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1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: tbinstal - ACPI table installation and removal | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
4a90c7e8 | 8 | * Copyright (C) 2000 - 2006, R. Byron Moore |
1da177e4 LT |
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 | ||
1da177e4 LT |
44 | #include <acpi/acpi.h> |
45 | #include <acpi/actables.h> | |
46 | ||
1da177e4 | 47 | #define _COMPONENT ACPI_TABLES |
4be44fcd | 48 | ACPI_MODULE_NAME("tbinstal") |
1da177e4 | 49 | |
44f6c012 | 50 | /* Local prototypes */ |
44f6c012 | 51 | static acpi_status |
4be44fcd LB |
52 | acpi_tb_match_signature(char *signature, |
53 | struct acpi_table_desc *table_info, u8 search_type); | |
1da177e4 LT |
54 | |
55 | /******************************************************************************* | |
56 | * | |
57 | * FUNCTION: acpi_tb_match_signature | |
58 | * | |
59 | * PARAMETERS: Signature - Table signature to match | |
60 | * table_info - Return data | |
44f6c012 | 61 | * search_type - Table type to match (primary/secondary) |
1da177e4 LT |
62 | * |
63 | * RETURN: Status | |
64 | * | |
65 | * DESCRIPTION: Compare signature against the list of "ACPI-subsystem-owned" | |
66 | * tables (DSDT/FADT/SSDT, etc.) Returns the table_type_iD on match. | |
67 | * | |
68 | ******************************************************************************/ | |
69 | ||
44f6c012 | 70 | static acpi_status |
4be44fcd LB |
71 | acpi_tb_match_signature(char *signature, |
72 | struct acpi_table_desc *table_info, u8 search_type) | |
1da177e4 | 73 | { |
4be44fcd | 74 | acpi_native_uint i; |
1da177e4 | 75 | |
b229cf92 | 76 | ACPI_FUNCTION_TRACE(tb_match_signature); |
1da177e4 | 77 | |
44f6c012 RM |
78 | /* Search for a signature match among the known table types */ |
79 | ||
b229cf92 | 80 | for (i = 0; i < (ACPI_TABLE_ID_MAX + 1); i++) { |
1da177e4 LT |
81 | if (!(acpi_gbl_table_data[i].flags & search_type)) { |
82 | continue; | |
83 | } | |
84 | ||
4be44fcd LB |
85 | if (!ACPI_STRNCMP(signature, acpi_gbl_table_data[i].signature, |
86 | acpi_gbl_table_data[i].sig_length)) { | |
52fc0b02 | 87 | |
1da177e4 LT |
88 | /* Found a signature match, return index if requested */ |
89 | ||
90 | if (table_info) { | |
91 | table_info->type = (u8) i; | |
92 | } | |
93 | ||
4be44fcd LB |
94 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
95 | "Table [%4.4s] is an ACPI table consumed by the core subsystem\n", | |
96 | (char *)acpi_gbl_table_data[i]. | |
97 | signature)); | |
1da177e4 | 98 | |
4be44fcd | 99 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
100 | } |
101 | } | |
102 | ||
4be44fcd LB |
103 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
104 | "Table [%4.4s] is not an ACPI table consumed by the core subsystem - ignored\n", | |
105 | (char *)signature)); | |
1da177e4 | 106 | |
4be44fcd | 107 | return_ACPI_STATUS(AE_TABLE_NOT_SUPPORTED); |
1da177e4 LT |
108 | } |
109 | ||
1da177e4 LT |
110 | /******************************************************************************* |
111 | * | |
112 | * FUNCTION: acpi_tb_install_table | |
113 | * | |
114 | * PARAMETERS: table_info - Return value from acpi_tb_get_table_body | |
115 | * | |
116 | * RETURN: Status | |
117 | * | |
0c9938cc | 118 | * DESCRIPTION: Install the table into the global data structures. |
1da177e4 LT |
119 | * |
120 | ******************************************************************************/ | |
121 | ||
4be44fcd | 122 | acpi_status acpi_tb_install_table(struct acpi_table_desc *table_info) |
1da177e4 | 123 | { |
4be44fcd | 124 | acpi_status status; |
1da177e4 | 125 | |
b229cf92 | 126 | ACPI_FUNCTION_TRACE(tb_install_table); |
1da177e4 LT |
127 | |
128 | /* Lock tables while installing */ | |
129 | ||
4be44fcd LB |
130 | status = acpi_ut_acquire_mutex(ACPI_MTX_TABLES); |
131 | if (ACPI_FAILURE(status)) { | |
b8e4d893 BM |
132 | ACPI_EXCEPTION((AE_INFO, status, |
133 | "Could not acquire table mutex")); | |
4be44fcd | 134 | return_ACPI_STATUS(status); |
1da177e4 LT |
135 | } |
136 | ||
0c9938cc RM |
137 | /* |
138 | * Ignore a table that is already installed. For example, some BIOS | |
139 | * ASL code will repeatedly attempt to load the same SSDT. | |
140 | */ | |
4be44fcd LB |
141 | status = acpi_tb_is_table_installed(table_info); |
142 | if (ACPI_FAILURE(status)) { | |
0c9938cc RM |
143 | goto unlock_and_exit; |
144 | } | |
145 | ||
1da177e4 LT |
146 | /* Install the table into the global data structure */ |
147 | ||
4be44fcd LB |
148 | status = acpi_tb_init_table_descriptor(table_info->type, table_info); |
149 | if (ACPI_FAILURE(status)) { | |
b8e4d893 BM |
150 | ACPI_EXCEPTION((AE_INFO, status, |
151 | "Could not install table [%4.4s]", | |
152 | table_info->pointer->signature)); | |
1da177e4 LT |
153 | } |
154 | ||
4be44fcd LB |
155 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "%s located at %p\n", |
156 | acpi_gbl_table_data[table_info->type].name, | |
157 | table_info->pointer)); | |
1da177e4 | 158 | |
4be44fcd LB |
159 | unlock_and_exit: |
160 | (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); | |
161 | return_ACPI_STATUS(status); | |
1da177e4 LT |
162 | } |
163 | ||
1da177e4 LT |
164 | /******************************************************************************* |
165 | * | |
166 | * FUNCTION: acpi_tb_recognize_table | |
167 | * | |
168 | * PARAMETERS: table_info - Return value from acpi_tb_get_table_body | |
44f6c012 | 169 | * search_type - Table type to match (primary/secondary) |
1da177e4 LT |
170 | * |
171 | * RETURN: Status | |
172 | * | |
173 | * DESCRIPTION: Check a table signature for a match against known table types | |
174 | * | |
175 | * NOTE: All table pointers are validated as follows: | |
176 | * 1) Table pointer must point to valid physical memory | |
177 | * 2) Signature must be 4 ASCII chars, even if we don't recognize the | |
178 | * name | |
179 | * 3) Table must be readable for length specified in the header | |
180 | * 4) Table checksum must be valid (with the exception of the FACS | |
181 | * which has no checksum for some odd reason) | |
182 | * | |
183 | ******************************************************************************/ | |
184 | ||
185 | acpi_status | |
4be44fcd | 186 | acpi_tb_recognize_table(struct acpi_table_desc *table_info, u8 search_type) |
1da177e4 | 187 | { |
4be44fcd LB |
188 | struct acpi_table_header *table_header; |
189 | acpi_status status; | |
1da177e4 | 190 | |
b229cf92 | 191 | ACPI_FUNCTION_TRACE(tb_recognize_table); |
1da177e4 LT |
192 | |
193 | /* Ensure that we have a valid table pointer */ | |
194 | ||
4be44fcd | 195 | table_header = (struct acpi_table_header *)table_info->pointer; |
1da177e4 | 196 | if (!table_header) { |
4be44fcd | 197 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
1da177e4 LT |
198 | } |
199 | ||
200 | /* | |
201 | * We only "recognize" a limited number of ACPI tables -- namely, the | |
202 | * ones that are used by the subsystem (DSDT, FADT, etc.) | |
203 | * | |
204 | * An AE_TABLE_NOT_SUPPORTED means that the table was not recognized. | |
205 | * This can be any one of many valid ACPI tables, it just isn't one of | |
206 | * the tables that is consumed by the core subsystem | |
207 | */ | |
4be44fcd LB |
208 | status = acpi_tb_match_signature(table_header->signature, |
209 | table_info, search_type); | |
210 | if (ACPI_FAILURE(status)) { | |
211 | return_ACPI_STATUS(status); | |
1da177e4 LT |
212 | } |
213 | ||
4be44fcd LB |
214 | status = acpi_tb_validate_table_header(table_header); |
215 | if (ACPI_FAILURE(status)) { | |
216 | return_ACPI_STATUS(status); | |
1da177e4 LT |
217 | } |
218 | ||
219 | /* Return the table type and length via the info struct */ | |
220 | ||
221 | table_info->length = (acpi_size) table_header->length; | |
4be44fcd | 222 | return_ACPI_STATUS(status); |
1da177e4 LT |
223 | } |
224 | ||
1da177e4 LT |
225 | /******************************************************************************* |
226 | * | |
227 | * FUNCTION: acpi_tb_init_table_descriptor | |
228 | * | |
229 | * PARAMETERS: table_type - The type of the table | |
230 | * table_info - A table info struct | |
231 | * | |
232 | * RETURN: None. | |
233 | * | |
234 | * DESCRIPTION: Install a table into the global data structs. | |
235 | * | |
236 | ******************************************************************************/ | |
237 | ||
238 | acpi_status | |
4be44fcd LB |
239 | acpi_tb_init_table_descriptor(acpi_table_type table_type, |
240 | struct acpi_table_desc *table_info) | |
1da177e4 | 241 | { |
4be44fcd LB |
242 | struct acpi_table_list *list_head; |
243 | struct acpi_table_desc *table_desc; | |
244 | acpi_status status; | |
1da177e4 | 245 | |
b229cf92 | 246 | ACPI_FUNCTION_TRACE_U32(tb_init_table_descriptor, table_type); |
1da177e4 LT |
247 | |
248 | /* Allocate a descriptor for this table */ | |
249 | ||
8313524a | 250 | table_desc = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_table_desc)); |
1da177e4 | 251 | if (!table_desc) { |
4be44fcd | 252 | return_ACPI_STATUS(AE_NO_MEMORY); |
1da177e4 LT |
253 | } |
254 | ||
f9f4601f RM |
255 | /* Get a new owner ID for the table */ |
256 | ||
4be44fcd LB |
257 | status = acpi_ut_allocate_owner_id(&table_desc->owner_id); |
258 | if (ACPI_FAILURE(status)) { | |
259 | return_ACPI_STATUS(status); | |
f9f4601f RM |
260 | } |
261 | ||
44f6c012 RM |
262 | /* Install the table into the global data structure */ |
263 | ||
1da177e4 LT |
264 | list_head = &acpi_gbl_table_lists[table_type]; |
265 | ||
266 | /* | |
267 | * Two major types of tables: 1) Only one instance is allowed. This | |
268 | * includes most ACPI tables such as the DSDT. 2) Multiple instances of | |
269 | * the table are allowed. This includes SSDT and PSDTs. | |
270 | */ | |
4be44fcd | 271 | if (ACPI_IS_SINGLE_TABLE(acpi_gbl_table_data[table_type].flags)) { |
1da177e4 LT |
272 | /* |
273 | * Only one table allowed, and a table has alread been installed | |
274 | * at this location, so return an error. | |
275 | */ | |
276 | if (list_head->next) { | |
8313524a | 277 | ACPI_FREE(table_desc); |
4be44fcd | 278 | return_ACPI_STATUS(AE_ALREADY_EXISTS); |
1da177e4 LT |
279 | } |
280 | ||
281 | table_desc->next = list_head->next; | |
282 | list_head->next = table_desc; | |
283 | ||
284 | if (table_desc->next) { | |
285 | table_desc->next->prev = table_desc; | |
286 | } | |
287 | ||
288 | list_head->count++; | |
4be44fcd | 289 | } else { |
1da177e4 LT |
290 | /* |
291 | * Link the new table in to the list of tables of this type. | |
292 | * Insert at the end of the list, order IS IMPORTANT. | |
293 | * | |
294 | * table_desc->Prev & Next are already NULL from calloc() | |
295 | */ | |
296 | list_head->count++; | |
297 | ||
298 | if (!list_head->next) { | |
299 | list_head->next = table_desc; | |
4be44fcd | 300 | } else { |
1da177e4 LT |
301 | table_desc->next = list_head->next; |
302 | ||
303 | while (table_desc->next->next) { | |
304 | table_desc->next = table_desc->next->next; | |
305 | } | |
306 | ||
307 | table_desc->next->next = table_desc; | |
308 | table_desc->prev = table_desc->next; | |
309 | table_desc->next = NULL; | |
310 | } | |
311 | } | |
312 | ||
313 | /* Finish initialization of the table descriptor */ | |
314 | ||
b229cf92 | 315 | table_desc->loaded_into_namespace = FALSE; |
4be44fcd LB |
316 | table_desc->type = (u8) table_type; |
317 | table_desc->pointer = table_info->pointer; | |
318 | table_desc->length = table_info->length; | |
319 | table_desc->allocation = table_info->allocation; | |
320 | table_desc->aml_start = (u8 *) (table_desc->pointer + 1), | |
b229cf92 BM |
321 | table_desc->aml_length = (u32) |
322 | (table_desc->length - (u32) sizeof(struct acpi_table_header)); | |
1da177e4 LT |
323 | |
324 | /* | |
325 | * Set the appropriate global pointer (if there is one) to point to the | |
326 | * newly installed table | |
327 | */ | |
328 | if (acpi_gbl_table_data[table_type].global_ptr) { | |
4be44fcd LB |
329 | *(acpi_gbl_table_data[table_type].global_ptr) = |
330 | table_info->pointer; | |
1da177e4 LT |
331 | } |
332 | ||
333 | /* Return Data */ | |
334 | ||
4be44fcd LB |
335 | table_info->owner_id = table_desc->owner_id; |
336 | table_info->installed_desc = table_desc; | |
4be44fcd | 337 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
338 | } |
339 | ||
1da177e4 LT |
340 | /******************************************************************************* |
341 | * | |
342 | * FUNCTION: acpi_tb_delete_all_tables | |
343 | * | |
344 | * PARAMETERS: None. | |
345 | * | |
346 | * RETURN: None. | |
347 | * | |
348 | * DESCRIPTION: Delete all internal ACPI tables | |
349 | * | |
350 | ******************************************************************************/ | |
351 | ||
4be44fcd | 352 | void acpi_tb_delete_all_tables(void) |
1da177e4 | 353 | { |
4be44fcd | 354 | acpi_table_type type; |
1da177e4 LT |
355 | |
356 | /* | |
357 | * Free memory allocated for ACPI tables | |
358 | * Memory can either be mapped or allocated | |
359 | */ | |
b229cf92 | 360 | for (type = 0; type < (ACPI_TABLE_ID_MAX + 1); type++) { |
4be44fcd | 361 | acpi_tb_delete_tables_by_type(type); |
1da177e4 LT |
362 | } |
363 | } | |
364 | ||
1da177e4 LT |
365 | /******************************************************************************* |
366 | * | |
367 | * FUNCTION: acpi_tb_delete_tables_by_type | |
368 | * | |
369 | * PARAMETERS: Type - The table type to be deleted | |
370 | * | |
371 | * RETURN: None. | |
372 | * | |
373 | * DESCRIPTION: Delete an internal ACPI table | |
374 | * Locks the ACPI table mutex | |
375 | * | |
376 | ******************************************************************************/ | |
377 | ||
4be44fcd | 378 | void acpi_tb_delete_tables_by_type(acpi_table_type type) |
1da177e4 | 379 | { |
4be44fcd LB |
380 | struct acpi_table_desc *table_desc; |
381 | u32 count; | |
382 | u32 i; | |
1da177e4 | 383 | |
b229cf92 | 384 | ACPI_FUNCTION_TRACE_U32(tb_delete_tables_by_type, type); |
1da177e4 | 385 | |
b229cf92 | 386 | if (type > ACPI_TABLE_ID_MAX) { |
1da177e4 LT |
387 | return_VOID; |
388 | } | |
389 | ||
4be44fcd | 390 | if (ACPI_FAILURE(acpi_ut_acquire_mutex(ACPI_MTX_TABLES))) { |
1da177e4 LT |
391 | return; |
392 | } | |
393 | ||
394 | /* Clear the appropriate "typed" global table pointer */ | |
395 | ||
396 | switch (type) { | |
b229cf92 | 397 | case ACPI_TABLE_ID_RSDP: |
1da177e4 LT |
398 | acpi_gbl_RSDP = NULL; |
399 | break; | |
400 | ||
b229cf92 | 401 | case ACPI_TABLE_ID_DSDT: |
1da177e4 LT |
402 | acpi_gbl_DSDT = NULL; |
403 | break; | |
404 | ||
b229cf92 | 405 | case ACPI_TABLE_ID_FADT: |
1da177e4 LT |
406 | acpi_gbl_FADT = NULL; |
407 | break; | |
408 | ||
b229cf92 | 409 | case ACPI_TABLE_ID_FACS: |
1da177e4 LT |
410 | acpi_gbl_FACS = NULL; |
411 | break; | |
412 | ||
b229cf92 | 413 | case ACPI_TABLE_ID_XSDT: |
1da177e4 LT |
414 | acpi_gbl_XSDT = NULL; |
415 | break; | |
416 | ||
b229cf92 BM |
417 | case ACPI_TABLE_ID_SSDT: |
418 | case ACPI_TABLE_ID_PSDT: | |
1da177e4 LT |
419 | default: |
420 | break; | |
421 | } | |
422 | ||
423 | /* | |
424 | * Free the table | |
425 | * 1) Get the head of the list | |
426 | */ | |
427 | table_desc = acpi_gbl_table_lists[type].next; | |
4be44fcd | 428 | count = acpi_gbl_table_lists[type].count; |
1da177e4 LT |
429 | |
430 | /* | |
431 | * 2) Walk the entire list, deleting both the allocated tables | |
432 | * and the table descriptors | |
433 | */ | |
434 | for (i = 0; i < count; i++) { | |
4be44fcd | 435 | table_desc = acpi_tb_uninstall_table(table_desc); |
1da177e4 LT |
436 | } |
437 | ||
4be44fcd | 438 | (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); |
1da177e4 LT |
439 | return_VOID; |
440 | } | |
441 | ||
1da177e4 LT |
442 | /******************************************************************************* |
443 | * | |
444 | * FUNCTION: acpi_tb_delete_single_table | |
445 | * | |
446 | * PARAMETERS: table_info - A table info struct | |
447 | * | |
448 | * RETURN: None. | |
449 | * | |
450 | * DESCRIPTION: Low-level free for a single ACPI table. Handles cases where | |
451 | * the table was allocated a buffer or was mapped. | |
452 | * | |
453 | ******************************************************************************/ | |
454 | ||
4be44fcd | 455 | void acpi_tb_delete_single_table(struct acpi_table_desc *table_desc) |
1da177e4 LT |
456 | { |
457 | ||
458 | /* Must have a valid table descriptor and pointer */ | |
459 | ||
4be44fcd | 460 | if ((!table_desc) || (!table_desc->pointer)) { |
1da177e4 LT |
461 | return; |
462 | } | |
463 | ||
464 | /* Valid table, determine type of memory allocation */ | |
465 | ||
466 | switch (table_desc->allocation) { | |
467 | case ACPI_MEM_NOT_ALLOCATED: | |
468 | break; | |
469 | ||
470 | case ACPI_MEM_ALLOCATED: | |
471 | ||
8313524a | 472 | ACPI_FREE(table_desc->pointer); |
1da177e4 LT |
473 | break; |
474 | ||
475 | case ACPI_MEM_MAPPED: | |
476 | ||
4be44fcd | 477 | acpi_os_unmap_memory(table_desc->pointer, table_desc->length); |
1da177e4 LT |
478 | break; |
479 | ||
480 | default: | |
481 | break; | |
482 | } | |
483 | } | |
484 | ||
1da177e4 LT |
485 | /******************************************************************************* |
486 | * | |
487 | * FUNCTION: acpi_tb_uninstall_table | |
488 | * | |
489 | * PARAMETERS: table_info - A table info struct | |
490 | * | |
491 | * RETURN: Pointer to the next table in the list (of same type) | |
492 | * | |
493 | * DESCRIPTION: Free the memory associated with an internal ACPI table that | |
494 | * is either installed or has never been installed. | |
495 | * Table mutex should be locked. | |
496 | * | |
497 | ******************************************************************************/ | |
498 | ||
4be44fcd LB |
499 | struct acpi_table_desc *acpi_tb_uninstall_table(struct acpi_table_desc |
500 | *table_desc) | |
1da177e4 | 501 | { |
4be44fcd | 502 | struct acpi_table_desc *next_desc; |
1da177e4 | 503 | |
b229cf92 | 504 | ACPI_FUNCTION_TRACE_PTR(tb_uninstall_table, table_desc); |
1da177e4 LT |
505 | |
506 | if (!table_desc) { | |
4be44fcd | 507 | return_PTR(NULL); |
1da177e4 LT |
508 | } |
509 | ||
510 | /* Unlink the descriptor from the doubly linked list */ | |
511 | ||
512 | if (table_desc->prev) { | |
513 | table_desc->prev->next = table_desc->next; | |
4be44fcd | 514 | } else { |
1da177e4 LT |
515 | /* Is first on list, update list head */ |
516 | ||
517 | acpi_gbl_table_lists[table_desc->type].next = table_desc->next; | |
518 | } | |
519 | ||
520 | if (table_desc->next) { | |
521 | table_desc->next->prev = table_desc->prev; | |
522 | } | |
523 | ||
524 | /* Free the memory allocated for the table itself */ | |
525 | ||
4be44fcd | 526 | acpi_tb_delete_single_table(table_desc); |
1da177e4 LT |
527 | |
528 | /* Free the table descriptor */ | |
529 | ||
530 | next_desc = table_desc->next; | |
8313524a | 531 | ACPI_FREE(table_desc); |
1da177e4 LT |
532 | |
533 | /* Return pointer to the next descriptor */ | |
534 | ||
4be44fcd | 535 | return_PTR(next_desc); |
1da177e4 | 536 | } |