44f6c01242
Fixed three cases in the interpreter where an "index" argument to an ASL function was still (internally) 32 bits instead of the required 64 bits. This was the Index argument to the Index, Mid, and Match operators. The "strupr" function is now permanently local (acpi_ut_strupr), since this is not a POSIX-defined function and not present in most kernel-level C libraries. References to the C library strupr function have been removed from the headers. Completed the deployment of static functions/prototypes. All prototypes with the static attribute have been moved from the headers to the owning C file. ACPICA 20050329 from Bob Moore An error is now generated if an attempt is made to create a Buffer Field of length zero (A CreateField with a length operand of zero.) The interpreter now issues a warning whenever executable code at the module level is detected during ACPI table load. This will give some idea of the prevalence of this type of code. Implemented support for references to named objects (other than control methods) within package objects. Enhanced package object output for the debug object. Package objects are now completely dumped, showing all elements. Enhanced miscellaneous object output for the debug object. Any object can now be written to the debug object (for example, a device object can be written, and the type of the object will be displayed.) The "static" qualifier has been added to all local functions across the core subsystem. The number of "long" lines (> 80 chars) within the source has been significantly reduced, by about 1/3. Cleaned up all header files to ensure that all CA/iASL functions are prototyped (even static functions) and the formatting is consistent. Two new header files have been added, acopcode.h and acnames.h. Removed several obsolete functions that were no longer used. Signed-off-by: Len Brown <len.brown@intel.com>
840 lines
23 KiB
C
840 lines
23 KiB
C
/******************************************************************************
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*
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* Module Name: evxface - External interfaces for ACPI events
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2005, R. Byron Moore
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*/
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#include <linux/module.h>
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#include <acpi/acpi.h>
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#include <acpi/acnamesp.h>
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#include <acpi/acevents.h>
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#include <acpi/acinterp.h>
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#define _COMPONENT ACPI_EVENTS
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ACPI_MODULE_NAME ("evxface")
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/*******************************************************************************
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*
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* FUNCTION: acpi_install_exception_handler
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*
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* PARAMETERS: Handler - Pointer to the handler function for the
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* event
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*
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* RETURN: Status
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*
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* DESCRIPTION: Saves the pointer to the handler function
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*
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******************************************************************************/
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#ifdef ACPI_FUTURE_USAGE
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acpi_status
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acpi_install_exception_handler (
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acpi_exception_handler handler)
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{
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acpi_status status;
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ACPI_FUNCTION_TRACE ("acpi_install_exception_handler");
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status = acpi_ut_acquire_mutex (ACPI_MTX_EVENTS);
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if (ACPI_FAILURE (status)) {
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return_ACPI_STATUS (status);
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}
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/* Don't allow two handlers. */
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if (acpi_gbl_exception_handler) {
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status = AE_ALREADY_EXISTS;
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goto cleanup;
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}
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/* Install the handler */
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acpi_gbl_exception_handler = handler;
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cleanup:
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(void) acpi_ut_release_mutex (ACPI_MTX_EVENTS);
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return_ACPI_STATUS (status);
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}
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#endif /* ACPI_FUTURE_USAGE */
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/*******************************************************************************
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*
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* FUNCTION: acpi_install_fixed_event_handler
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*
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* PARAMETERS: Event - Event type to enable.
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* Handler - Pointer to the handler function for the
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* event
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* Context - Value passed to the handler on each GPE
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*
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* RETURN: Status
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*
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* DESCRIPTION: Saves the pointer to the handler function and then enables the
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* event.
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*
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******************************************************************************/
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acpi_status
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acpi_install_fixed_event_handler (
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u32 event,
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acpi_event_handler handler,
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void *context)
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{
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acpi_status status;
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ACPI_FUNCTION_TRACE ("acpi_install_fixed_event_handler");
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/* Parameter validation */
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if (event > ACPI_EVENT_MAX) {
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return_ACPI_STATUS (AE_BAD_PARAMETER);
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}
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status = acpi_ut_acquire_mutex (ACPI_MTX_EVENTS);
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if (ACPI_FAILURE (status)) {
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return_ACPI_STATUS (status);
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}
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/* Don't allow two handlers. */
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if (NULL != acpi_gbl_fixed_event_handlers[event].handler) {
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status = AE_ALREADY_EXISTS;
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goto cleanup;
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}
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/* Install the handler before enabling the event */
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acpi_gbl_fixed_event_handlers[event].handler = handler;
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acpi_gbl_fixed_event_handlers[event].context = context;
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status = acpi_clear_event (event);
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if (ACPI_SUCCESS(status))
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status = acpi_enable_event (event, 0);
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if (ACPI_FAILURE (status)) {
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ACPI_DEBUG_PRINT ((ACPI_DB_WARN, "Could not enable fixed event.\n"));
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/* Remove the handler */
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acpi_gbl_fixed_event_handlers[event].handler = NULL;
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acpi_gbl_fixed_event_handlers[event].context = NULL;
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}
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else {
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ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
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"Enabled fixed event %X, Handler=%p\n", event, handler));
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}
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cleanup:
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(void) acpi_ut_release_mutex (ACPI_MTX_EVENTS);
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return_ACPI_STATUS (status);
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}
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EXPORT_SYMBOL(acpi_install_fixed_event_handler);
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/*******************************************************************************
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*
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* FUNCTION: acpi_remove_fixed_event_handler
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*
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* PARAMETERS: Event - Event type to disable.
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* Handler - Address of the handler
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*
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* RETURN: Status
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*
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* DESCRIPTION: Disables the event and unregisters the event handler.
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*
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******************************************************************************/
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acpi_status
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acpi_remove_fixed_event_handler (
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u32 event,
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acpi_event_handler handler)
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{
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acpi_status status = AE_OK;
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ACPI_FUNCTION_TRACE ("acpi_remove_fixed_event_handler");
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/* Parameter validation */
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if (event > ACPI_EVENT_MAX) {
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return_ACPI_STATUS (AE_BAD_PARAMETER);
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}
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status = acpi_ut_acquire_mutex (ACPI_MTX_EVENTS);
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if (ACPI_FAILURE (status)) {
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return_ACPI_STATUS (status);
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}
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/* Disable the event before removing the handler */
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status = acpi_disable_event (event, 0);
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/* Always Remove the handler */
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acpi_gbl_fixed_event_handlers[event].handler = NULL;
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acpi_gbl_fixed_event_handlers[event].context = NULL;
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if (ACPI_FAILURE (status)) {
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ACPI_DEBUG_PRINT ((ACPI_DB_WARN,
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"Could not write to fixed event enable register.\n"));
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}
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else {
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ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Disabled fixed event %X.\n", event));
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}
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(void) acpi_ut_release_mutex (ACPI_MTX_EVENTS);
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return_ACPI_STATUS (status);
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}
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EXPORT_SYMBOL(acpi_remove_fixed_event_handler);
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/*******************************************************************************
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*
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* FUNCTION: acpi_install_notify_handler
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*
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* PARAMETERS: Device - The device for which notifies will be handled
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* handler_type - The type of handler:
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* ACPI_SYSTEM_NOTIFY: system_handler (00-7f)
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* ACPI_DEVICE_NOTIFY: driver_handler (80-ff)
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* ACPI_ALL_NOTIFY: both system and device
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* Handler - Address of the handler
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* Context - Value passed to the handler on each GPE
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*
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* RETURN: Status
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*
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* DESCRIPTION: Install a handler for notifies on an ACPI device
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*
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******************************************************************************/
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acpi_status
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acpi_install_notify_handler (
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acpi_handle device,
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u32 handler_type,
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acpi_notify_handler handler,
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void *context)
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{
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union acpi_operand_object *obj_desc;
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union acpi_operand_object *notify_obj;
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struct acpi_namespace_node *node;
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acpi_status status;
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ACPI_FUNCTION_TRACE ("acpi_install_notify_handler");
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/* Parameter validation */
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if ((!device) ||
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(!handler) ||
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(handler_type > ACPI_MAX_NOTIFY_HANDLER_TYPE)) {
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return_ACPI_STATUS (AE_BAD_PARAMETER);
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}
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status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE);
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if (ACPI_FAILURE (status)) {
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return_ACPI_STATUS (status);
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}
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/* Convert and validate the device handle */
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node = acpi_ns_map_handle_to_node (device);
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if (!node) {
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status = AE_BAD_PARAMETER;
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goto unlock_and_exit;
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}
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/*
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* Root Object:
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* Registering a notify handler on the root object indicates that the
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* caller wishes to receive notifications for all objects. Note that
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* only one <external> global handler can be regsitered (per notify type).
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*/
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if (device == ACPI_ROOT_OBJECT) {
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/* Make sure the handler is not already installed */
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if (((handler_type & ACPI_SYSTEM_NOTIFY) &&
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acpi_gbl_system_notify.handler) ||
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((handler_type & ACPI_DEVICE_NOTIFY) &&
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acpi_gbl_device_notify.handler)) {
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status = AE_ALREADY_EXISTS;
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goto unlock_and_exit;
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}
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if (handler_type & ACPI_SYSTEM_NOTIFY) {
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acpi_gbl_system_notify.node = node;
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acpi_gbl_system_notify.handler = handler;
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acpi_gbl_system_notify.context = context;
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}
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if (handler_type & ACPI_DEVICE_NOTIFY) {
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acpi_gbl_device_notify.node = node;
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acpi_gbl_device_notify.handler = handler;
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acpi_gbl_device_notify.context = context;
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}
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/* Global notify handler installed */
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}
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/*
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* All Other Objects:
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* Caller will only receive notifications specific to the target object.
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* Note that only certain object types can receive notifications.
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*/
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else {
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/* Notifies allowed on this object? */
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if (!acpi_ev_is_notify_object (node)) {
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status = AE_TYPE;
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goto unlock_and_exit;
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}
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/* Check for an existing internal object */
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obj_desc = acpi_ns_get_attached_object (node);
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if (obj_desc) {
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/* Object exists - make sure there's no handler */
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if (((handler_type & ACPI_SYSTEM_NOTIFY) &&
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obj_desc->common_notify.system_notify) ||
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((handler_type & ACPI_DEVICE_NOTIFY) &&
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obj_desc->common_notify.device_notify)) {
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status = AE_ALREADY_EXISTS;
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goto unlock_and_exit;
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}
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}
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else {
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/* Create a new object */
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obj_desc = acpi_ut_create_internal_object (node->type);
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if (!obj_desc) {
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status = AE_NO_MEMORY;
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goto unlock_and_exit;
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}
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/* Attach new object to the Node */
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status = acpi_ns_attach_object (device, obj_desc, node->type);
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/* Remove local reference to the object */
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acpi_ut_remove_reference (obj_desc);
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if (ACPI_FAILURE (status)) {
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goto unlock_and_exit;
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}
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}
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/* Install the handler */
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notify_obj = acpi_ut_create_internal_object (ACPI_TYPE_LOCAL_NOTIFY);
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if (!notify_obj) {
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status = AE_NO_MEMORY;
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goto unlock_and_exit;
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}
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notify_obj->notify.node = node;
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notify_obj->notify.handler = handler;
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notify_obj->notify.context = context;
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if (handler_type & ACPI_SYSTEM_NOTIFY) {
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obj_desc->common_notify.system_notify = notify_obj;
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}
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if (handler_type & ACPI_DEVICE_NOTIFY) {
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obj_desc->common_notify.device_notify = notify_obj;
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}
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if (handler_type == ACPI_ALL_NOTIFY) {
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/* Extra ref if installed in both */
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acpi_ut_add_reference (notify_obj);
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}
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}
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unlock_and_exit:
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(void) acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
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return_ACPI_STATUS (status);
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}
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EXPORT_SYMBOL(acpi_install_notify_handler);
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/*******************************************************************************
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*
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* FUNCTION: acpi_remove_notify_handler
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*
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* PARAMETERS: Device - The device for which notifies will be handled
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* handler_type - The type of handler:
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* ACPI_SYSTEM_NOTIFY: system_handler (00-7f)
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* ACPI_DEVICE_NOTIFY: driver_handler (80-ff)
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* ACPI_ALL_NOTIFY: both system and device
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* Handler - Address of the handler
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*
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* RETURN: Status
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*
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* DESCRIPTION: Remove a handler for notifies on an ACPI device
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*
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******************************************************************************/
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acpi_status
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acpi_remove_notify_handler (
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acpi_handle device,
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u32 handler_type,
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acpi_notify_handler handler)
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{
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union acpi_operand_object *notify_obj;
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union acpi_operand_object *obj_desc;
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struct acpi_namespace_node *node;
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acpi_status status;
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|
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ACPI_FUNCTION_TRACE ("acpi_remove_notify_handler");
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|
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/* Parameter validation */
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if ((!device) ||
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(!handler) ||
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(handler_type > ACPI_MAX_NOTIFY_HANDLER_TYPE)) {
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return_ACPI_STATUS (AE_BAD_PARAMETER);
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}
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status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE);
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if (ACPI_FAILURE (status)) {
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return_ACPI_STATUS (status);
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}
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/* Convert and validate the device handle */
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node = acpi_ns_map_handle_to_node (device);
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if (!node) {
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status = AE_BAD_PARAMETER;
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goto unlock_and_exit;
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}
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/* Root Object */
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|
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if (device == ACPI_ROOT_OBJECT) {
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ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
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"Removing notify handler for ROOT object.\n"));
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|
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if (((handler_type & ACPI_SYSTEM_NOTIFY) &&
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!acpi_gbl_system_notify.handler) ||
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((handler_type & ACPI_DEVICE_NOTIFY) &&
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!acpi_gbl_device_notify.handler)) {
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status = AE_NOT_EXIST;
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goto unlock_and_exit;
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}
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/* Make sure all deferred tasks are completed */
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(void) acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
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acpi_os_wait_events_complete(NULL);
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status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE);
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if (ACPI_FAILURE (status)) {
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return_ACPI_STATUS (status);
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}
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|
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if (handler_type & ACPI_SYSTEM_NOTIFY) {
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acpi_gbl_system_notify.node = NULL;
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acpi_gbl_system_notify.handler = NULL;
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acpi_gbl_system_notify.context = NULL;
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}
|
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|
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if (handler_type & ACPI_DEVICE_NOTIFY) {
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acpi_gbl_device_notify.node = NULL;
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acpi_gbl_device_notify.handler = NULL;
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acpi_gbl_device_notify.context = NULL;
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}
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}
|
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/* All Other Objects */
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else {
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/* Notifies allowed on this object? */
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|
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if (!acpi_ev_is_notify_object (node)) {
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status = AE_TYPE;
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goto unlock_and_exit;
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}
|
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|
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/* Check for an existing internal object */
|
|
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obj_desc = acpi_ns_get_attached_object (node);
|
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if (!obj_desc) {
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status = AE_NOT_EXIST;
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goto unlock_and_exit;
|
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}
|
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|
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/* Object exists - make sure there's an existing handler */
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|
|
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if (handler_type & ACPI_SYSTEM_NOTIFY) {
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notify_obj = obj_desc->common_notify.system_notify;
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if ((!notify_obj) ||
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(notify_obj->notify.handler != handler)) {
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status = AE_BAD_PARAMETER;
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goto unlock_and_exit;
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}
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/* Make sure all deferred tasks are completed */
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(void) acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
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acpi_os_wait_events_complete(NULL);
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status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE);
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if (ACPI_FAILURE (status)) {
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return_ACPI_STATUS (status);
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}
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/* 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_device - Namespace node for the GPE (NULL for FADT
|
|
* defined GPEs)
|
|
* gpe_number - The GPE number within the GPE block
|
|
* 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_device - Namespace node for the GPE (NULL for FADT
|
|
* defined GPEs)
|
|
* gpe_number - The event to remove a handler
|
|
* 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
|
|
* Handle - Where the handle to the lock is returned
|
|
* (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. The handle must be valid.
|
|
*
|
|
******************************************************************************/
|
|
|
|
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);
|
|
|