a control method alias if any */
+
+			if (acpi_ns_get_type (next_node) == ACPI_TYPE_LOCAL_METHOD_ALIAS) {
+				next_node = ACPI_CAST_PTR (struct acpi_namespace_node, next_node->object);
+			}
+
 			/*
 			 * Found matching entry.
 			 */

drivers/acpi/namespace/nsutils.c

@@ -256,7 +256,7 @@ acpi_ns_get_type (
 
 
 	if (!node) {
-		ACPI_REPORT_WARNING (("ns_get_type: Null Node ptr"));
+		ACPI_REPORT_WARNING (("ns_get_type: Null Node input pointer\n"));
 		return_VALUE (ACPI_TYPE_ANY);
 	}
 

drivers/acpi/namespace/nsxfeval.c

@@ -45,6 +45,7 @@
 
 #include <acpi/acpi.h>
 #include <acpi/acnamesp.h>
+#include <acpi/acinterp.h>
 
 
 #define _COMPONENT          ACPI_NAMESPACE
@@ -149,11 +150,11 @@ acpi_evaluate_object_typed (
  * FUNCTION:    acpi_evaluate_object
  *
  * PARAMETERS:  Handle              - Object handle (optional)
- *              *Pathname           - Object pathname (optional)
- *              **external_params   - List of parameters to pass to method,
+ *              Pathname            - Object pathname (optional)
+ *              external_params     - List of parameters to pass to method,
  *                                    terminated by NULL.  May be NULL
  *                                    if no parameters are being passed.
- *              *return_buffer      - Where to put method's return value (if
+ *              return_buffer       - Where to put method's return value (if
  *                                    any).  If NULL, no value is returned.
  *
  * RETURN:      Status
@@ -172,6 +173,7 @@ acpi_evaluate_object (
 	struct acpi_buffer              *return_buffer)
 {
 	acpi_status                     status;
+	acpi_status                     status2;
 	union acpi_operand_object       **internal_params = NULL;
 	union acpi_operand_object       *internal_return_obj = NULL;
 	acpi_size                       buffer_space_needed;
@@ -321,14 +323,20 @@ acpi_evaluate_object (
 		}
 	}
 
-	/* Delete the return and parameter objects */
-
 	if (internal_return_obj) {
+		/*
+		 * Delete the internal return object.  NOTE: Interpreter
+		 * must be locked to avoid race condition.
+		 */
+		status2 = acpi_ex_enter_interpreter ();
+		if (ACPI_SUCCESS (status2)) {
 			/*
 			 * Delete the internal return object. (Or at least
 			 * decrement the reference count by one)
 			 */
 			acpi_ut_remove_reference (internal_return_obj);
+			acpi_ex_exit_interpreter ();
+		}
 	}
 
 	/*

drivers/acpi/resources/rsaddr.c

@@ -88,6 +88,7 @@ acpi_rs_address16_resource (
 
 	ACPI_FUNCTION_TRACE ("rs_address16_resource");
 
+
 	/*
 	 * Point past the Descriptor to get the number of bytes consumed
 	 */
@@ -149,7 +150,7 @@ acpi_rs_address16_resource (
 		output_struct->data.address16.attribute.memory.read_write_attribute =
 				(u16) (temp8 & 0x01);
 		output_struct->data.address16.attribute.memory.cache_attribute =
-				(u16) ((temp8 >> 1) & 0x0F);
+				(u16) ((temp8 >> 1) & 0x03);
 	}
 	else {
 		if (ACPI_IO_RANGE == output_struct->data.address16.resource_type) {
@@ -347,7 +348,7 @@ acpi_rs_address16_stream (
 
 		temp8 |=
 			(linked_list->data.address16.attribute.memory.cache_attribute &
-			 0x0F) << 1;
+			 0x03) << 1;
 	}
 	else if (ACPI_IO_RANGE == linked_list->data.address16.resource_type) {
 		temp8 = (u8)
@@ -539,7 +540,7 @@ acpi_rs_address32_resource (
 				(u16) (temp8 & 0x01);
 
 		output_struct->data.address32.attribute.memory.cache_attribute =
-				(u16) ((temp8 >> 1) & 0x0F);
+				(u16) ((temp8 >> 1) & 0x03);
 	}
 	else {
 		if (ACPI_IO_RANGE == output_struct->data.address32.resource_type) {
@@ -735,7 +736,7 @@ acpi_rs_address32_stream (
 
 		temp8 |=
 			(linked_list->data.address32.attribute.memory.cache_attribute &
-			 0x0F) << 1;
+			 0x03) << 1;
 	}
 	else if (ACPI_IO_RANGE == linked_list->data.address32.resource_type) {
 		temp8 = (u8)
@@ -926,7 +927,7 @@ acpi_rs_address64_resource (
 				(u16) (temp8 & 0x01);
 
 		output_struct->data.address64.attribute.memory.cache_attribute =
-				(u16) ((temp8 >> 1) & 0x0F);
+				(u16) ((temp8 >> 1) & 0x03);
 	}
 	else {
 		if (ACPI_IO_RANGE == output_struct->data.address64.resource_type) {
@@ -1124,7 +1125,7 @@ acpi_rs_address64_stream (
 
 		temp8 |=
 			(linked_list->data.address64.attribute.memory.cache_attribute &
-			 0x0F) << 1;
+			 0x03) << 1;
 	}
 	else if (ACPI_IO_RANGE == linked_list->data.address64.resource_type) {
 		temp8 = (u8)

drivers/acpi/utilities/utglobal.c

@@ -253,14 +253,15 @@ const u8                                acpi_gbl_ns_properties[] =
 	ACPI_NS_NORMAL,                     /* 19 index_field      */
 	ACPI_NS_NORMAL,                     /* 20 Reference        */
 	ACPI_NS_NORMAL,                     /* 21 Alias            */
-	ACPI_NS_NORMAL,                     /* 22 Notify           */
-	ACPI_NS_NORMAL,                     /* 23 Address Handler  */
-	ACPI_NS_NEWSCOPE | ACPI_NS_LOCAL,   /* 24 Resource Desc    */
-	ACPI_NS_NEWSCOPE | ACPI_NS_LOCAL,   /* 25 Resource Field   */
-	ACPI_NS_NEWSCOPE,                   /* 26 Scope            */
-	ACPI_NS_NORMAL,                     /* 27 Extra            */
-	ACPI_NS_NORMAL,                     /* 28 Data             */
-	ACPI_NS_NORMAL                      /* 29 Invalid          */
+	ACPI_NS_NORMAL,                     /* 22 method_alias     */
+	ACPI_NS_NORMAL,                     /* 23 Notify           */
+	ACPI_NS_NORMAL,                     /* 24 Address Handler  */
+	ACPI_NS_NEWSCOPE | ACPI_NS_LOCAL,   /* 25 Resource Desc    */
+	ACPI_NS_NEWSCOPE | ACPI_NS_LOCAL,   /* 26 Resource Field   */
+	ACPI_NS_NEWSCOPE,                   /* 27 Scope            */
+	ACPI_NS_NORMAL,                     /* 28 Extra            */
+	ACPI_NS_NORMAL,                     /* 29 Data             */
+	ACPI_NS_NORMAL                      /* 30 Invalid          */
 };
 
 
@@ -501,14 +502,15 @@ static const char                   *acpi_gbl_ns_type_names[] = /* printable nam
 	/* 19 */ "index_field",
 	/* 20 */ "Reference",
 	/* 21 */ "Alias",
-	/* 22 */ "Notify",
-	/* 23 */ "addr_handler",
-	/* 24 */ "resource_desc",
-	/* 25 */ "resource_fld",
-	/* 26 */ "Scope",
-	/* 27 */ "Extra",
-	/* 28 */ "Data",
-	/* 39 */ "Invalid"
+	/* 22 */ "method_alias",
+	/* 23 */ "Notify",
+	/* 24 */ "addr_handler",
+	/* 25 */ "resource_desc",
+	/* 26 */ "resource_fld",
+	/* 27 */ "Scope",
+	/* 28 */ "Extra",
+	/* 29 */ "Data",
+	/* 30 */ "Invalid"
 };
 
 
@@ -556,7 +558,7 @@ char *
 acpi_ut_get_node_name (
 	void                            *object)
 {
-	struct acpi_namespace_node      *node;
+	struct acpi_namespace_node      *node = (struct acpi_namespace_node *) object;
 
 
 	if (!object)
@@ -564,7 +566,10 @@ acpi_ut_get_node_name (
 		return ("NULL NODE");
 	}
 
-	node = (struct acpi_namespace_node *) object;
+	if (object == ACPI_ROOT_OBJECT)
+	{
+		node = acpi_gbl_root_node;
+	}
 
 	if (node->descriptor != ACPI_DESC_TYPE_NAMED)
 	{
@@ -782,6 +787,7 @@ acpi_ut_init_globals (
 
 	acpi_gbl_create_osi_method = TRUE;
 	acpi_gbl_all_methods_serialized = FALSE;
+	acpi_gbl_leave_wake_gpes_disabled = TRUE;
 
 	/* Memory allocation and cache lists */
 

drivers/acpi/utilities/utmisc.c

@@ -529,6 +529,7 @@ acpi_ut_strupr (
 	return (src_string);
 }
 
+
 /*******************************************************************************
  *
  * FUNCTION:    acpi_ut_mutex_initialize
@@ -562,10 +563,8 @@ acpi_ut_mutex_initialize (
 		}
 	}
 
-
 	status = acpi_os_create_lock (&acpi_gbl_gpe_lock);
-
-	return_ACPI_STATUS (AE_OK);
+	return_ACPI_STATUS (status);
 }
 
 

include/acpi/acconfig.h

@@ -64,7 +64,7 @@
 
 /* Version string */
 
-#define ACPI_CA_VERSION                 0x20040311
+#define ACPI_CA_VERSION                 0x20040326
 
 /* Maximum objects in the various object caches */
 

include/acpi/acglobal.h

@@ -87,6 +87,7 @@ extern      u32                                 acpi_gbl_nesting_level;
 
 ACPI_EXTERN u8                                  acpi_gbl_create_osi_method;
 ACPI_EXTERN u8                                  acpi_gbl_all_methods_serialized;
+ACPI_EXTERN u8                                  acpi_gbl_leave_wake_gpes_disabled;
 
 /*****************************************************************************
  *
@@ -196,6 +197,7 @@ extern const char                              *acpi_gbl_valid_osi_strings[ACPI_
 
 ACPI_EXTERN struct acpi_namespace_node          acpi_gbl_root_node_struct;
 ACPI_EXTERN struct acpi_namespace_node         *acpi_gbl_root_node;
+ACPI_EXTERN struct acpi_namespace_node         *acpi_gbl_fadt_gpe_device;
 
 extern const u8                                 acpi_gbl_ns_properties[NUM_NS_TYPES];
 extern const struct acpi_predefined_names       acpi_gbl_pre_defined_names [NUM_PREDEFINED_NAMES];

include/acpi/achware.h

@@ -149,11 +149,11 @@ acpi_hw_get_gpe_status (
 	acpi_event_status               *event_status);
 
 acpi_status
-acpi_hw_disable_non_wakeup_gpes (
+acpi_hw_prepare_gpes_for_sleep (
 	void);
 
 acpi_status
-acpi_hw_enable_non_wakeup_gpes (
+acpi_hw_restore_gpes_on_wake (
 	void);
 
 

include/acpi/aclocal.h

@@ -360,6 +360,13 @@ struct acpi_gpe_xrupt_info
 };
 
 
+struct acpi_gpe_walk_info
+{
+	struct acpi_namespace_node              *gpe_device;
+	struct acpi_gpe_block_info              *gpe_block;
+};
+
+
 typedef acpi_status (*ACPI_GPE_CALLBACK) (
 	struct acpi_gpe_xrupt_info      *gpe_xrupt_info,
 	struct acpi_gpe_block_info      *gpe_block);

include/acpi/actypes.h

@@ -413,7 +413,7 @@ typedef u32                                     acpi_table_type;
  * of the ACPI object_type() operator (See the ACPI Spec). Therefore,
  * only add to the first group if the spec changes.
  *
- * Types must be kept in sync with the global acpi_ns_properties
+ * NOTE: Types must be kept in sync with the global acpi_ns_properties
  * and acpi_ns_type_names arrays.
  */
 typedef u32                                     acpi_object_type;
@@ -450,26 +450,27 @@ typedef u32                                     acpi_object_type;
 #define ACPI_TYPE_LOCAL_INDEX_FIELD     0x13
 #define ACPI_TYPE_LOCAL_REFERENCE       0x14  /* Arg#, Local#, Name, Debug, ref_of, Index */
 #define ACPI_TYPE_LOCAL_ALIAS           0x15
-#define ACPI_TYPE_LOCAL_NOTIFY          0x16
-#define ACPI_TYPE_LOCAL_ADDRESS_HANDLER 0x17
-#define ACPI_TYPE_LOCAL_RESOURCE        0x18
-#define ACPI_TYPE_LOCAL_RESOURCE_FIELD  0x19
-#define ACPI_TYPE_LOCAL_SCOPE           0x1A  /* 1 Name, multiple object_list Nodes */
+#define ACPI_TYPE_LOCAL_METHOD_ALIAS    0x16
+#define ACPI_TYPE_LOCAL_NOTIFY          0x17
+#define ACPI_TYPE_LOCAL_ADDRESS_HANDLER 0x18
+#define ACPI_TYPE_LOCAL_RESOURCE        0x19
+#define ACPI_TYPE_LOCAL_RESOURCE_FIELD  0x1A
+#define ACPI_TYPE_LOCAL_SCOPE           0x1B  /* 1 Name, multiple object_list Nodes */
 
-#define ACPI_TYPE_NS_NODE_MAX           0x1A  /* Last typecode used within a NS Node */
+#define ACPI_TYPE_NS_NODE_MAX           0x1B  /* Last typecode used within a NS Node */
 
 /*
  * These are special object types that never appear in
  * a Namespace node, only in an union acpi_operand_object
  */
-#define ACPI_TYPE_LOCAL_EXTRA           0x1B
-#define ACPI_TYPE_LOCAL_DATA            0x1C
+#define ACPI_TYPE_LOCAL_EXTRA           0x1C
+#define ACPI_TYPE_LOCAL_DATA            0x1D
 
-#define ACPI_TYPE_LOCAL_MAX             0x1C
+#define ACPI_TYPE_LOCAL_MAX             0x1D
 
 /* All types above here are invalid */
 
-#define ACPI_TYPE_INVALID               0x1D
+#define ACPI_TYPE_INVALID               0x1E
 #define ACPI_TYPE_NOT_FOUND             0xFF
 
 
@@ -511,9 +512,8 @@ typedef u32                                     acpi_object_type;
 #define ACPI_WRITE                      1
 #define ACPI_IO_MASK                    1
 
-
 /*
- * Acpi Event Types: Fixed & General Purpose
+ * Event Types: Fixed & General Purpose
  */
 typedef u32                                     acpi_event_type;
 
@@ -528,25 +528,8 @@ typedef u32                                     acpi_event_type;
 #define ACPI_EVENT_MAX                  4
 #define ACPI_NUM_FIXED_EVENTS           ACPI_EVENT_MAX + 1
 
-#define ACPI_GPE_INVALID                0xFF
-#define ACPI_GPE_MAX                    0xFF
-#define ACPI_NUM_GPE                    256
-
-#define ACPI_EVENT_LEVEL_TRIGGERED      1
-#define ACPI_EVENT_EDGE_TRIGGERED       2
-
 /*
- * Flags for GPE and Lock interfaces
- */
-#define ACPI_EVENT_WAKE_ENABLE          0x2
-#define ACPI_EVENT_WAKE_DISABLE         0x2
-
-#define ACPI_NOT_ISR                    0x1
-#define ACPI_ISR                        0x0
-
-
-/*
- * acpi_event Status:
+ * Event Status - Per event
  * -------------
  * The encoding of acpi_event_status is illustrated below.
  * Note that a set bit (1) indicates the property is TRUE
@@ -567,6 +550,45 @@ typedef u32                                     acpi_event_status;
 #define ACPI_EVENT_FLAG_WAKE_ENABLED    (acpi_event_status) 0x02
 #define ACPI_EVENT_FLAG_SET             (acpi_event_status) 0x04
 
+/*
+ * General Purpose Events (GPE)
+ */
+#define ACPI_GPE_INVALID                0xFF
+#define ACPI_GPE_MAX                    0xFF
+#define ACPI_NUM_GPE                    256
+
+/*
+ * GPE info flags - Per GPE
+ * +---------+-+-+-+
+ * |Bits 8:3 |2|1|0|
+ * +---------+-+-+-+
+ *          | | | |
+ *          | | | +- Edge or Level Triggered
+ *          | | +--- Type: Wake or Runtime
+ *          | +----- Enabled for wake?
+ *          +--------<Reserved>
+ */
+#define ACPI_GPE_XRUPT_TYPE_MASK        (u8) 1
+#define ACPI_GPE_LEVEL_TRIGGERED        (u8) 1
+#define ACPI_GPE_EDGE_TRIGGERED         (u8) 0
+
+#define ACPI_GPE_TYPE_MASK              (u8) 2
+#define ACPI_GPE_TYPE_WAKE              (u8) 2
+#define ACPI_GPE_TYPE_RUNTIME           (u8) 0       /* Default */
+
+#define ACPI_GPE_ENABLE_MASK            (u8) 4
+#define ACPI_GPE_ENABLED                (u8) 4
+#define ACPI_GPE_DISABLED               (u8) 0       /* Default */
+
+/*
+ * Flags for GPE and Lock interfaces
+ */
+#define ACPI_EVENT_WAKE_ENABLE          0x2
+#define ACPI_EVENT_WAKE_DISABLE         0x2
+
+#define ACPI_NOT_ISR                    0x1
+#define ACPI_ISR                        0x0
+
 
 /* Notify types */
 

include/acpi/acutils.h

@@ -471,6 +471,7 @@ acpi_ut_delete_internal_object_list (
 #define METHOD_NAME__PRT        "_PRT"
 #define METHOD_NAME__CRS        "_CRS"
 #define METHOD_NAME__PRS        "_PRS"
+#define METHOD_NAME__PRW        "_PRW"
 
 
 acpi_status