Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /******************************************************************************* |
| 2 | * |
| 3 | * Module Name: utdelete - object deletion and reference count utilities |
| 4 | * |
| 5 | ******************************************************************************/ |
| 6 | |
| 7 | /* |
David E. Box | 82a8094 | 2015-02-05 15:20:45 +0800 | [diff] [blame] | 8 | * Copyright (C) 2000 - 2015, Intel Corp. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | #include <acpi/acpi.h> |
Len Brown | e2f7a77 | 2009-01-09 00:30:03 -0500 | [diff] [blame] | 45 | #include "accommon.h" |
| 46 | #include "acinterp.h" |
| 47 | #include "acnamesp.h" |
| 48 | #include "acevents.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | |
| 50 | #define _COMPONENT ACPI_UTILITIES |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 51 | ACPI_MODULE_NAME("utdelete") |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 53 | /* Local prototypes */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 54 | static void acpi_ut_delete_internal_obj(union acpi_operand_object *object); |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 55 | |
| 56 | static void |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 57 | acpi_ut_update_ref_count(union acpi_operand_object *object, u32 action); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | |
| 59 | /******************************************************************************* |
| 60 | * |
| 61 | * FUNCTION: acpi_ut_delete_internal_obj |
| 62 | * |
Bob Moore | ba494be | 2012-07-12 09:40:10 +0800 | [diff] [blame] | 63 | * PARAMETERS: object - Object to be deleted |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | * |
| 65 | * RETURN: None |
| 66 | * |
| 67 | * DESCRIPTION: Low level object deletion, after reference counts have been |
| 68 | * updated (All reference counts, including sub-objects!) |
| 69 | * |
| 70 | ******************************************************************************/ |
| 71 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 72 | static void acpi_ut_delete_internal_obj(union acpi_operand_object *object) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 74 | void *obj_pointer = NULL; |
| 75 | union acpi_operand_object *handler_desc; |
| 76 | union acpi_operand_object *second_desc; |
| 77 | union acpi_operand_object *next_desc; |
Bob Moore | f953529 | 2014-02-26 10:33:47 +0800 | [diff] [blame] | 78 | union acpi_operand_object *start_desc; |
Lin Ming | 3362a6b | 2009-05-21 11:03:29 +0800 | [diff] [blame] | 79 | union acpi_operand_object **last_obj_ptr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 81 | ACPI_FUNCTION_TRACE_PTR(ut_delete_internal_obj, object); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | |
| 83 | if (!object) { |
| 84 | return_VOID; |
| 85 | } |
| 86 | |
| 87 | /* |
| 88 | * Must delete or free any pointers within the object that are not |
| 89 | * actual ACPI objects (for example, a raw buffer pointer). |
| 90 | */ |
Bob Moore | 3371c19 | 2009-02-18 14:44:03 +0800 | [diff] [blame] | 91 | switch (object->common.type) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | case ACPI_TYPE_STRING: |
| 93 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 94 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
| 95 | "**** String %p, ptr %p\n", object, |
| 96 | object->string.pointer)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | |
| 98 | /* Free the actual string buffer */ |
| 99 | |
| 100 | if (!(object->common.flags & AOPOBJ_STATIC_POINTER)) { |
Bob Moore | 52fc0b0 | 2006-10-02 00:00:00 -0400 | [diff] [blame] | 101 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | /* But only if it is NOT a pointer into an ACPI table */ |
| 103 | |
| 104 | obj_pointer = object->string.pointer; |
| 105 | } |
| 106 | break; |
| 107 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 108 | case ACPI_TYPE_BUFFER: |
| 109 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 110 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
| 111 | "**** Buffer %p, ptr %p\n", object, |
| 112 | object->buffer.pointer)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | |
| 114 | /* Free the actual buffer */ |
| 115 | |
| 116 | if (!(object->common.flags & AOPOBJ_STATIC_POINTER)) { |
Bob Moore | 52fc0b0 | 2006-10-02 00:00:00 -0400 | [diff] [blame] | 117 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | /* But only if it is NOT a pointer into an ACPI table */ |
| 119 | |
| 120 | obj_pointer = object->buffer.pointer; |
| 121 | } |
| 122 | break; |
| 123 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | case ACPI_TYPE_PACKAGE: |
| 125 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 126 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
| 127 | " **** Package of count %X\n", |
| 128 | object->package.count)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | |
| 130 | /* |
| 131 | * Elements of the package are not handled here, they are deleted |
| 132 | * separately |
| 133 | */ |
| 134 | |
| 135 | /* Free the (variable length) element pointer array */ |
| 136 | |
| 137 | obj_pointer = object->package.elements; |
| 138 | break; |
| 139 | |
Bob Moore | 2843ae7 | 2008-07-04 10:41:41 +0800 | [diff] [blame] | 140 | /* |
| 141 | * These objects have a possible list of notify handlers. |
| 142 | * Device object also may have a GPE block. |
| 143 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 144 | case ACPI_TYPE_DEVICE: |
| 145 | |
| 146 | if (object->device.gpe_block) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 147 | (void)acpi_ev_delete_gpe_block(object->device. |
| 148 | gpe_block); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | } |
| 150 | |
Bob Moore | 2843ae7 | 2008-07-04 10:41:41 +0800 | [diff] [blame] | 151 | /*lint -fallthrough */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 152 | |
Bob Moore | 2843ae7 | 2008-07-04 10:41:41 +0800 | [diff] [blame] | 153 | case ACPI_TYPE_PROCESSOR: |
| 154 | case ACPI_TYPE_THERMAL: |
| 155 | |
Bob Moore | 86ed4bc | 2012-05-03 11:08:19 +0800 | [diff] [blame] | 156 | /* Walk the address handler list for this object */ |
Bob Moore | 2843ae7 | 2008-07-04 10:41:41 +0800 | [diff] [blame] | 157 | |
| 158 | handler_desc = object->common_notify.handler; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | while (handler_desc) { |
| 160 | next_desc = handler_desc->address_space.next; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 161 | acpi_ut_remove_reference(handler_desc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 162 | handler_desc = next_desc; |
| 163 | } |
| 164 | break; |
| 165 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | case ACPI_TYPE_MUTEX: |
| 167 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 168 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
Bob Moore | 967440e3 | 2006-06-23 17:04:00 -0400 | [diff] [blame] | 169 | "***** Mutex %p, OS Mutex %p\n", |
| 170 | object, object->mutex.os_mutex)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 171 | |
Bob Moore | ba886cd | 2008-04-10 19:06:37 +0400 | [diff] [blame] | 172 | if (object == acpi_gbl_global_lock_mutex) { |
Bob Moore | c81da66 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 173 | |
| 174 | /* Global Lock has extra semaphore */ |
Bob Moore | 967440e3 | 2006-06-23 17:04:00 -0400 | [diff] [blame] | 175 | |
| 176 | (void) |
| 177 | acpi_os_delete_semaphore |
| 178 | (acpi_gbl_global_lock_semaphore); |
| 179 | acpi_gbl_global_lock_semaphore = NULL; |
Bob Moore | c81da66 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 180 | |
| 181 | acpi_os_delete_mutex(object->mutex.os_mutex); |
| 182 | acpi_gbl_global_lock_mutex = NULL; |
| 183 | } else { |
Len Brown | 262a7a2 | 2007-05-09 23:01:59 -0400 | [diff] [blame] | 184 | acpi_ex_unlink_mutex(object); |
Bob Moore | c81da66 | 2007-02-02 19:48:18 +0300 | [diff] [blame] | 185 | acpi_os_delete_mutex(object->mutex.os_mutex); |
Bob Moore | 967440e3 | 2006-06-23 17:04:00 -0400 | [diff] [blame] | 186 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 187 | break; |
| 188 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 189 | case ACPI_TYPE_EVENT: |
| 190 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 191 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
Bob Moore | 967440e3 | 2006-06-23 17:04:00 -0400 | [diff] [blame] | 192 | "***** Event %p, OS Semaphore %p\n", |
| 193 | object, object->event.os_semaphore)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 194 | |
Bob Moore | 967440e3 | 2006-06-23 17:04:00 -0400 | [diff] [blame] | 195 | (void)acpi_os_delete_semaphore(object->event.os_semaphore); |
| 196 | object->event.os_semaphore = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 197 | break; |
| 198 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 199 | case ACPI_TYPE_METHOD: |
| 200 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 201 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
| 202 | "***** Method %p\n", object)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 203 | |
Bob Moore | 967440e3 | 2006-06-23 17:04:00 -0400 | [diff] [blame] | 204 | /* Delete the method mutex if it exists */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 205 | |
Bob Moore | 967440e3 | 2006-06-23 17:04:00 -0400 | [diff] [blame] | 206 | if (object->method.mutex) { |
| 207 | acpi_os_delete_mutex(object->method.mutex->mutex. |
| 208 | os_mutex); |
| 209 | acpi_ut_delete_object_desc(object->method.mutex); |
| 210 | object->method.mutex = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 211 | } |
Lv Zheng | 07b9c91 | 2015-07-23 12:52:31 +0800 | [diff] [blame] | 212 | if (object->method.node) { |
| 213 | object->method.node = NULL; |
| 214 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | break; |
| 216 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 217 | case ACPI_TYPE_REGION: |
| 218 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 219 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
| 220 | "***** Region %p\n", object)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 221 | |
Lin Ming | f654c0f | 2012-01-12 13:10:32 +0800 | [diff] [blame] | 222 | /* |
| 223 | * Update address_range list. However, only permanent regions |
| 224 | * are installed in this list. (Not created within a method) |
| 225 | */ |
| 226 | if (!(object->region.node->flags & ANOBJ_TEMPORARY)) { |
| 227 | acpi_ut_remove_address_range(object->region.space_id, |
| 228 | object->region.node); |
| 229 | } |
Lin Ming | a5fe1a0 | 2009-08-13 10:43:27 +0800 | [diff] [blame] | 230 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 231 | second_desc = acpi_ns_get_secondary_object(object); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 232 | if (second_desc) { |
| 233 | /* |
| 234 | * Free the region_context if and only if the handler is one of the |
| 235 | * default handlers -- and therefore, we created the context object |
| 236 | * locally, it was not created by an external caller. |
| 237 | */ |
| 238 | handler_desc = object->region.handler; |
| 239 | if (handler_desc) { |
Lin Ming | 3362a6b | 2009-05-21 11:03:29 +0800 | [diff] [blame] | 240 | next_desc = |
| 241 | handler_desc->address_space.region_list; |
Bob Moore | f953529 | 2014-02-26 10:33:47 +0800 | [diff] [blame] | 242 | start_desc = next_desc; |
Lin Ming | 3362a6b | 2009-05-21 11:03:29 +0800 | [diff] [blame] | 243 | last_obj_ptr = |
| 244 | &handler_desc->address_space.region_list; |
| 245 | |
Bob Moore | f953529 | 2014-02-26 10:33:47 +0800 | [diff] [blame] | 246 | /* Remove the region object from the handler list */ |
Lin Ming | 3362a6b | 2009-05-21 11:03:29 +0800 | [diff] [blame] | 247 | |
| 248 | while (next_desc) { |
| 249 | if (next_desc == object) { |
| 250 | *last_obj_ptr = |
| 251 | next_desc->region.next; |
| 252 | break; |
| 253 | } |
| 254 | |
Bob Moore | f953529 | 2014-02-26 10:33:47 +0800 | [diff] [blame] | 255 | /* Walk the linked list of handlers */ |
Lin Ming | 3362a6b | 2009-05-21 11:03:29 +0800 | [diff] [blame] | 256 | |
| 257 | last_obj_ptr = &next_desc->region.next; |
| 258 | next_desc = next_desc->region.next; |
Bob Moore | f953529 | 2014-02-26 10:33:47 +0800 | [diff] [blame] | 259 | |
| 260 | /* Prevent infinite loop if list is corrupted */ |
| 261 | |
| 262 | if (next_desc == start_desc) { |
| 263 | ACPI_ERROR((AE_INFO, |
| 264 | "Circular region list in address handler object %p", |
| 265 | handler_desc)); |
| 266 | return_VOID; |
| 267 | } |
Lin Ming | 3362a6b | 2009-05-21 11:03:29 +0800 | [diff] [blame] | 268 | } |
| 269 | |
Bob Moore | 61686124 | 2006-03-17 16:44:00 -0500 | [diff] [blame] | 270 | if (handler_desc->address_space.handler_flags & |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 271 | ACPI_ADDR_HANDLER_DEFAULT_INSTALLED) { |
Bob Moore | 793c238 | 2006-03-31 00:00:00 -0500 | [diff] [blame] | 272 | |
| 273 | /* Deactivate region and free region context */ |
| 274 | |
| 275 | if (handler_desc->address_space.setup) { |
| 276 | (void)handler_desc-> |
| 277 | address_space.setup(object, |
| 278 | ACPI_REGION_DEACTIVATE, |
| 279 | handler_desc-> |
| 280 | address_space. |
| 281 | context, |
| 282 | &second_desc-> |
| 283 | extra. |
| 284 | region_context); |
| 285 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 286 | } |
| 287 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 288 | acpi_ut_remove_reference(handler_desc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 289 | } |
| 290 | |
| 291 | /* Now we can free the Extra object */ |
| 292 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 293 | acpi_ut_delete_object_desc(second_desc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 294 | } |
| 295 | break; |
| 296 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 297 | case ACPI_TYPE_BUFFER_FIELD: |
| 298 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 299 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
| 300 | "***** Buffer Field %p\n", object)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 301 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 302 | second_desc = acpi_ns_get_secondary_object(object); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 303 | if (second_desc) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 304 | acpi_ut_delete_object_desc(second_desc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 305 | } |
| 306 | break; |
| 307 | |
Lin Ming | ef805d9 | 2008-04-10 19:06:41 +0400 | [diff] [blame] | 308 | case ACPI_TYPE_LOCAL_BANK_FIELD: |
| 309 | |
| 310 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
| 311 | "***** Bank Field %p\n", object)); |
| 312 | |
| 313 | second_desc = acpi_ns_get_secondary_object(object); |
| 314 | if (second_desc) { |
| 315 | acpi_ut_delete_object_desc(second_desc); |
| 316 | } |
| 317 | break; |
| 318 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 319 | default: |
Chao Guan | 1d1ea1b7 | 2013-06-08 00:58:14 +0000 | [diff] [blame] | 320 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 321 | break; |
| 322 | } |
| 323 | |
| 324 | /* Free any allocated memory (pointer within the object) found above */ |
| 325 | |
| 326 | if (obj_pointer) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 327 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
| 328 | "Deleting Object Subptr %p\n", obj_pointer)); |
Bob Moore | 8313524 | 2006-10-03 00:00:00 -0400 | [diff] [blame] | 329 | ACPI_FREE(obj_pointer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 330 | } |
| 331 | |
| 332 | /* Now the object can be safely deleted */ |
| 333 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 334 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, "Deleting Object %p [%s]\n", |
| 335 | object, acpi_ut_get_object_type_name(object))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 336 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 337 | acpi_ut_delete_object_desc(object); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 338 | return_VOID; |
| 339 | } |
| 340 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 341 | /******************************************************************************* |
| 342 | * |
| 343 | * FUNCTION: acpi_ut_delete_internal_object_list |
| 344 | * |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 345 | * PARAMETERS: obj_list - Pointer to the list to be deleted |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 346 | * |
| 347 | * RETURN: None |
| 348 | * |
| 349 | * DESCRIPTION: This function deletes an internal object list, including both |
| 350 | * simple objects and package objects |
| 351 | * |
| 352 | ******************************************************************************/ |
| 353 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 354 | void acpi_ut_delete_internal_object_list(union acpi_operand_object **obj_list) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 355 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 356 | union acpi_operand_object **internal_obj; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 357 | |
Bob Moore | c8d586f | 2012-12-31 00:05:39 +0000 | [diff] [blame] | 358 | ACPI_FUNCTION_ENTRY(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 359 | |
| 360 | /* Walk the null-terminated internal list */ |
| 361 | |
| 362 | for (internal_obj = obj_list; *internal_obj; internal_obj++) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 363 | acpi_ut_remove_reference(*internal_obj); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 364 | } |
| 365 | |
| 366 | /* Free the combined parameter pointer list and object array */ |
| 367 | |
Bob Moore | 8313524 | 2006-10-03 00:00:00 -0400 | [diff] [blame] | 368 | ACPI_FREE(obj_list); |
Bob Moore | 0e770b3 | 2012-12-19 05:37:59 +0000 | [diff] [blame] | 369 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 370 | } |
| 371 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 372 | /******************************************************************************* |
| 373 | * |
| 374 | * FUNCTION: acpi_ut_update_ref_count |
| 375 | * |
Bob Moore | ba494be | 2012-07-12 09:40:10 +0800 | [diff] [blame] | 376 | * PARAMETERS: object - Object whose ref count is to be updated |
Bob Moore | 58892c9 | 2013-04-12 00:25:41 +0000 | [diff] [blame] | 377 | * action - What to do (REF_INCREMENT or REF_DECREMENT) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 378 | * |
Bob Moore | 58892c9 | 2013-04-12 00:25:41 +0000 | [diff] [blame] | 379 | * RETURN: None. Sets new reference count within the object |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 380 | * |
Bob Moore | 58892c9 | 2013-04-12 00:25:41 +0000 | [diff] [blame] | 381 | * DESCRIPTION: Modify the reference count for an internal acpi object |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 382 | * |
| 383 | ******************************************************************************/ |
| 384 | |
| 385 | static void |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 386 | acpi_ut_update_ref_count(union acpi_operand_object *object, u32 action) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 387 | { |
Bob Moore | 58892c9 | 2013-04-12 00:25:41 +0000 | [diff] [blame] | 388 | u16 original_count; |
| 389 | u16 new_count = 0; |
| 390 | acpi_cpu_flags lock_flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 391 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 392 | ACPI_FUNCTION_NAME(ut_update_ref_count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 393 | |
| 394 | if (!object) { |
| 395 | return; |
| 396 | } |
| 397 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 398 | /* |
Bob Moore | 58892c9 | 2013-04-12 00:25:41 +0000 | [diff] [blame] | 399 | * Always get the reference count lock. Note: Interpreter and/or |
| 400 | * Namespace is not always locked when this function is called. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 401 | */ |
Bob Moore | 58892c9 | 2013-04-12 00:25:41 +0000 | [diff] [blame] | 402 | lock_flags = acpi_os_acquire_lock(acpi_gbl_reference_count_lock); |
| 403 | original_count = object->common.reference_count; |
| 404 | |
| 405 | /* Perform the reference count action (increment, decrement) */ |
| 406 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 407 | switch (action) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 408 | case REF_INCREMENT: |
| 409 | |
Bob Moore | 58892c9 | 2013-04-12 00:25:41 +0000 | [diff] [blame] | 410 | new_count = original_count + 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 411 | object->common.reference_count = new_count; |
Bob Moore | 58892c9 | 2013-04-12 00:25:41 +0000 | [diff] [blame] | 412 | acpi_os_release_lock(acpi_gbl_reference_count_lock, lock_flags); |
| 413 | |
| 414 | /* The current reference count should never be zero here */ |
| 415 | |
| 416 | if (!original_count) { |
| 417 | ACPI_WARNING((AE_INFO, |
| 418 | "Obj %p, Reference Count was zero before increment\n", |
| 419 | object)); |
| 420 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 421 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 422 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
Bob Moore | 58892c9 | 2013-04-12 00:25:41 +0000 | [diff] [blame] | 423 | "Obj %p Type %.2X Refs %.2X [Incremented]\n", |
| 424 | object, object->common.type, new_count)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 425 | break; |
| 426 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 427 | case REF_DECREMENT: |
| 428 | |
Bob Moore | 58892c9 | 2013-04-12 00:25:41 +0000 | [diff] [blame] | 429 | /* The current reference count must be non-zero */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 430 | |
Bob Moore | 58892c9 | 2013-04-12 00:25:41 +0000 | [diff] [blame] | 431 | if (original_count) { |
| 432 | new_count = original_count - 1; |
| 433 | object->common.reference_count = new_count; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 434 | } |
| 435 | |
Bob Moore | 58892c9 | 2013-04-12 00:25:41 +0000 | [diff] [blame] | 436 | acpi_os_release_lock(acpi_gbl_reference_count_lock, lock_flags); |
| 437 | |
| 438 | if (!original_count) { |
| 439 | ACPI_WARNING((AE_INFO, |
| 440 | "Obj %p, Reference Count is already zero, cannot decrement\n", |
| 441 | object)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 442 | } |
| 443 | |
Bob Moore | 58892c9 | 2013-04-12 00:25:41 +0000 | [diff] [blame] | 444 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
| 445 | "Obj %p Type %.2X Refs %.2X [Decremented]\n", |
| 446 | object, object->common.type, new_count)); |
| 447 | |
| 448 | /* Actually delete the object on a reference count of zero */ |
| 449 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | if (new_count == 0) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 451 | acpi_ut_delete_internal_obj(object); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 452 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 453 | break; |
| 454 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 455 | default: |
| 456 | |
Bob Moore | 58892c9 | 2013-04-12 00:25:41 +0000 | [diff] [blame] | 457 | acpi_os_release_lock(acpi_gbl_reference_count_lock, lock_flags); |
| 458 | ACPI_ERROR((AE_INFO, "Unknown Reference Count action (0x%X)", |
| 459 | action)); |
| 460 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 461 | } |
| 462 | |
| 463 | /* |
| 464 | * Sanity check the reference count, for debug purposes only. |
| 465 | * (A deleted object will have a huge reference count) |
| 466 | */ |
Bob Moore | 58892c9 | 2013-04-12 00:25:41 +0000 | [diff] [blame] | 467 | if (new_count > ACPI_MAX_REFERENCE_COUNT) { |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 468 | ACPI_WARNING((AE_INFO, |
Bob Moore | 58892c9 | 2013-04-12 00:25:41 +0000 | [diff] [blame] | 469 | "Large Reference Count (0x%X) in object %p, Type=0x%.2X", |
| 470 | new_count, object, object->common.type)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 471 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 472 | } |
| 473 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 474 | /******************************************************************************* |
| 475 | * |
| 476 | * FUNCTION: acpi_ut_update_object_reference |
| 477 | * |
Bob Moore | ba494be | 2012-07-12 09:40:10 +0800 | [diff] [blame] | 478 | * PARAMETERS: object - Increment ref count for this object |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 479 | * and all sub-objects |
Bob Moore | 60f3deb | 2013-04-12 00:25:29 +0000 | [diff] [blame] | 480 | * action - Either REF_INCREMENT or REF_DECREMENT |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 481 | * |
| 482 | * RETURN: Status |
| 483 | * |
| 484 | * DESCRIPTION: Increment the object reference count |
| 485 | * |
| 486 | * Object references are incremented when: |
| 487 | * 1) An object is attached to a Node (namespace object) |
| 488 | * 2) An object is copied (all subobjects must be incremented) |
| 489 | * |
| 490 | * Object references are decremented when: |
| 491 | * 1) An object is detached from an Node |
| 492 | * |
| 493 | ******************************************************************************/ |
| 494 | |
| 495 | acpi_status |
Bob Moore | 4119532 | 2006-05-26 16:36:00 -0400 | [diff] [blame] | 496 | acpi_ut_update_object_reference(union acpi_operand_object *object, u16 action) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 497 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 498 | acpi_status status = AE_OK; |
| 499 | union acpi_generic_state *state_list = NULL; |
| 500 | union acpi_operand_object *next_object = NULL; |
Bob Moore | 86ed4bc | 2012-05-03 11:08:19 +0800 | [diff] [blame] | 501 | union acpi_operand_object *prev_object; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 502 | union acpi_generic_state *state; |
Bob Moore | 67a119f | 2008-06-10 13:42:13 +0800 | [diff] [blame] | 503 | u32 i; |
David Shaohua Li | 4c3ffbd | 2005-07-14 00:00:00 -0400 | [diff] [blame] | 504 | |
Bob Moore | 0e770b3 | 2012-12-19 05:37:59 +0000 | [diff] [blame] | 505 | ACPI_FUNCTION_NAME(ut_update_object_reference); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 506 | |
Robert Moore | f9f4601 | 2005-07-08 00:00:00 -0400 | [diff] [blame] | 507 | while (object) { |
Bob Moore | 52fc0b0 | 2006-10-02 00:00:00 -0400 | [diff] [blame] | 508 | |
Robert Moore | f9f4601 | 2005-07-08 00:00:00 -0400 | [diff] [blame] | 509 | /* Make sure that this isn't a namespace handle */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 510 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 511 | if (ACPI_GET_DESCRIPTOR_TYPE(object) == ACPI_DESC_TYPE_NAMED) { |
| 512 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
| 513 | "Object %p is NS handle\n", object)); |
Bob Moore | 0e770b3 | 2012-12-19 05:37:59 +0000 | [diff] [blame] | 514 | return (AE_OK); |
Robert Moore | f9f4601 | 2005-07-08 00:00:00 -0400 | [diff] [blame] | 515 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 516 | |
| 517 | /* |
| 518 | * All sub-objects must have their reference count incremented also. |
| 519 | * Different object types have different subobjects. |
| 520 | */ |
Bob Moore | 3371c19 | 2009-02-18 14:44:03 +0800 | [diff] [blame] | 521 | switch (object->common.type) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 522 | case ACPI_TYPE_DEVICE: |
Bob Moore | f6dd922 | 2006-07-07 20:44:38 -0400 | [diff] [blame] | 523 | case ACPI_TYPE_PROCESSOR: |
| 524 | case ACPI_TYPE_POWER: |
| 525 | case ACPI_TYPE_THERMAL: |
Bob Moore | 86ed4bc | 2012-05-03 11:08:19 +0800 | [diff] [blame] | 526 | /* |
| 527 | * Update the notify objects for these types (if present) |
| 528 | * Two lists, system and device notify handlers. |
| 529 | */ |
| 530 | for (i = 0; i < ACPI_NUM_NOTIFY_TYPES; i++) { |
| 531 | prev_object = |
| 532 | object->common_notify.notify_list[i]; |
| 533 | while (prev_object) { |
| 534 | next_object = |
| 535 | prev_object->notify.next[i]; |
| 536 | acpi_ut_update_ref_count(prev_object, |
| 537 | action); |
| 538 | prev_object = next_object; |
| 539 | } |
| 540 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 541 | break; |
| 542 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 543 | case ACPI_TYPE_PACKAGE: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 544 | /* |
Robert Moore | f9f4601 | 2005-07-08 00:00:00 -0400 | [diff] [blame] | 545 | * We must update all the sub-objects of the package, |
| 546 | * each of whom may have their own sub-objects. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 547 | */ |
| 548 | for (i = 0; i < object->package.count; i++) { |
| 549 | /* |
Chao Guan | 5393855 | 2012-12-19 05:37:53 +0000 | [diff] [blame] | 550 | * Null package elements are legal and can be simply |
| 551 | * ignored. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 552 | */ |
Chao Guan | 5393855 | 2012-12-19 05:37:53 +0000 | [diff] [blame] | 553 | next_object = object->package.elements[i]; |
| 554 | if (!next_object) { |
| 555 | continue; |
| 556 | } |
| 557 | |
| 558 | switch (next_object->common.type) { |
| 559 | case ACPI_TYPE_INTEGER: |
| 560 | case ACPI_TYPE_STRING: |
| 561 | case ACPI_TYPE_BUFFER: |
| 562 | /* |
| 563 | * For these very simple sub-objects, we can just |
| 564 | * update the reference count here and continue. |
| 565 | * Greatly increases performance of this operation. |
| 566 | */ |
| 567 | acpi_ut_update_ref_count(next_object, |
| 568 | action); |
| 569 | break; |
| 570 | |
| 571 | default: |
| 572 | /* |
| 573 | * For complex sub-objects, push them onto the stack |
| 574 | * for later processing (this eliminates recursion.) |
| 575 | */ |
| 576 | status = |
| 577 | acpi_ut_create_update_state_and_push |
| 578 | (next_object, action, &state_list); |
| 579 | if (ACPI_FAILURE(status)) { |
| 580 | goto error_exit; |
| 581 | } |
| 582 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 583 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 584 | } |
Chao Guan | 5393855 | 2012-12-19 05:37:53 +0000 | [diff] [blame] | 585 | next_object = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 586 | break; |
| 587 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 588 | case ACPI_TYPE_BUFFER_FIELD: |
| 589 | |
Robert Moore | f9f4601 | 2005-07-08 00:00:00 -0400 | [diff] [blame] | 590 | next_object = object->buffer_field.buffer_obj; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 591 | break; |
| 592 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 593 | case ACPI_TYPE_LOCAL_REGION_FIELD: |
| 594 | |
Robert Moore | f9f4601 | 2005-07-08 00:00:00 -0400 | [diff] [blame] | 595 | next_object = object->field.region_obj; |
| 596 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 597 | |
| 598 | case ACPI_TYPE_LOCAL_BANK_FIELD: |
| 599 | |
Robert Moore | f9f4601 | 2005-07-08 00:00:00 -0400 | [diff] [blame] | 600 | next_object = object->bank_field.bank_obj; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 601 | status = |
| 602 | acpi_ut_create_update_state_and_push(object-> |
| 603 | bank_field. |
| 604 | region_obj, |
| 605 | action, |
| 606 | &state_list); |
| 607 | if (ACPI_FAILURE(status)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 608 | goto error_exit; |
| 609 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 610 | break; |
| 611 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 612 | case ACPI_TYPE_LOCAL_INDEX_FIELD: |
| 613 | |
Robert Moore | f9f4601 | 2005-07-08 00:00:00 -0400 | [diff] [blame] | 614 | next_object = object->index_field.index_obj; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 615 | status = |
| 616 | acpi_ut_create_update_state_and_push(object-> |
| 617 | index_field. |
| 618 | data_obj, |
| 619 | action, |
| 620 | &state_list); |
| 621 | if (ACPI_FAILURE(status)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 622 | goto error_exit; |
| 623 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 624 | break; |
| 625 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 626 | case ACPI_TYPE_LOCAL_REFERENCE: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 627 | /* |
Bob Moore | 9e41d93 | 2008-04-10 19:06:39 +0400 | [diff] [blame] | 628 | * The target of an Index (a package, string, or buffer) or a named |
| 629 | * reference must track changes to the ref count of the index or |
| 630 | * target object. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 631 | */ |
Bob Moore | 1044f1f | 2008-09-27 11:08:41 +0800 | [diff] [blame] | 632 | if ((object->reference.class == ACPI_REFCLASS_INDEX) || |
| 633 | (object->reference.class == ACPI_REFCLASS_NAME)) { |
Robert Moore | f9f4601 | 2005-07-08 00:00:00 -0400 | [diff] [blame] | 634 | next_object = object->reference.object; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 635 | } |
| 636 | break; |
| 637 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 638 | case ACPI_TYPE_REGION: |
| 639 | default: |
Chao Guan | 1d1ea1b7 | 2013-06-08 00:58:14 +0000 | [diff] [blame] | 640 | |
Bob Moore | 4119532 | 2006-05-26 16:36:00 -0400 | [diff] [blame] | 641 | break; /* No subobjects for all other types */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 642 | } |
| 643 | |
| 644 | /* |
Bob Moore | 4119532 | 2006-05-26 16:36:00 -0400 | [diff] [blame] | 645 | * Now we can update the count in the main object. This can only |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 646 | * happen after we update the sub-objects in case this causes the |
| 647 | * main object to be deleted. |
| 648 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 649 | acpi_ut_update_ref_count(object, action); |
Robert Moore | f9f4601 | 2005-07-08 00:00:00 -0400 | [diff] [blame] | 650 | object = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 651 | |
| 652 | /* Move on to the next object to be updated */ |
| 653 | |
Robert Moore | f9f4601 | 2005-07-08 00:00:00 -0400 | [diff] [blame] | 654 | if (next_object) { |
| 655 | object = next_object; |
| 656 | next_object = NULL; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 657 | } else if (state_list) { |
| 658 | state = acpi_ut_pop_generic_state(&state_list); |
Robert Moore | f9f4601 | 2005-07-08 00:00:00 -0400 | [diff] [blame] | 659 | object = state->update.object; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 660 | acpi_ut_delete_generic_state(state); |
Robert Moore | f9f4601 | 2005-07-08 00:00:00 -0400 | [diff] [blame] | 661 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 662 | } |
| 663 | |
Bob Moore | 0e770b3 | 2012-12-19 05:37:59 +0000 | [diff] [blame] | 664 | return (AE_OK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 665 | |
Lv Zheng | 10622bf | 2013-10-29 09:30:02 +0800 | [diff] [blame] | 666 | error_exit: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 667 | |
Bob Moore | b8e4d89 | 2006-01-27 16:43:00 -0500 | [diff] [blame] | 668 | ACPI_EXCEPTION((AE_INFO, status, |
| 669 | "Could not update object reference count")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 670 | |
Lin Ming | cf058bd | 2008-09-27 11:29:57 +0800 | [diff] [blame] | 671 | /* Free any stacked Update State objects */ |
| 672 | |
| 673 | while (state_list) { |
| 674 | state = acpi_ut_pop_generic_state(&state_list); |
| 675 | acpi_ut_delete_generic_state(state); |
| 676 | } |
| 677 | |
Bob Moore | 0e770b3 | 2012-12-19 05:37:59 +0000 | [diff] [blame] | 678 | return (status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 679 | } |
| 680 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 681 | /******************************************************************************* |
| 682 | * |
| 683 | * FUNCTION: acpi_ut_add_reference |
| 684 | * |
Bob Moore | ba494be | 2012-07-12 09:40:10 +0800 | [diff] [blame] | 685 | * PARAMETERS: object - Object whose reference count is to be |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 686 | * incremented |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 687 | * |
| 688 | * RETURN: None |
| 689 | * |
| 690 | * DESCRIPTION: Add one reference to an ACPI object |
| 691 | * |
| 692 | ******************************************************************************/ |
| 693 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 694 | void acpi_ut_add_reference(union acpi_operand_object *object) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 695 | { |
| 696 | |
Bob Moore | 0e770b3 | 2012-12-19 05:37:59 +0000 | [diff] [blame] | 697 | ACPI_FUNCTION_NAME(ut_add_reference); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 698 | |
| 699 | /* Ensure that we have a valid object */ |
| 700 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 701 | if (!acpi_ut_valid_internal_object(object)) { |
Bob Moore | 0e770b3 | 2012-12-19 05:37:59 +0000 | [diff] [blame] | 702 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 703 | } |
| 704 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 705 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
| 706 | "Obj %p Current Refs=%X [To Be Incremented]\n", |
| 707 | object, object->common.reference_count)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 708 | |
| 709 | /* Increment the reference count */ |
| 710 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 711 | (void)acpi_ut_update_object_reference(object, REF_INCREMENT); |
Bob Moore | 0e770b3 | 2012-12-19 05:37:59 +0000 | [diff] [blame] | 712 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 713 | } |
| 714 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 715 | /******************************************************************************* |
| 716 | * |
| 717 | * FUNCTION: acpi_ut_remove_reference |
| 718 | * |
Bob Moore | ba494be | 2012-07-12 09:40:10 +0800 | [diff] [blame] | 719 | * PARAMETERS: object - Object whose ref count will be decremented |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 720 | * |
| 721 | * RETURN: None |
| 722 | * |
| 723 | * DESCRIPTION: Decrement the reference count of an ACPI internal object |
| 724 | * |
| 725 | ******************************************************************************/ |
| 726 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 727 | void acpi_ut_remove_reference(union acpi_operand_object *object) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 728 | { |
| 729 | |
Bob Moore | 0e770b3 | 2012-12-19 05:37:59 +0000 | [diff] [blame] | 730 | ACPI_FUNCTION_NAME(ut_remove_reference); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 731 | |
| 732 | /* |
Bob Moore | 4119532 | 2006-05-26 16:36:00 -0400 | [diff] [blame] | 733 | * Allow a NULL pointer to be passed in, just ignore it. This saves |
| 734 | * each caller from having to check. Also, ignore NS nodes. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 735 | */ |
| 736 | if (!object || |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 737 | (ACPI_GET_DESCRIPTOR_TYPE(object) == ACPI_DESC_TYPE_NAMED)) { |
Bob Moore | 0e770b3 | 2012-12-19 05:37:59 +0000 | [diff] [blame] | 738 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 739 | } |
| 740 | |
| 741 | /* Ensure that we have a valid object */ |
| 742 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 743 | if (!acpi_ut_valid_internal_object(object)) { |
Bob Moore | 0e770b3 | 2012-12-19 05:37:59 +0000 | [diff] [blame] | 744 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 745 | } |
| 746 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 747 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
| 748 | "Obj %p Current Refs=%X [To Be Decremented]\n", |
| 749 | object, object->common.reference_count)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 750 | |
| 751 | /* |
| 752 | * Decrement the reference count, and only actually delete the object |
Bob Moore | 4119532 | 2006-05-26 16:36:00 -0400 | [diff] [blame] | 753 | * if the reference count becomes 0. (Must also decrement the ref count |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 754 | * of all subobjects!) |
| 755 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 756 | (void)acpi_ut_update_object_reference(object, REF_DECREMENT); |
Bob Moore | 0e770b3 | 2012-12-19 05:37:59 +0000 | [diff] [blame] | 757 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 758 | } |