Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/drivers/acpi/events/evxface.c b/drivers/acpi/events/evxface.c
new file mode 100644
index 0000000..0bfec10
--- /dev/null
+++ b/drivers/acpi/events/evxface.c
@@ -0,0 +1,834 @@
+/******************************************************************************
+ *
+ * Module Name: evxface - External interfaces for ACPI events
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2005, R. Byron Moore
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions, and the following disclaimer,
+ * without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ * substantially similar to the "NO WARRANTY" disclaimer below
+ * ("Disclaimer") and any redistribution must be conditioned upon
+ * including a substantially similar Disclaimer requirement for further
+ * binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ * of any contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ */
+
+#include <linux/module.h>
+
+#include <acpi/acpi.h>
+#include <acpi/acnamesp.h>
+#include <acpi/acevents.h>
+#include <acpi/acinterp.h>
+
+#define _COMPONENT ACPI_EVENTS
+ ACPI_MODULE_NAME ("evxface")
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_install_exception_handler
+ *
+ * PARAMETERS: Handler - Pointer to the handler function for the
+ * event
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Saves the pointer to the handler function
+ *
+ ******************************************************************************/
+#ifdef ACPI_FUTURE_USAGE
+acpi_status
+acpi_install_exception_handler (
+ acpi_exception_handler handler)
+{
+ acpi_status status;
+
+
+ ACPI_FUNCTION_TRACE ("acpi_install_exception_handler");
+
+
+ status = acpi_ut_acquire_mutex (ACPI_MTX_EVENTS);
+ if (ACPI_FAILURE (status)) {
+ return_ACPI_STATUS (status);
+ }
+
+ /* Don't allow two handlers. */
+
+ if (acpi_gbl_exception_handler) {
+ status = AE_ALREADY_EXISTS;
+ goto cleanup;
+ }
+
+ /* Install the handler */
+
+ acpi_gbl_exception_handler = handler;
+
+cleanup:
+ (void) acpi_ut_release_mutex (ACPI_MTX_EVENTS);
+ return_ACPI_STATUS (status);
+}
+#endif /* ACPI_FUTURE_USAGE */
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_install_fixed_event_handler
+ *
+ * PARAMETERS: Event - Event type to enable.
+ * Handler - Pointer to the handler function for the
+ * event
+ * Context - Value passed to the handler on each GPE
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Saves the pointer to the handler function and then enables the
+ * event.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_install_fixed_event_handler (
+ u32 event,
+ acpi_event_handler handler,
+ void *context)
+{
+ acpi_status status;
+
+
+ ACPI_FUNCTION_TRACE ("acpi_install_fixed_event_handler");
+
+
+ /* Parameter validation */
+
+ if (event > ACPI_EVENT_MAX) {
+ return_ACPI_STATUS (AE_BAD_PARAMETER);
+ }
+
+ status = acpi_ut_acquire_mutex (ACPI_MTX_EVENTS);
+ if (ACPI_FAILURE (status)) {
+ return_ACPI_STATUS (status);
+ }
+
+ /* Don't allow two handlers. */
+
+ if (NULL != acpi_gbl_fixed_event_handlers[event].handler) {
+ status = AE_ALREADY_EXISTS;
+ goto cleanup;
+ }
+
+ /* Install the handler before enabling the event */
+
+ acpi_gbl_fixed_event_handlers[event].handler = handler;
+ acpi_gbl_fixed_event_handlers[event].context = context;
+
+ status = acpi_clear_event (event);
+ if (ACPI_SUCCESS(status))
+ status = acpi_enable_event (event, 0);
+ if (ACPI_FAILURE (status)) {
+ ACPI_DEBUG_PRINT ((ACPI_DB_WARN, "Could not enable fixed event.\n"));
+
+ /* Remove the handler */
+
+ acpi_gbl_fixed_event_handlers[event].handler = NULL;
+ acpi_gbl_fixed_event_handlers[event].context = NULL;
+ }
+ else {
+ ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
+ "Enabled fixed event %X, Handler=%p\n", event, handler));
+ }
+
+
+cleanup:
+ (void) acpi_ut_release_mutex (ACPI_MTX_EVENTS);
+ return_ACPI_STATUS (status);
+}
+EXPORT_SYMBOL(acpi_install_fixed_event_handler);
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_remove_fixed_event_handler
+ *
+ * PARAMETERS: Event - Event type to disable.
+ * Handler - Address of the handler
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Disables the event and unregisters the event handler.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_remove_fixed_event_handler (
+ u32 event,
+ acpi_event_handler handler)
+{
+ acpi_status status = AE_OK;
+
+
+ ACPI_FUNCTION_TRACE ("acpi_remove_fixed_event_handler");
+
+
+ /* Parameter validation */
+
+ if (event > ACPI_EVENT_MAX) {
+ return_ACPI_STATUS (AE_BAD_PARAMETER);
+ }
+
+ status = acpi_ut_acquire_mutex (ACPI_MTX_EVENTS);
+ if (ACPI_FAILURE (status)) {
+ return_ACPI_STATUS (status);
+ }
+
+ /* Disable the event before removing the handler */
+
+ status = acpi_disable_event (event, 0);
+
+ /* Always Remove the handler */
+
+ acpi_gbl_fixed_event_handlers[event].handler = NULL;
+ acpi_gbl_fixed_event_handlers[event].context = NULL;
+
+ if (ACPI_FAILURE (status)) {
+ ACPI_DEBUG_PRINT ((ACPI_DB_WARN,
+ "Could not write to fixed event enable register.\n"));
+ }
+ else {
+ ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Disabled fixed event %X.\n", event));
+ }
+
+ (void) acpi_ut_release_mutex (ACPI_MTX_EVENTS);
+ return_ACPI_STATUS (status);
+}
+EXPORT_SYMBOL(acpi_remove_fixed_event_handler);
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_install_notify_handler
+ *
+ * PARAMETERS: Device - The device for which notifies will be handled
+ * handler_type - The type of handler:
+ * ACPI_SYSTEM_NOTIFY: system_handler (00-7f)
+ * ACPI_DEVICE_NOTIFY: driver_handler (80-ff)
+ * ACPI_ALL_NOTIFY: both system and device
+ * Handler - Address of the handler
+ * Context - Value passed to the handler on each GPE
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Install a handler for notifies on an ACPI device
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_install_notify_handler (
+ acpi_handle device,
+ u32 handler_type,
+ acpi_notify_handler handler,
+ void *context)
+{
+ union acpi_operand_object *obj_desc;
+ union acpi_operand_object *notify_obj;
+ struct acpi_namespace_node *node;
+ acpi_status status;
+
+
+ ACPI_FUNCTION_TRACE ("acpi_install_notify_handler");
+
+
+ /* Parameter validation */
+
+ if ((!device) ||
+ (!handler) ||
+ (handler_type > ACPI_MAX_NOTIFY_HANDLER_TYPE)) {
+ return_ACPI_STATUS (AE_BAD_PARAMETER);
+ }
+
+ status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE);
+ if (ACPI_FAILURE (status)) {
+ return_ACPI_STATUS (status);
+ }
+
+ /* Convert and validate the device handle */
+
+ node = acpi_ns_map_handle_to_node (device);
+ if (!node) {
+ status = AE_BAD_PARAMETER;
+ goto unlock_and_exit;
+ }
+
+ /*
+ * Root Object:
+ * Registering a notify handler on the root object indicates that the
+ * caller wishes to receive notifications for all objects. Note that
+ * only one <external> global handler can be regsitered (per notify type).
+ */
+ if (device == ACPI_ROOT_OBJECT) {
+ /* Make sure the handler is not already installed */
+
+ if (((handler_type & ACPI_SYSTEM_NOTIFY) &&
+ acpi_gbl_system_notify.handler) ||
+ ((handler_type & ACPI_DEVICE_NOTIFY) &&
+ acpi_gbl_device_notify.handler)) {
+ status = AE_ALREADY_EXISTS;
+ goto unlock_and_exit;
+ }
+
+ if (handler_type & ACPI_SYSTEM_NOTIFY) {
+ acpi_gbl_system_notify.node = node;
+ acpi_gbl_system_notify.handler = handler;
+ acpi_gbl_system_notify.context = context;
+ }
+
+ if (handler_type & ACPI_DEVICE_NOTIFY) {
+ acpi_gbl_device_notify.node = node;
+ acpi_gbl_device_notify.handler = handler;
+ acpi_gbl_device_notify.context = context;
+ }
+
+ /* Global notify handler installed */
+ }
+
+ /*
+ * All Other Objects:
+ * Caller will only receive notifications specific to the target object.
+ * Note that only certain object types can receive notifications.
+ */
+ else {
+ /* Notifies allowed on this object? */
+
+ if (!acpi_ev_is_notify_object (node)) {
+ status = AE_TYPE;
+ goto unlock_and_exit;
+ }
+
+ /* Check for an existing internal object */
+
+ obj_desc = acpi_ns_get_attached_object (node);
+ if (obj_desc) {
+ /* Object exists - make sure there's no handler */
+
+ if (((handler_type & ACPI_SYSTEM_NOTIFY) &&
+ obj_desc->common_notify.system_notify) ||
+ ((handler_type & ACPI_DEVICE_NOTIFY) &&
+ obj_desc->common_notify.device_notify)) {
+ status = AE_ALREADY_EXISTS;
+ goto unlock_and_exit;
+ }
+ }
+ else {
+ /* Create a new object */
+
+ obj_desc = acpi_ut_create_internal_object (node->type);
+ if (!obj_desc) {
+ status = AE_NO_MEMORY;
+ goto unlock_and_exit;
+ }
+
+ /* Attach new object to the Node */
+
+ status = acpi_ns_attach_object (device, obj_desc, node->type);
+
+ /* Remove local reference to the object */
+
+ acpi_ut_remove_reference (obj_desc);
+ if (ACPI_FAILURE (status)) {
+ goto unlock_and_exit;
+ }
+ }
+
+ /* Install the handler */
+
+ notify_obj = acpi_ut_create_internal_object (ACPI_TYPE_LOCAL_NOTIFY);
+ if (!notify_obj) {
+ status = AE_NO_MEMORY;
+ goto unlock_and_exit;
+ }
+
+ notify_obj->notify.node = node;
+ notify_obj->notify.handler = handler;
+ notify_obj->notify.context = context;
+
+ if (handler_type & ACPI_SYSTEM_NOTIFY) {
+ obj_desc->common_notify.system_notify = notify_obj;
+ }
+
+ if (handler_type & ACPI_DEVICE_NOTIFY) {
+ obj_desc->common_notify.device_notify = notify_obj;
+ }
+
+ if (handler_type == ACPI_ALL_NOTIFY) {
+ /* Extra ref if installed in both */
+
+ acpi_ut_add_reference (notify_obj);
+ }
+ }
+
+
+unlock_and_exit:
+ (void) acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
+ return_ACPI_STATUS (status);
+}
+EXPORT_SYMBOL(acpi_install_notify_handler);
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_remove_notify_handler
+ *
+ * PARAMETERS: Device - The device for which notifies will be handled
+ * handler_type - The type of handler:
+ * ACPI_SYSTEM_NOTIFY: system_handler (00-7f)
+ * ACPI_DEVICE_NOTIFY: driver_handler (80-ff)
+ * ACPI_ALL_NOTIFY: both system and device
+ * Handler - Address of the handler
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Remove a handler for notifies on an ACPI device
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_remove_notify_handler (
+ acpi_handle device,
+ u32 handler_type,
+ acpi_notify_handler handler)
+{
+ union acpi_operand_object *notify_obj;
+ union acpi_operand_object *obj_desc;
+ struct acpi_namespace_node *node;
+ acpi_status status;
+
+
+ ACPI_FUNCTION_TRACE ("acpi_remove_notify_handler");
+
+
+ /* Parameter validation */
+
+ if ((!device) ||
+ (!handler) ||
+ (handler_type > ACPI_MAX_NOTIFY_HANDLER_TYPE)) {
+ return_ACPI_STATUS (AE_BAD_PARAMETER);
+ }
+
+ status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE);
+ if (ACPI_FAILURE (status)) {
+ return_ACPI_STATUS (status);
+ }
+
+ /* Convert and validate the device handle */
+
+ node = acpi_ns_map_handle_to_node (device);
+ if (!node) {
+ status = AE_BAD_PARAMETER;
+ goto unlock_and_exit;
+ }
+
+ /* Root Object */
+
+ if (device == ACPI_ROOT_OBJECT) {
+ ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Removing notify handler for ROOT object.\n"));
+
+ if (((handler_type & ACPI_SYSTEM_NOTIFY) &&
+ !acpi_gbl_system_notify.handler) ||
+ ((handler_type & ACPI_DEVICE_NOTIFY) &&
+ !acpi_gbl_device_notify.handler)) {
+ status = AE_NOT_EXIST;
+ goto unlock_and_exit;
+ }
+
+ /* Make sure all deferred tasks are completed */
+
+ (void) acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
+ acpi_os_wait_events_complete(NULL);
+ status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE);
+ if (ACPI_FAILURE (status)) {
+ return_ACPI_STATUS (status);
+ }
+
+ if (handler_type & ACPI_SYSTEM_NOTIFY) {
+ acpi_gbl_system_notify.node = NULL;
+ acpi_gbl_system_notify.handler = NULL;
+ acpi_gbl_system_notify.context = NULL;
+ }
+
+ if (handler_type & ACPI_DEVICE_NOTIFY) {
+ acpi_gbl_device_notify.node = NULL;
+ acpi_gbl_device_notify.handler = NULL;
+ acpi_gbl_device_notify.context = NULL;
+ }
+ }
+
+ /* All Other Objects */
+
+ else {
+ /* Notifies allowed on this object? */
+
+ if (!acpi_ev_is_notify_object (node)) {
+ status = AE_TYPE;
+ goto unlock_and_exit;
+ }
+
+ /* Check for an existing internal object */
+
+ obj_desc = acpi_ns_get_attached_object (node);
+ if (!obj_desc) {
+ status = AE_NOT_EXIST;
+ 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)) {
+ status = AE_BAD_PARAMETER;
+ goto unlock_and_exit;
+ }
+ /* Make sure all deferred tasks are completed */
+
+ (void) acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
+ acpi_os_wait_events_complete(NULL);
+ status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE);
+ if (ACPI_FAILURE (status)) {
+ return_ACPI_STATUS (status);
+ }
+
+ /* Remove the handler */
+ obj_desc->common_notify.system_notify = NULL;
+ acpi_ut_remove_reference (notify_obj);
+ }
+
+ if (handler_type & ACPI_DEVICE_NOTIFY) {
+ notify_obj = obj_desc->common_notify.device_notify;
+ if ((!notify_obj) ||
+ (notify_obj->notify.handler != handler)) {
+ status = AE_BAD_PARAMETER;
+ goto unlock_and_exit;
+ }
+ /* Make sure all deferred tasks are completed */
+
+ (void) acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
+ acpi_os_wait_events_complete(NULL);
+ status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE);
+ if (ACPI_FAILURE (status)) {
+ return_ACPI_STATUS (status);
+ }
+
+ /* Remove the handler */
+ obj_desc->common_notify.device_notify = NULL;
+ acpi_ut_remove_reference (notify_obj);
+ }
+ }
+
+
+unlock_and_exit:
+ (void) acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
+ return_ACPI_STATUS (status);
+}
+EXPORT_SYMBOL(acpi_remove_notify_handler);
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_install_gpe_handler
+ *
+ * PARAMETERS: gpe_number - The GPE number within the GPE block
+ * gpe_block - GPE block (NULL == FADT GPEs)
+ * Type - Whether this GPE should be treated as an
+ * edge- or level-triggered interrupt.
+ * Address - Address of the handler
+ * Context - Value passed to the handler on each GPE
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Install a handler for a General Purpose Event.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_install_gpe_handler (
+ acpi_handle gpe_device,
+ u32 gpe_number,
+ u32 type,
+ acpi_event_handler address,
+ void *context)
+{
+ struct acpi_gpe_event_info *gpe_event_info;
+ struct acpi_handler_info *handler;
+ acpi_status status;
+
+
+ ACPI_FUNCTION_TRACE ("acpi_install_gpe_handler");
+
+
+ /* Parameter validation */
+
+ if ((!address) || (type > ACPI_GPE_XRUPT_TYPE_MASK)) {
+ return_ACPI_STATUS (AE_BAD_PARAMETER);
+ }
+
+ status = acpi_ut_acquire_mutex (ACPI_MTX_EVENTS);
+ if (ACPI_FAILURE (status)) {
+ return_ACPI_STATUS (status);
+ }
+
+ /* Ensure that we have a valid GPE number */
+
+ gpe_event_info = acpi_ev_get_gpe_event_info (gpe_device, gpe_number);
+ if (!gpe_event_info) {
+ status = AE_BAD_PARAMETER;
+ goto unlock_and_exit;
+ }
+
+ /* Make sure that there isn't a handler there already */
+
+ if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) == ACPI_GPE_DISPATCH_HANDLER) {
+ status = AE_ALREADY_EXISTS;
+ goto unlock_and_exit;
+ }
+
+ /* Allocate and init handler object */
+
+ handler = ACPI_MEM_CALLOCATE (sizeof (struct acpi_handler_info));
+ if (!handler) {
+ status = AE_NO_MEMORY;
+ goto unlock_and_exit;
+ }
+
+ handler->address = address;
+ handler->context = context;
+ handler->method_node = gpe_event_info->dispatch.method_node;
+
+ /* Disable the GPE before installing the handler */
+
+ status = acpi_ev_disable_gpe (gpe_event_info);
+ if (ACPI_FAILURE (status)) {
+ goto unlock_and_exit;
+ }
+
+ /* Install the handler */
+
+ acpi_os_acquire_lock (acpi_gbl_gpe_lock, ACPI_NOT_ISR);
+ gpe_event_info->dispatch.handler = handler;
+
+ /* Setup up dispatch flags to indicate handler (vs. method) */
+
+ gpe_event_info->flags &= ~(ACPI_GPE_XRUPT_TYPE_MASK | ACPI_GPE_DISPATCH_MASK); /* Clear bits */
+ gpe_event_info->flags |= (u8) (type | ACPI_GPE_DISPATCH_HANDLER);
+
+ acpi_os_release_lock (acpi_gbl_gpe_lock, ACPI_NOT_ISR);
+
+
+unlock_and_exit:
+ (void) acpi_ut_release_mutex (ACPI_MTX_EVENTS);
+ return_ACPI_STATUS (status);
+}
+EXPORT_SYMBOL(acpi_install_gpe_handler);
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_remove_gpe_handler
+ *
+ * PARAMETERS: gpe_number - The event to remove a handler
+ * gpe_block - GPE block (NULL == FADT GPEs)
+ * Address - Address of the handler
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Remove a handler for a General Purpose acpi_event.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_remove_gpe_handler (
+ acpi_handle gpe_device,
+ u32 gpe_number,
+ acpi_event_handler address)
+{
+ struct acpi_gpe_event_info *gpe_event_info;
+ struct acpi_handler_info *handler;
+ acpi_status status;
+
+
+ ACPI_FUNCTION_TRACE ("acpi_remove_gpe_handler");
+
+
+ /* Parameter validation */
+
+ if (!address) {
+ return_ACPI_STATUS (AE_BAD_PARAMETER);
+ }
+
+ status = acpi_ut_acquire_mutex (ACPI_MTX_EVENTS);
+ if (ACPI_FAILURE (status)) {
+ return_ACPI_STATUS (status);
+ }
+
+ /* Ensure that we have a valid GPE number */
+
+ gpe_event_info = acpi_ev_get_gpe_event_info (gpe_device, gpe_number);
+ if (!gpe_event_info) {
+ status = AE_BAD_PARAMETER;
+ goto unlock_and_exit;
+ }
+
+ /* Make sure that a handler is indeed installed */
+
+ if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) != ACPI_GPE_DISPATCH_HANDLER) {
+ status = AE_NOT_EXIST;
+ goto unlock_and_exit;
+ }
+
+ /* Make sure that the installed handler is the same */
+
+ if (gpe_event_info->dispatch.handler->address != address) {
+ status = AE_BAD_PARAMETER;
+ goto unlock_and_exit;
+ }
+
+ /* Disable the GPE before removing the handler */
+
+ status = acpi_ev_disable_gpe (gpe_event_info);
+ if (ACPI_FAILURE (status)) {
+ goto unlock_and_exit;
+ }
+
+ /* Make sure all deferred tasks are completed */
+
+ (void) acpi_ut_release_mutex (ACPI_MTX_EVENTS);
+ acpi_os_wait_events_complete(NULL);
+ status = acpi_ut_acquire_mutex (ACPI_MTX_EVENTS);
+ if (ACPI_FAILURE (status)) {
+ return_ACPI_STATUS (status);
+ }
+
+ /* Remove the handler */
+
+ acpi_os_acquire_lock (acpi_gbl_gpe_lock, ACPI_NOT_ISR);
+ handler = gpe_event_info->dispatch.handler;
+
+ /* Restore Method node (if any), set dispatch flags */
+
+ gpe_event_info->dispatch.method_node = handler->method_node;
+ gpe_event_info->flags &= ~ACPI_GPE_DISPATCH_MASK; /* Clear bits */
+ if (handler->method_node) {
+ gpe_event_info->flags |= ACPI_GPE_DISPATCH_METHOD;
+ }
+ acpi_os_release_lock (acpi_gbl_gpe_lock, ACPI_NOT_ISR);
+
+ /* Now we can free the handler object */
+
+ ACPI_MEM_FREE (handler);
+
+
+unlock_and_exit:
+ (void) acpi_ut_release_mutex (ACPI_MTX_EVENTS);
+ return_ACPI_STATUS (status);
+}
+EXPORT_SYMBOL(acpi_remove_gpe_handler);
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_acquire_global_lock
+ *
+ * PARAMETERS: Timeout - How long the caller is willing to wait
+ * out_handle - A handle to the lock if acquired
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Acquire the ACPI Global Lock
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_acquire_global_lock (
+ u16 timeout,
+ u32 *handle)
+{
+ acpi_status status;
+
+
+ if (!handle) {
+ return (AE_BAD_PARAMETER);
+ }
+
+ status = acpi_ex_enter_interpreter ();
+ if (ACPI_FAILURE (status)) {
+ return (status);
+ }
+
+ status = acpi_ev_acquire_global_lock (timeout);
+ acpi_ex_exit_interpreter ();
+
+ if (ACPI_SUCCESS (status)) {
+ acpi_gbl_global_lock_handle++;
+ *handle = acpi_gbl_global_lock_handle;
+ }
+
+ return (status);
+}
+EXPORT_SYMBOL(acpi_acquire_global_lock);
+
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_release_global_lock
+ *
+ * PARAMETERS: Handle - Returned from acpi_acquire_global_lock
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Release the ACPI Global Lock
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_release_global_lock (
+ u32 handle)
+{
+ acpi_status status;
+
+
+ if (handle != acpi_gbl_global_lock_handle) {
+ return (AE_NOT_ACQUIRED);
+ }
+
+ status = acpi_ev_release_global_lock ();
+ return (status);
+}
+EXPORT_SYMBOL(acpi_release_global_lock);
+