1 files changed, 778 insertions, 0 deletions

diff --git a/drivers/acpi/events/evxfevnt.c b/drivers/acpi/events/evxfevnt.c
new file mode 100644
index 000000000000..fa8d5f25be62
--- /dev/null
+++ b/drivers/acpi/events/evxfevnt.c
@@ -0,0 +1,778 @@
+/******************************************************************************
+ *
+ * Module Name: evxfevnt - External Interfaces, ACPI event disable/enable
+ *
+ *****************************************************************************/
+
+/*
+ * 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/acevents.h>
+#include <acpi/acnamesp.h>
+
+#define _COMPONENT          ACPI_EVENTS
+         ACPI_MODULE_NAME    ("evxfevnt")
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_enable
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Transfers the system into ACPI mode.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_enable (void)
+{
+        acpi_status                     status = AE_OK;
+
+
+        ACPI_FUNCTION_TRACE ("acpi_enable");
+
+
+        /* Make sure we have the FADT*/
+
+        if (!acpi_gbl_FADT) {
+                ACPI_DEBUG_PRINT ((ACPI_DB_WARN, "No FADT information present!\n"));
+                return_ACPI_STATUS (AE_NO_ACPI_TABLES);
+        }
+
+        if (acpi_hw_get_mode() == ACPI_SYS_MODE_ACPI) {
+                ACPI_DEBUG_PRINT ((ACPI_DB_INIT, "System is already in ACPI mode\n"));
+        }
+        else {
+                /* Transition to ACPI mode */
+
+                status = acpi_hw_set_mode (ACPI_SYS_MODE_ACPI);
+                if (ACPI_FAILURE (status)) {
+                        ACPI_REPORT_ERROR (("Could not transition to ACPI mode.\n"));
+                        return_ACPI_STATUS (status);
+                }
+
+                ACPI_DEBUG_PRINT ((ACPI_DB_INIT, "Transition to ACPI mode successful\n"));
+        }
+
+        return_ACPI_STATUS (status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_disable
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Transfers the system into LEGACY mode.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_disable (void)
+{
+        acpi_status                     status = AE_OK;
+
+
+        ACPI_FUNCTION_TRACE ("acpi_disable");
+
+
+        if (!acpi_gbl_FADT) {
+                ACPI_DEBUG_PRINT ((ACPI_DB_WARN, "No FADT information present!\n"));
+                return_ACPI_STATUS (AE_NO_ACPI_TABLES);
+        }
+
+        if (acpi_hw_get_mode() == ACPI_SYS_MODE_LEGACY) {
+                ACPI_DEBUG_PRINT ((ACPI_DB_INIT, "System is already in legacy (non-ACPI) mode\n"));
+        }
+        else {
+                /* Transition to LEGACY mode */
+
+                status = acpi_hw_set_mode (ACPI_SYS_MODE_LEGACY);
+
+                if (ACPI_FAILURE (status)) {
+                        ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Could not exit ACPI mode to legacy mode"));
+                        return_ACPI_STATUS (status);
+                }
+
+                ACPI_DEBUG_PRINT ((ACPI_DB_INIT, "ACPI mode disabled\n"));
+        }
+
+        return_ACPI_STATUS (status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_enable_event
+ *
+ * PARAMETERS:  Event           - The fixed eventto be enabled
+ *              Flags           - Reserved
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Enable an ACPI event (fixed)
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_enable_event (
+        u32                             event,
+        u32                             flags)
+{
+        acpi_status                     status = AE_OK;
+        u32                             value;
+
+
+        ACPI_FUNCTION_TRACE ("acpi_enable_event");
+
+
+        /* Decode the Fixed Event */
+
+        if (event > ACPI_EVENT_MAX) {
+                return_ACPI_STATUS (AE_BAD_PARAMETER);
+        }
+
+        /*
+         * Enable the requested fixed event (by writing a one to the
+         * enable register bit)
+         */
+        status = acpi_set_register (acpi_gbl_fixed_event_info[event].enable_register_id,
+                         1, ACPI_MTX_LOCK);
+        if (ACPI_FAILURE (status)) {
+                return_ACPI_STATUS (status);
+        }
+
+        /* Make sure that the hardware responded */
+
+        status = acpi_get_register (acpi_gbl_fixed_event_info[event].enable_register_id,
+                          &value, ACPI_MTX_LOCK);
+        if (ACPI_FAILURE (status)) {
+                return_ACPI_STATUS (status);
+        }
+
+        if (value != 1) {
+                ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
+                        "Could not enable %s event\n", acpi_ut_get_event_name (event)));
+                return_ACPI_STATUS (AE_NO_HARDWARE_RESPONSE);
+        }
+
+        return_ACPI_STATUS (status);
+}
+EXPORT_SYMBOL(acpi_enable_event);
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_set_gpe_type
+ *
+ * PARAMETERS:  gpe_device      - Parent GPE Device
+ *              gpe_number      - GPE level within the GPE block
+ *              Type            - New GPE type
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Enable an ACPI event (general purpose)
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_set_gpe_type (
+        acpi_handle                     gpe_device,
+        u32                             gpe_number,
+        u8                              type)
+{
+        acpi_status                     status = AE_OK;
+        struct acpi_gpe_event_info      *gpe_event_info;
+
+
+        ACPI_FUNCTION_TRACE ("acpi_set_gpe_type");
+
+
+        /* 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;
+        }
+
+        if ((gpe_event_info->flags & ACPI_GPE_TYPE_MASK) == type) {
+                return_ACPI_STATUS (AE_OK);
+        }
+
+        /* Set the new type (will disable GPE if currently enabled) */
+
+        status = acpi_ev_set_gpe_type (gpe_event_info, type);
+
+unlock_and_exit:
+        return_ACPI_STATUS (status);
+}
+EXPORT_SYMBOL(acpi_set_gpe_type);
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_enable_gpe
+ *
+ * PARAMETERS:  gpe_device      - Parent GPE Device
+ *              gpe_number      - GPE level within the GPE block
+ *              Flags           - Just enable, or also wake enable?
+ *                                Called from ISR or not
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Enable an ACPI event (general purpose)
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_enable_gpe (
+        acpi_handle                     gpe_device,
+        u32                             gpe_number,
+        u32                             flags)
+{
+        acpi_status                     status = AE_OK;
+        struct acpi_gpe_event_info      *gpe_event_info;
+
+
+        ACPI_FUNCTION_TRACE ("acpi_enable_gpe");
+
+
+        /* Use semaphore lock if not executing at interrupt level */
+
+        if (flags & ACPI_NOT_ISR) {
+                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;
+        }
+
+        /* Perform the enable */
+
+        status = acpi_ev_enable_gpe (gpe_event_info, TRUE);
+
+unlock_and_exit:
+        if (flags & ACPI_NOT_ISR) {
+                (void) acpi_ut_release_mutex (ACPI_MTX_EVENTS);
+        }
+        return_ACPI_STATUS (status);
+}
+EXPORT_SYMBOL(acpi_enable_gpe);
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_disable_gpe
+ *
+ * PARAMETERS:  gpe_device      - Parent GPE Device
+ *              gpe_number      - GPE level within the GPE block
+ *              Flags           - Just disable, or also wake disable?
+ *                                Called from ISR or not
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Disable an ACPI event (general purpose)
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_disable_gpe (
+        acpi_handle                     gpe_device,
+        u32                             gpe_number,
+        u32                             flags)
+{
+        acpi_status                     status = AE_OK;
+        struct acpi_gpe_event_info      *gpe_event_info;
+
+
+        ACPI_FUNCTION_TRACE ("acpi_disable_gpe");
+
+
+        /* Use semaphore lock if not executing at interrupt level */
+
+        if (flags & ACPI_NOT_ISR) {
+                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;
+        }
+
+        status = acpi_ev_disable_gpe (gpe_event_info);
+
+unlock_and_exit:
+        if (flags & ACPI_NOT_ISR) {
+                (void) acpi_ut_release_mutex (ACPI_MTX_EVENTS);
+        }
+        return_ACPI_STATUS (status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_disable_event
+ *
+ * PARAMETERS:  Event           - The fixed eventto be enabled
+ *              Flags           - Reserved
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Disable an ACPI event (fixed)
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_disable_event (
+        u32                             event,
+        u32                             flags)
+{
+        acpi_status                     status = AE_OK;
+        u32                             value;
+
+
+        ACPI_FUNCTION_TRACE ("acpi_disable_event");
+
+
+        /* Decode the Fixed Event */
+
+        if (event > ACPI_EVENT_MAX) {
+                return_ACPI_STATUS (AE_BAD_PARAMETER);
+        }
+
+        /*
+         * Disable the requested fixed event (by writing a zero to the
+         * enable register bit)
+         */
+        status = acpi_set_register (acpi_gbl_fixed_event_info[event].enable_register_id,
+                         0, ACPI_MTX_LOCK);
+        if (ACPI_FAILURE (status)) {
+                return_ACPI_STATUS (status);
+        }
+
+        status = acpi_get_register (acpi_gbl_fixed_event_info[event].enable_register_id,
+                         &value, ACPI_MTX_LOCK);
+        if (ACPI_FAILURE (status)) {
+                return_ACPI_STATUS (status);
+        }
+
+        if (value != 0) {
+                ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
+                        "Could not disable %s events\n", acpi_ut_get_event_name (event)));
+                return_ACPI_STATUS (AE_NO_HARDWARE_RESPONSE);
+        }
+
+        return_ACPI_STATUS (status);
+}
+EXPORT_SYMBOL(acpi_disable_event);
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_clear_event
+ *
+ * PARAMETERS:  Event           - The fixed event to be cleared
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Clear an ACPI event (fixed)
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_clear_event (
+        u32                             event)
+{
+        acpi_status                     status = AE_OK;
+
+
+        ACPI_FUNCTION_TRACE ("acpi_clear_event");
+
+
+        /* Decode the Fixed Event */
+
+        if (event > ACPI_EVENT_MAX) {
+                return_ACPI_STATUS (AE_BAD_PARAMETER);
+        }
+
+        /*
+         * Clear the requested fixed event (By writing a one to the
+         * status register bit)
+         */
+        status = acpi_set_register (acpi_gbl_fixed_event_info[event].status_register_id,
+                        1, ACPI_MTX_LOCK);
+
+        return_ACPI_STATUS (status);
+}
+EXPORT_SYMBOL(acpi_clear_event);
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_clear_gpe
+ *
+ * PARAMETERS:  gpe_device      - Parent GPE Device
+ *              gpe_number      - GPE level within the GPE block
+ *              Flags           - Called from an ISR or not
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Clear an ACPI event (general purpose)
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_clear_gpe (
+        acpi_handle                     gpe_device,
+        u32                             gpe_number,
+        u32                             flags)
+{
+        acpi_status                     status = AE_OK;
+        struct acpi_gpe_event_info      *gpe_event_info;
+
+
+        ACPI_FUNCTION_TRACE ("acpi_clear_gpe");
+
+
+        /* Use semaphore lock if not executing at interrupt level */
+
+        if (flags & ACPI_NOT_ISR) {
+                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;
+        }
+
+        status = acpi_hw_clear_gpe (gpe_event_info);
+
+unlock_and_exit:
+        if (flags & ACPI_NOT_ISR) {
+                (void) acpi_ut_release_mutex (ACPI_MTX_EVENTS);
+        }
+        return_ACPI_STATUS (status);
+}
+
+
+#ifdef ACPI_FUTURE_USAGE
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_get_event_status
+ *
+ * PARAMETERS:  Event           - The fixed event
+ *              Event Status    - Where the current status of the event will
+ *                                be returned
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Obtains and returns the current status of the event
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_get_event_status (
+        u32                             event,
+        acpi_event_status               *event_status)
+{
+        acpi_status                     status = AE_OK;
+
+
+        ACPI_FUNCTION_TRACE ("acpi_get_event_status");
+
+
+        if (!event_status) {
+                return_ACPI_STATUS (AE_BAD_PARAMETER);
+        }
+
+        /* Decode the Fixed Event */
+
+        if (event > ACPI_EVENT_MAX) {
+                return_ACPI_STATUS (AE_BAD_PARAMETER);
+        }
+
+        /* Get the status of the requested fixed event */
+
+        status = acpi_get_register (acpi_gbl_fixed_event_info[event].status_register_id,
+                          event_status, ACPI_MTX_LOCK);
+
+        return_ACPI_STATUS (status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_get_gpe_status
+ *
+ * PARAMETERS:  gpe_device      - Parent GPE Device
+ *              gpe_number      - GPE level within the GPE block
+ *              Flags           - Called from an ISR or not
+ *              Event Status    - Where the current status of the event will
+ *                                be returned
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Get status of an event (general purpose)
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_get_gpe_status (
+        acpi_handle                     gpe_device,
+        u32                             gpe_number,
+        u32                             flags,
+        acpi_event_status               *event_status)
+{
+        acpi_status                     status = AE_OK;
+        struct acpi_gpe_event_info      *gpe_event_info;
+
+
+        ACPI_FUNCTION_TRACE ("acpi_get_gpe_status");
+
+
+        /* Use semaphore lock if not executing at interrupt level */
+
+        if (flags & ACPI_NOT_ISR) {
+                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;
+        }
+
+        /* Obtain status on the requested GPE number */
+
+        status = acpi_hw_get_gpe_status (gpe_event_info, event_status);
+
+unlock_and_exit:
+        if (flags & ACPI_NOT_ISR) {
+                (void) acpi_ut_release_mutex (ACPI_MTX_EVENTS);
+        }
+        return_ACPI_STATUS (status);
+}
+#endif  /*  ACPI_FUTURE_USAGE  */
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_install_gpe_block
+ *
+ * PARAMETERS:  gpe_device          - Handle to the parent GPE Block Device
+ *              gpe_block_address   - Address and space_iD
+ *              register_count      - Number of GPE register pairs in the block
+ *              interrupt_level     - H/W interrupt for the block
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Create and Install a block of GPE registers
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_install_gpe_block (
+        acpi_handle                     gpe_device,
+        struct acpi_generic_address     *gpe_block_address,
+        u32                             register_count,
+        u32                             interrupt_level)
+{
+        acpi_status                     status;
+        union acpi_operand_object       *obj_desc;
+        struct acpi_namespace_node      *node;
+        struct acpi_gpe_block_info      *gpe_block;
+
+
+        ACPI_FUNCTION_TRACE ("acpi_install_gpe_block");
+
+
+        if ((!gpe_device)      ||
+                (!gpe_block_address) ||
+                (!register_count)) {
+                return_ACPI_STATUS (AE_BAD_PARAMETER);
+        }
+
+        status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE);
+        if (ACPI_FAILURE (status)) {
+                return (status);
+        }
+
+        node = acpi_ns_map_handle_to_node (gpe_device);
+        if (!node) {
+                status = AE_BAD_PARAMETER;
+                goto unlock_and_exit;
+        }
+
+        /*
+         * For user-installed GPE Block Devices, the gpe_block_base_number
+         * is always zero
+         */
+        status = acpi_ev_create_gpe_block (node, gpe_block_address, register_count,
+                          0, interrupt_level, &gpe_block);
+        if (ACPI_FAILURE (status)) {
+                goto unlock_and_exit;
+        }
+
+        /* Get the device_object attached to the node */
+
+        obj_desc = acpi_ns_get_attached_object (node);
+        if (!obj_desc) {
+                /* No object, create a new one */
+
+                obj_desc = acpi_ut_create_internal_object (ACPI_TYPE_DEVICE);
+                if (!obj_desc) {
+                        status = AE_NO_MEMORY;
+                        goto unlock_and_exit;
+                }
+
+                status = acpi_ns_attach_object (node, obj_desc, ACPI_TYPE_DEVICE);
+
+                /* Remove local reference to the object */
+
+                acpi_ut_remove_reference (obj_desc);
+
+                if (ACPI_FAILURE (status)) {
+                        goto unlock_and_exit;
+                }
+        }
+
+        /* Install the GPE block in the device_object */
+
+        obj_desc->device.gpe_block = gpe_block;
+
+
+unlock_and_exit:
+        (void) acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
+        return_ACPI_STATUS (status);
+}
+EXPORT_SYMBOL(acpi_install_gpe_block);
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_remove_gpe_block
+ *
+ * PARAMETERS:  gpe_device          - Handle to the parent GPE Block Device
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Remove a previously installed block of GPE registers
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_remove_gpe_block (
+        acpi_handle                     gpe_device)
+{
+        union acpi_operand_object       *obj_desc;
+        acpi_status                     status;
+        struct acpi_namespace_node      *node;
+
+
+        ACPI_FUNCTION_TRACE ("acpi_remove_gpe_block");
+
+
+        if (!gpe_device) {
+                return_ACPI_STATUS (AE_BAD_PARAMETER);
+        }
+
+        status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE);
+        if (ACPI_FAILURE (status)) {
+                return (status);
+        }
+
+        node = acpi_ns_map_handle_to_node (gpe_device);
+        if (!node) {
+                status = AE_BAD_PARAMETER;
+                goto unlock_and_exit;
+        }
+
+        /* Get the device_object attached to the node */
+
+        obj_desc = acpi_ns_get_attached_object (node);
+        if (!obj_desc ||
+                !obj_desc->device.gpe_block) {
+                return_ACPI_STATUS (AE_NULL_OBJECT);
+        }
+
+        /* Delete the GPE block (but not the device_object) */
+
+        status = acpi_ev_delete_gpe_block (obj_desc->device.gpe_block);
+        if (ACPI_SUCCESS (status)) {
+                obj_desc->device.gpe_block = NULL;
+        }
+
+unlock_and_exit:
+        (void) acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
+        return_ACPI_STATUS (status);
+}
+EXPORT_SYMBOL(acpi_remove_gpe_block);