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1// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
2/******************************************************************************
3 *
4 * Module Name: evgpeutil - GPE utilities
5 *
6 * Copyright (C) 2000 - 2023, Intel Corp.
7 *
8 *****************************************************************************/
9
10#include <acpi/acpi.h>
11#include "accommon.h"
12#include "acevents.h"
13
14#define _COMPONENT ACPI_EVENTS
15ACPI_MODULE_NAME("evgpeutil")
16
17#if (!ACPI_REDUCED_HARDWARE) /* Entire module */
18/*******************************************************************************
19 *
20 * FUNCTION: acpi_ev_walk_gpe_list
21 *
22 * PARAMETERS: gpe_walk_callback - Routine called for each GPE block
23 * context - Value passed to callback
24 *
25 * RETURN: Status
26 *
27 * DESCRIPTION: Walk the GPE lists.
28 *
29 ******************************************************************************/
30acpi_status
31acpi_ev_walk_gpe_list(acpi_gpe_callback gpe_walk_callback, void *context)
32{
33 struct acpi_gpe_block_info *gpe_block;
34 struct acpi_gpe_xrupt_info *gpe_xrupt_info;
35 acpi_status status = AE_OK;
36 acpi_cpu_flags flags;
37
38 ACPI_FUNCTION_TRACE(ev_walk_gpe_list);
39
40 flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
41
42 /* Walk the interrupt level descriptor list */
43
44 gpe_xrupt_info = acpi_gbl_gpe_xrupt_list_head;
45 while (gpe_xrupt_info) {
46
47 /* Walk all Gpe Blocks attached to this interrupt level */
48
49 gpe_block = gpe_xrupt_info->gpe_block_list_head;
50 while (gpe_block) {
51
52 /* One callback per GPE block */
53
54 status =
55 gpe_walk_callback(gpe_xrupt_info, gpe_block,
56 context);
57 if (ACPI_FAILURE(status)) {
58 if (status == AE_CTRL_END) { /* Callback abort */
59 status = AE_OK;
60 }
61 goto unlock_and_exit;
62 }
63
64 gpe_block = gpe_block->next;
65 }
66
67 gpe_xrupt_info = gpe_xrupt_info->next;
68 }
69
70unlock_and_exit:
71 acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
72 return_ACPI_STATUS(status);
73}
74
75/*******************************************************************************
76 *
77 * FUNCTION: acpi_ev_get_gpe_device
78 *
79 * PARAMETERS: GPE_WALK_CALLBACK
80 *
81 * RETURN: Status
82 *
83 * DESCRIPTION: Matches the input GPE index (0-current_gpe_count) with a GPE
84 * block device. NULL if the GPE is one of the FADT-defined GPEs.
85 *
86 ******************************************************************************/
87
88acpi_status
89acpi_ev_get_gpe_device(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
90 struct acpi_gpe_block_info *gpe_block, void *context)
91{
92 struct acpi_gpe_device_info *info = context;
93
94 /* Increment Index by the number of GPEs in this block */
95
96 info->next_block_base_index += gpe_block->gpe_count;
97
98 if (info->index < info->next_block_base_index) {
99 /*
100 * The GPE index is within this block, get the node. Leave the node
101 * NULL for the FADT-defined GPEs
102 */
103 if ((gpe_block->node)->type == ACPI_TYPE_DEVICE) {
104 info->gpe_device = gpe_block->node;
105 }
106
107 info->status = AE_OK;
108 return (AE_CTRL_END);
109 }
110
111 return (AE_OK);
112}
113
114/*******************************************************************************
115 *
116 * FUNCTION: acpi_ev_get_gpe_xrupt_block
117 *
118 * PARAMETERS: interrupt_number - Interrupt for a GPE block
119 * gpe_xrupt_block - Where the block is returned
120 *
121 * RETURN: Status
122 *
123 * DESCRIPTION: Get or Create a GPE interrupt block. There is one interrupt
124 * block per unique interrupt level used for GPEs. Should be
125 * called only when the GPE lists are semaphore locked and not
126 * subject to change.
127 *
128 ******************************************************************************/
129
130acpi_status
131acpi_ev_get_gpe_xrupt_block(u32 interrupt_number,
132 struct acpi_gpe_xrupt_info **gpe_xrupt_block)
133{
134 struct acpi_gpe_xrupt_info *next_gpe_xrupt;
135 struct acpi_gpe_xrupt_info *gpe_xrupt;
136 acpi_status status;
137 acpi_cpu_flags flags;
138
139 ACPI_FUNCTION_TRACE(ev_get_gpe_xrupt_block);
140
141 /* No need for lock since we are not changing any list elements here */
142
143 next_gpe_xrupt = acpi_gbl_gpe_xrupt_list_head;
144 while (next_gpe_xrupt) {
145 if (next_gpe_xrupt->interrupt_number == interrupt_number) {
146 *gpe_xrupt_block = next_gpe_xrupt;
147 return_ACPI_STATUS(AE_OK);
148 }
149
150 next_gpe_xrupt = next_gpe_xrupt->next;
151 }
152
153 /* Not found, must allocate a new xrupt descriptor */
154
155 gpe_xrupt = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_gpe_xrupt_info));
156 if (!gpe_xrupt) {
157 return_ACPI_STATUS(AE_NO_MEMORY);
158 }
159
160 gpe_xrupt->interrupt_number = interrupt_number;
161
162 /* Install new interrupt descriptor with spin lock */
163
164 flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
165 if (acpi_gbl_gpe_xrupt_list_head) {
166 next_gpe_xrupt = acpi_gbl_gpe_xrupt_list_head;
167 while (next_gpe_xrupt->next) {
168 next_gpe_xrupt = next_gpe_xrupt->next;
169 }
170
171 next_gpe_xrupt->next = gpe_xrupt;
172 gpe_xrupt->previous = next_gpe_xrupt;
173 } else {
174 acpi_gbl_gpe_xrupt_list_head = gpe_xrupt;
175 }
176
177 acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
178
179 /* Install new interrupt handler if not SCI_INT */
180
181 if (interrupt_number != acpi_gbl_FADT.sci_interrupt) {
182 status = acpi_os_install_interrupt_handler(interrupt_number,
183 acpi_ev_gpe_xrupt_handler,
184 gpe_xrupt);
185 if (ACPI_FAILURE(status)) {
186 ACPI_EXCEPTION((AE_INFO, status,
187 "Could not install GPE interrupt handler at level 0x%X",
188 interrupt_number));
189 return_ACPI_STATUS(status);
190 }
191 }
192
193 *gpe_xrupt_block = gpe_xrupt;
194 return_ACPI_STATUS(AE_OK);
195}
196
197/*******************************************************************************
198 *
199 * FUNCTION: acpi_ev_delete_gpe_xrupt
200 *
201 * PARAMETERS: gpe_xrupt - A GPE interrupt info block
202 *
203 * RETURN: Status
204 *
205 * DESCRIPTION: Remove and free a gpe_xrupt block. Remove an associated
206 * interrupt handler if not the SCI interrupt.
207 *
208 ******************************************************************************/
209
210acpi_status acpi_ev_delete_gpe_xrupt(struct acpi_gpe_xrupt_info *gpe_xrupt)
211{
212 acpi_status status;
213 acpi_cpu_flags flags;
214
215 ACPI_FUNCTION_TRACE(ev_delete_gpe_xrupt);
216
217 /* We never want to remove the SCI interrupt handler */
218
219 if (gpe_xrupt->interrupt_number == acpi_gbl_FADT.sci_interrupt) {
220 gpe_xrupt->gpe_block_list_head = NULL;
221 return_ACPI_STATUS(AE_OK);
222 }
223
224 /* Disable this interrupt */
225
226 status =
227 acpi_os_remove_interrupt_handler(gpe_xrupt->interrupt_number,
228 acpi_ev_gpe_xrupt_handler);
229 if (ACPI_FAILURE(status)) {
230 return_ACPI_STATUS(status);
231 }
232
233 /* Unlink the interrupt block with lock */
234
235 flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
236 if (gpe_xrupt->previous) {
237 gpe_xrupt->previous->next = gpe_xrupt->next;
238 } else {
239 /* No previous, update list head */
240
241 acpi_gbl_gpe_xrupt_list_head = gpe_xrupt->next;
242 }
243
244 if (gpe_xrupt->next) {
245 gpe_xrupt->next->previous = gpe_xrupt->previous;
246 }
247 acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
248
249 /* Free the block */
250
251 ACPI_FREE(gpe_xrupt);
252 return_ACPI_STATUS(AE_OK);
253}
254
255/*******************************************************************************
256 *
257 * FUNCTION: acpi_ev_delete_gpe_handlers
258 *
259 * PARAMETERS: gpe_xrupt_info - GPE Interrupt info
260 * gpe_block - Gpe Block info
261 *
262 * RETURN: Status
263 *
264 * DESCRIPTION: Delete all Handler objects found in the GPE data structs.
265 * Used only prior to termination.
266 *
267 ******************************************************************************/
268
269acpi_status
270acpi_ev_delete_gpe_handlers(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
271 struct acpi_gpe_block_info *gpe_block,
272 void *context)
273{
274 struct acpi_gpe_event_info *gpe_event_info;
275 struct acpi_gpe_notify_info *notify;
276 struct acpi_gpe_notify_info *next;
277 u32 i;
278 u32 j;
279
280 ACPI_FUNCTION_TRACE(ev_delete_gpe_handlers);
281
282 /* Examine each GPE Register within the block */
283
284 for (i = 0; i < gpe_block->register_count; i++) {
285
286 /* Now look at the individual GPEs in this byte register */
287
288 for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++) {
289 gpe_event_info = &gpe_block->event_info[((acpi_size)i *
290 ACPI_GPE_REGISTER_WIDTH)
291 + j];
292
293 if ((ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) ==
294 ACPI_GPE_DISPATCH_HANDLER) ||
295 (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) ==
296 ACPI_GPE_DISPATCH_RAW_HANDLER)) {
297
298 /* Delete an installed handler block */
299
300 ACPI_FREE(gpe_event_info->dispatch.handler);
301 gpe_event_info->dispatch.handler = NULL;
302 gpe_event_info->flags &=
303 ~ACPI_GPE_DISPATCH_MASK;
304 } else if (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags)
305 == ACPI_GPE_DISPATCH_NOTIFY) {
306
307 /* Delete the implicit notification device list */
308
309 notify = gpe_event_info->dispatch.notify_list;
310 while (notify) {
311 next = notify->next;
312 ACPI_FREE(notify);
313 notify = next;
314 }
315
316 gpe_event_info->dispatch.notify_list = NULL;
317 gpe_event_info->flags &=
318 ~ACPI_GPE_DISPATCH_MASK;
319 }
320 }
321 }
322
323 return_ACPI_STATUS(AE_OK);
324}
325
326#endif /* !ACPI_REDUCED_HARDWARE */
1/******************************************************************************
2 *
3 * Module Name: evgpeutil - GPE utilities
4 *
5 *****************************************************************************/
6
7/*
8 * Copyright (C) 2000 - 2011, Intel Corp.
9 * All rights reserved.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions, and the following disclaimer,
16 * without modification.
17 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
18 * substantially similar to the "NO WARRANTY" disclaimer below
19 * ("Disclaimer") and any redistribution must be conditioned upon
20 * including a substantially similar Disclaimer requirement for further
21 * binary redistribution.
22 * 3. Neither the names of the above-listed copyright holders nor the names
23 * of any contributors may be used to endorse or promote products derived
24 * from this software without specific prior written permission.
25 *
26 * Alternatively, this software may be distributed under the terms of the
27 * GNU General Public License ("GPL") version 2 as published by the Free
28 * Software Foundation.
29 *
30 * NO WARRANTY
31 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
32 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
33 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
34 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
35 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
36 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
37 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
40 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
41 * POSSIBILITY OF SUCH DAMAGES.
42 */
43
44#include <acpi/acpi.h>
45#include "accommon.h"
46#include "acevents.h"
47
48#define _COMPONENT ACPI_EVENTS
49ACPI_MODULE_NAME("evgpeutil")
50
51/*******************************************************************************
52 *
53 * FUNCTION: acpi_ev_walk_gpe_list
54 *
55 * PARAMETERS: gpe_walk_callback - Routine called for each GPE block
56 * Context - Value passed to callback
57 *
58 * RETURN: Status
59 *
60 * DESCRIPTION: Walk the GPE lists.
61 *
62 ******************************************************************************/
63acpi_status
64acpi_ev_walk_gpe_list(acpi_gpe_callback gpe_walk_callback, void *context)
65{
66 struct acpi_gpe_block_info *gpe_block;
67 struct acpi_gpe_xrupt_info *gpe_xrupt_info;
68 acpi_status status = AE_OK;
69 acpi_cpu_flags flags;
70
71 ACPI_FUNCTION_TRACE(ev_walk_gpe_list);
72
73 flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
74
75 /* Walk the interrupt level descriptor list */
76
77 gpe_xrupt_info = acpi_gbl_gpe_xrupt_list_head;
78 while (gpe_xrupt_info) {
79
80 /* Walk all Gpe Blocks attached to this interrupt level */
81
82 gpe_block = gpe_xrupt_info->gpe_block_list_head;
83 while (gpe_block) {
84
85 /* One callback per GPE block */
86
87 status =
88 gpe_walk_callback(gpe_xrupt_info, gpe_block,
89 context);
90 if (ACPI_FAILURE(status)) {
91 if (status == AE_CTRL_END) { /* Callback abort */
92 status = AE_OK;
93 }
94 goto unlock_and_exit;
95 }
96
97 gpe_block = gpe_block->next;
98 }
99
100 gpe_xrupt_info = gpe_xrupt_info->next;
101 }
102
103 unlock_and_exit:
104 acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
105 return_ACPI_STATUS(status);
106}
107
108/*******************************************************************************
109 *
110 * FUNCTION: acpi_ev_valid_gpe_event
111 *
112 * PARAMETERS: gpe_event_info - Info for this GPE
113 *
114 * RETURN: TRUE if the gpe_event is valid
115 *
116 * DESCRIPTION: Validate a GPE event. DO NOT CALL FROM INTERRUPT LEVEL.
117 * Should be called only when the GPE lists are semaphore locked
118 * and not subject to change.
119 *
120 ******************************************************************************/
121
122u8 acpi_ev_valid_gpe_event(struct acpi_gpe_event_info *gpe_event_info)
123{
124 struct acpi_gpe_xrupt_info *gpe_xrupt_block;
125 struct acpi_gpe_block_info *gpe_block;
126
127 ACPI_FUNCTION_ENTRY();
128
129 /* No need for spin lock since we are not changing any list elements */
130
131 /* Walk the GPE interrupt levels */
132
133 gpe_xrupt_block = acpi_gbl_gpe_xrupt_list_head;
134 while (gpe_xrupt_block) {
135 gpe_block = gpe_xrupt_block->gpe_block_list_head;
136
137 /* Walk the GPE blocks on this interrupt level */
138
139 while (gpe_block) {
140 if ((&gpe_block->event_info[0] <= gpe_event_info) &&
141 (&gpe_block->event_info[gpe_block->gpe_count] >
142 gpe_event_info)) {
143 return (TRUE);
144 }
145
146 gpe_block = gpe_block->next;
147 }
148
149 gpe_xrupt_block = gpe_xrupt_block->next;
150 }
151
152 return (FALSE);
153}
154
155/*******************************************************************************
156 *
157 * FUNCTION: acpi_ev_get_gpe_device
158 *
159 * PARAMETERS: GPE_WALK_CALLBACK
160 *
161 * RETURN: Status
162 *
163 * DESCRIPTION: Matches the input GPE index (0-current_gpe_count) with a GPE
164 * block device. NULL if the GPE is one of the FADT-defined GPEs.
165 *
166 ******************************************************************************/
167
168acpi_status
169acpi_ev_get_gpe_device(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
170 struct acpi_gpe_block_info *gpe_block, void *context)
171{
172 struct acpi_gpe_device_info *info = context;
173
174 /* Increment Index by the number of GPEs in this block */
175
176 info->next_block_base_index += gpe_block->gpe_count;
177
178 if (info->index < info->next_block_base_index) {
179 /*
180 * The GPE index is within this block, get the node. Leave the node
181 * NULL for the FADT-defined GPEs
182 */
183 if ((gpe_block->node)->type == ACPI_TYPE_DEVICE) {
184 info->gpe_device = gpe_block->node;
185 }
186
187 info->status = AE_OK;
188 return (AE_CTRL_END);
189 }
190
191 return (AE_OK);
192}
193
194/*******************************************************************************
195 *
196 * FUNCTION: acpi_ev_get_gpe_xrupt_block
197 *
198 * PARAMETERS: interrupt_number - Interrupt for a GPE block
199 *
200 * RETURN: A GPE interrupt block
201 *
202 * DESCRIPTION: Get or Create a GPE interrupt block. There is one interrupt
203 * block per unique interrupt level used for GPEs. Should be
204 * called only when the GPE lists are semaphore locked and not
205 * subject to change.
206 *
207 ******************************************************************************/
208
209struct acpi_gpe_xrupt_info *acpi_ev_get_gpe_xrupt_block(u32 interrupt_number)
210{
211 struct acpi_gpe_xrupt_info *next_gpe_xrupt;
212 struct acpi_gpe_xrupt_info *gpe_xrupt;
213 acpi_status status;
214 acpi_cpu_flags flags;
215
216 ACPI_FUNCTION_TRACE(ev_get_gpe_xrupt_block);
217
218 /* No need for lock since we are not changing any list elements here */
219
220 next_gpe_xrupt = acpi_gbl_gpe_xrupt_list_head;
221 while (next_gpe_xrupt) {
222 if (next_gpe_xrupt->interrupt_number == interrupt_number) {
223 return_PTR(next_gpe_xrupt);
224 }
225
226 next_gpe_xrupt = next_gpe_xrupt->next;
227 }
228
229 /* Not found, must allocate a new xrupt descriptor */
230
231 gpe_xrupt = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_gpe_xrupt_info));
232 if (!gpe_xrupt) {
233 return_PTR(NULL);
234 }
235
236 gpe_xrupt->interrupt_number = interrupt_number;
237
238 /* Install new interrupt descriptor with spin lock */
239
240 flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
241 if (acpi_gbl_gpe_xrupt_list_head) {
242 next_gpe_xrupt = acpi_gbl_gpe_xrupt_list_head;
243 while (next_gpe_xrupt->next) {
244 next_gpe_xrupt = next_gpe_xrupt->next;
245 }
246
247 next_gpe_xrupt->next = gpe_xrupt;
248 gpe_xrupt->previous = next_gpe_xrupt;
249 } else {
250 acpi_gbl_gpe_xrupt_list_head = gpe_xrupt;
251 }
252 acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
253
254 /* Install new interrupt handler if not SCI_INT */
255
256 if (interrupt_number != acpi_gbl_FADT.sci_interrupt) {
257 status = acpi_os_install_interrupt_handler(interrupt_number,
258 acpi_ev_gpe_xrupt_handler,
259 gpe_xrupt);
260 if (ACPI_FAILURE(status)) {
261 ACPI_ERROR((AE_INFO,
262 "Could not install GPE interrupt handler at level 0x%X",
263 interrupt_number));
264 return_PTR(NULL);
265 }
266 }
267
268 return_PTR(gpe_xrupt);
269}
270
271/*******************************************************************************
272 *
273 * FUNCTION: acpi_ev_delete_gpe_xrupt
274 *
275 * PARAMETERS: gpe_xrupt - A GPE interrupt info block
276 *
277 * RETURN: Status
278 *
279 * DESCRIPTION: Remove and free a gpe_xrupt block. Remove an associated
280 * interrupt handler if not the SCI interrupt.
281 *
282 ******************************************************************************/
283
284acpi_status acpi_ev_delete_gpe_xrupt(struct acpi_gpe_xrupt_info *gpe_xrupt)
285{
286 acpi_status status;
287 acpi_cpu_flags flags;
288
289 ACPI_FUNCTION_TRACE(ev_delete_gpe_xrupt);
290
291 /* We never want to remove the SCI interrupt handler */
292
293 if (gpe_xrupt->interrupt_number == acpi_gbl_FADT.sci_interrupt) {
294 gpe_xrupt->gpe_block_list_head = NULL;
295 return_ACPI_STATUS(AE_OK);
296 }
297
298 /* Disable this interrupt */
299
300 status =
301 acpi_os_remove_interrupt_handler(gpe_xrupt->interrupt_number,
302 acpi_ev_gpe_xrupt_handler);
303 if (ACPI_FAILURE(status)) {
304 return_ACPI_STATUS(status);
305 }
306
307 /* Unlink the interrupt block with lock */
308
309 flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
310 if (gpe_xrupt->previous) {
311 gpe_xrupt->previous->next = gpe_xrupt->next;
312 } else {
313 /* No previous, update list head */
314
315 acpi_gbl_gpe_xrupt_list_head = gpe_xrupt->next;
316 }
317
318 if (gpe_xrupt->next) {
319 gpe_xrupt->next->previous = gpe_xrupt->previous;
320 }
321 acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
322
323 /* Free the block */
324
325 ACPI_FREE(gpe_xrupt);
326 return_ACPI_STATUS(AE_OK);
327}
328
329/*******************************************************************************
330 *
331 * FUNCTION: acpi_ev_delete_gpe_handlers
332 *
333 * PARAMETERS: gpe_xrupt_info - GPE Interrupt info
334 * gpe_block - Gpe Block info
335 *
336 * RETURN: Status
337 *
338 * DESCRIPTION: Delete all Handler objects found in the GPE data structs.
339 * Used only prior to termination.
340 *
341 ******************************************************************************/
342
343acpi_status
344acpi_ev_delete_gpe_handlers(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
345 struct acpi_gpe_block_info *gpe_block,
346 void *context)
347{
348 struct acpi_gpe_event_info *gpe_event_info;
349 u32 i;
350 u32 j;
351
352 ACPI_FUNCTION_TRACE(ev_delete_gpe_handlers);
353
354 /* Examine each GPE Register within the block */
355
356 for (i = 0; i < gpe_block->register_count; i++) {
357
358 /* Now look at the individual GPEs in this byte register */
359
360 for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++) {
361 gpe_event_info = &gpe_block->event_info[((acpi_size) i *
362 ACPI_GPE_REGISTER_WIDTH)
363 + j];
364
365 if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) ==
366 ACPI_GPE_DISPATCH_HANDLER) {
367 ACPI_FREE(gpe_event_info->dispatch.handler);
368 gpe_event_info->dispatch.handler = NULL;
369 gpe_event_info->flags &=
370 ~ACPI_GPE_DISPATCH_MASK;
371 }
372 }
373 }
374
375 return_ACPI_STATUS(AE_OK);
376}