err.no Git - linux-2.6/blob - drivers/acpi/hardware/hwsleep.c

   1
   2 /******************************************************************************
   3  *
   4  * Name: hwsleep.c - ACPI Hardware Sleep/Wake Interface
   5  *
   6  *****************************************************************************/
   7
   8 /*
   9  * Copyright (C) 2000 - 2007, R. Byron Moore
  10  * All rights reserved.
  11  *
  12  * Redistribution and use in source and binary forms, with or without
  13  * modification, are permitted provided that the following conditions
  14  * are met:
  15  * 1. Redistributions of source code must retain the above copyright
  16  *    notice, this list of conditions, and the following disclaimer,
  17  *    without modification.
  18  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
  19  *    substantially similar to the "NO WARRANTY" disclaimer below
  20  *    ("Disclaimer") and any redistribution must be conditioned upon
  21  *    including a substantially similar Disclaimer requirement for further
  22  *    binary redistribution.
  23  * 3. Neither the names of the above-listed copyright holders nor the names
  24  *    of any contributors may be used to endorse or promote products derived
  25  *    from this software without specific prior written permission.
  26  *
  27  * Alternatively, this software may be distributed under the terms of the
  28  * GNU General Public License ("GPL") version 2 as published by the Free
  29  * Software Foundation.
  30  *
  31  * NO WARRANTY
  32  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  33  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  34  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
  35  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  36  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  37  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  38  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  39  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  40  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  41  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  42  * POSSIBILITY OF SUCH DAMAGES.
  43  */
  44
  45 #include <acpi/acpi.h>
  46 #include <acpi/actables.h>
  47
  48 #define _COMPONENT          ACPI_HARDWARE
  49 ACPI_MODULE_NAME("hwsleep")
  50
  51 /*******************************************************************************
  52  *
  53  * FUNCTION:    acpi_set_firmware_waking_vector
  54  *
  55  * PARAMETERS:  physical_address    - Physical address of ACPI real mode
  56  *                                    entry point.
  57  *
  58  * RETURN:      Status
  59  *
  60  * DESCRIPTION: Access function for the firmware_waking_vector field in FACS
  61  *
  62  ******************************************************************************/
  63 acpi_status
  64 acpi_set_firmware_waking_vector(acpi_physical_address physical_address)
  65 {
  66         struct acpi_table_facs *facs;
  67         acpi_status status;
  68
  69         ACPI_FUNCTION_TRACE(acpi_set_firmware_waking_vector);
  70
  71         /* Get the FACS */
  72
  73         status =
  74             acpi_get_table_by_index(ACPI_TABLE_INDEX_FACS,
  75                                     (struct acpi_table_header **)&facs);
  76         if (ACPI_FAILURE(status)) {
  77                 return_ACPI_STATUS(status);
  78         }
  79
  80         /* Set the vector */
  81
  82         if ((facs->length < 32) || (!(facs->xfirmware_waking_vector))) {
  83                 /*
  84                  * ACPI 1.0 FACS or short table or optional X_ field is zero
  85                  */
  86                 facs->firmware_waking_vector = (u32) physical_address;
  87         } else {
  88                 /*
  89                  * ACPI 2.0 FACS with valid X_ field
  90                  */
  91                 facs->xfirmware_waking_vector = physical_address;
  92         }
  93
  94         return_ACPI_STATUS(AE_OK);
  95 }
  96
  97 ACPI_EXPORT_SYMBOL(acpi_set_firmware_waking_vector)
  98
  99 /*******************************************************************************
 100  *
 101  * FUNCTION:    acpi_get_firmware_waking_vector
 102  *
 103  * PARAMETERS:  *physical_address   - Where the contents of
 104  *                                    the firmware_waking_vector field of
 105  *                                    the FACS will be returned.
 106  *
 107  * RETURN:      Status, vector
 108  *
 109  * DESCRIPTION: Access function for the firmware_waking_vector field in FACS
 110  *
 111  ******************************************************************************/
 112 #ifdef ACPI_FUTURE_USAGE
 113 acpi_status
 114 acpi_get_firmware_waking_vector(acpi_physical_address * physical_address)
 115 {
 116         struct acpi_table_facs *facs;
 117         acpi_status status;
 118
 119         ACPI_FUNCTION_TRACE(acpi_get_firmware_waking_vector);
 120
 121         if (!physical_address) {
 122                 return_ACPI_STATUS(AE_BAD_PARAMETER);
 123         }
 124
 125         /* Get the FACS */
 126
 127         status =
 128             acpi_get_table_by_index(ACPI_TABLE_INDEX_FACS,
 129                                     (struct acpi_table_header **)&facs);
 130         if (ACPI_FAILURE(status)) {
 131                 return_ACPI_STATUS(status);
 132         }
 133
 134         /* Get the vector */
 135
 136         if ((facs->length < 32) || (!(facs->xfirmware_waking_vector))) {
 137                 /*
 138                  * ACPI 1.0 FACS or short table or optional X_ field is zero
 139                  */
 140                 *physical_address =
 141                     (acpi_physical_address) facs->firmware_waking_vector;
 142         } else {
 143                 /*
 144                  * ACPI 2.0 FACS with valid X_ field
 145                  */
 146                 *physical_address =
 147                     (acpi_physical_address) facs->xfirmware_waking_vector;
 148         }
 149
 150         return_ACPI_STATUS(AE_OK);
 151 }
 152
 153 ACPI_EXPORT_SYMBOL(acpi_get_firmware_waking_vector)
 154 #endif
 155 /*******************************************************************************
 156  *
 157  * FUNCTION:    acpi_enter_sleep_state_prep
 158  *
 159  * PARAMETERS:  sleep_state         - Which sleep state to enter
 160  *
 161  * RETURN:      Status
 162  *
 163  * DESCRIPTION: Prepare to enter a system sleep state (see ACPI 2.0 spec p 231)
 164  *              This function must execute with interrupts enabled.
 165  *              We break sleeping into 2 stages so that OSPM can handle
 166  *              various OS-specific tasks between the two steps.
 167  *
 168  ******************************************************************************/
 169 acpi_status acpi_enter_sleep_state_prep(u8 sleep_state)
 170 {
 171         acpi_status status;
 172         struct acpi_object_list arg_list;
 173         union acpi_object arg;
 174
 175         ACPI_FUNCTION_TRACE(acpi_enter_sleep_state_prep);
 176
 177         /*
 178          * _PSW methods could be run here to enable wake-on keyboard, LAN, etc.
 179          */
 180         status = acpi_get_sleep_type_data(sleep_state,
 181                                           &acpi_gbl_sleep_type_a,
 182                                           &acpi_gbl_sleep_type_b);
 183         if (ACPI_FAILURE(status)) {
 184                 return_ACPI_STATUS(status);
 185         }
 186
 187         /* Setup parameter object */
 188
 189         arg_list.count = 1;
 190         arg_list.pointer = &arg;
 191
 192         arg.type = ACPI_TYPE_INTEGER;
 193         arg.integer.value = sleep_state;
 194
 195         /* Run the _PTS and _GTS methods */
 196
 197         status = acpi_evaluate_object(NULL, METHOD_NAME__PTS, &arg_list, NULL);
 198         if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
 199                 return_ACPI_STATUS(status);
 200         }
 201
 202         status = acpi_evaluate_object(NULL, METHOD_NAME__GTS, &arg_list, NULL);
 203         if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
 204                 return_ACPI_STATUS(status);
 205         }
 206
 207         /* Setup the argument to _SST */
 208
 209         switch (sleep_state) {
 210         case ACPI_STATE_S0:
 211                 arg.integer.value = ACPI_SST_WORKING;
 212                 break;
 213
 214         case ACPI_STATE_S1:
 215         case ACPI_STATE_S2:
 216         case ACPI_STATE_S3:
 217                 arg.integer.value = ACPI_SST_SLEEPING;
 218                 break;
 219
 220         case ACPI_STATE_S4:
 221                 arg.integer.value = ACPI_SST_SLEEP_CONTEXT;
 222                 break;
 223
 224         default:
 225                 arg.integer.value = ACPI_SST_INDICATOR_OFF;     /* Default is off */
 226                 break;
 227         }
 228
 229         /* Set the system indicators to show the desired sleep state. */
 230
 231         status = acpi_evaluate_object(NULL, METHOD_NAME__SST, &arg_list, NULL);
 232         if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
 233                 ACPI_EXCEPTION((AE_INFO, status,
 234                                 "While executing method _SST"));
 235         }
 236
 237         /*
 238          * 1) Disable/Clear all GPEs
 239          */
 240         status = acpi_hw_disable_all_gpes();
 241         if (ACPI_FAILURE(status)) {
 242                 return_ACPI_STATUS(status);
 243         }
 244
 245         return_ACPI_STATUS(AE_OK);
 246 }
 247
 248 ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state_prep)
 249
 250 /*******************************************************************************
 251  *
 252  * FUNCTION:    acpi_enter_sleep_state
 253  *
 254  * PARAMETERS:  sleep_state         - Which sleep state to enter
 255  *
 256  * RETURN:      Status
 257  *
 258  * DESCRIPTION: Enter a system sleep state (see ACPI 2.0 spec p 231)
 259  *              THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED
 260  *
 261  ******************************************************************************/
 262 acpi_status asmlinkage acpi_enter_sleep_state(u8 sleep_state)
 263 {
 264         u32 PM1Acontrol;
 265         u32 PM1Bcontrol;
 266         struct acpi_bit_register_info *sleep_type_reg_info;
 267         struct acpi_bit_register_info *sleep_enable_reg_info;
 268         u32 in_value;
 269         acpi_status status;
 270
 271         ACPI_FUNCTION_TRACE(acpi_enter_sleep_state);
 272
 273         if ((acpi_gbl_sleep_type_a > ACPI_SLEEP_TYPE_MAX) ||
 274             (acpi_gbl_sleep_type_b > ACPI_SLEEP_TYPE_MAX)) {
 275                 ACPI_ERROR((AE_INFO, "Sleep values out of range: A=%X B=%X",
 276                             acpi_gbl_sleep_type_a, acpi_gbl_sleep_type_b));
 277                 return_ACPI_STATUS(AE_AML_OPERAND_VALUE);
 278         }
 279
 280         sleep_type_reg_info =
 281             acpi_hw_get_bit_register_info(ACPI_BITREG_SLEEP_TYPE_A);
 282         sleep_enable_reg_info =
 283             acpi_hw_get_bit_register_info(ACPI_BITREG_SLEEP_ENABLE);
 284
 285         /* Clear wake status */
 286
 287         status = acpi_set_register(ACPI_BITREG_WAKE_STATUS, 1);
 288         if (ACPI_FAILURE(status)) {
 289                 return_ACPI_STATUS(status);
 290         }
 291
 292         /* Clear all fixed and general purpose status bits */
 293
 294         status = acpi_hw_clear_acpi_status();
 295         if (ACPI_FAILURE(status)) {
 296                 return_ACPI_STATUS(status);
 297         }
 298
 299         /*
 300          * 2) Enable all wakeup GPEs
 301          */
 302         status = acpi_hw_disable_all_gpes();
 303         if (ACPI_FAILURE(status)) {
 304                 return_ACPI_STATUS(status);
 305         }
 306
 307         acpi_gbl_system_awake_and_running = FALSE;
 308
 309         status = acpi_hw_enable_all_wakeup_gpes();
 310         if (ACPI_FAILURE(status)) {
 311                 return_ACPI_STATUS(status);
 312         }
 313
 314         /* Get current value of PM1A control */
 315
 316         status = acpi_hw_register_read(ACPI_REGISTER_PM1_CONTROL, &PM1Acontrol);
 317         if (ACPI_FAILURE(status)) {
 318                 return_ACPI_STATUS(status);
 319         }
 320         ACPI_DEBUG_PRINT((ACPI_DB_INIT,
 321                           "Entering sleep state [S%d]\n", sleep_state));
 322
 323         /* Clear SLP_EN and SLP_TYP fields */
 324
 325         PM1Acontrol &= ~(sleep_type_reg_info->access_bit_mask |
 326                          sleep_enable_reg_info->access_bit_mask);
 327         PM1Bcontrol = PM1Acontrol;
 328
 329         /* Insert SLP_TYP bits */
 330
 331         PM1Acontrol |=
 332             (acpi_gbl_sleep_type_a << sleep_type_reg_info->bit_position);
 333         PM1Bcontrol |=
 334             (acpi_gbl_sleep_type_b << sleep_type_reg_info->bit_position);
 335
 336         /*
 337          * We split the writes of SLP_TYP and SLP_EN to workaround
 338          * poorly implemented hardware.
 339          */
 340
 341         /* Write #1: fill in SLP_TYP data */
 342
 343         status = acpi_hw_register_write(ACPI_REGISTER_PM1A_CONTROL,
 344                                         PM1Acontrol);
 345         if (ACPI_FAILURE(status)) {
 346                 return_ACPI_STATUS(status);
 347         }
 348
 349         status = acpi_hw_register_write(ACPI_REGISTER_PM1B_CONTROL,
 350                                         PM1Bcontrol);
 351         if (ACPI_FAILURE(status)) {
 352                 return_ACPI_STATUS(status);
 353         }
 354
 355         /* Insert SLP_ENABLE bit */
 356
 357         PM1Acontrol |= sleep_enable_reg_info->access_bit_mask;
 358         PM1Bcontrol |= sleep_enable_reg_info->access_bit_mask;
 359
 360         /* Write #2: SLP_TYP + SLP_EN */
 361
 362         ACPI_FLUSH_CPU_CACHE();
 363
 364         status = acpi_hw_register_write(ACPI_REGISTER_PM1A_CONTROL,
 365                                         PM1Acontrol);
 366         if (ACPI_FAILURE(status)) {
 367                 return_ACPI_STATUS(status);
 368         }
 369
 370         status = acpi_hw_register_write(ACPI_REGISTER_PM1B_CONTROL,
 371                                         PM1Bcontrol);
 372         if (ACPI_FAILURE(status)) {
 373                 return_ACPI_STATUS(status);
 374         }
 375
 376         if (sleep_state > ACPI_STATE_S3) {
 377                 /*
 378                  * We wanted to sleep > S3, but it didn't happen (by virtue of the
 379                  * fact that we are still executing!)
 380                  *
 381                  * Wait ten seconds, then try again. This is to get S4/S5 to work on
 382                  * all machines.
 383                  *
 384                  * We wait so long to allow chipsets that poll this reg very slowly to
 385                  * still read the right value. Ideally, this block would go
 386                  * away entirely.
 387                  */
 388                 acpi_os_stall(10000000);
 389
 390                 status = acpi_hw_register_write(ACPI_REGISTER_PM1_CONTROL,
 391                                                 sleep_enable_reg_info->
 392                                                 access_bit_mask);
 393                 if (ACPI_FAILURE(status)) {
 394                         return_ACPI_STATUS(status);
 395                 }
 396         }
 397
 398         /* Wait until we enter sleep state */
 399
 400         do {
 401                 status = acpi_get_register(ACPI_BITREG_WAKE_STATUS, &in_value);
 402                 if (ACPI_FAILURE(status)) {
 403                         return_ACPI_STATUS(status);
 404                 }
 405
 406                 /* Spin until we wake */
 407
 408         } while (!in_value);
 409
 410         return_ACPI_STATUS(AE_OK);
 411 }
 412
 413 ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state)
 414
 415 /*******************************************************************************
 416  *
 417  * FUNCTION:    acpi_enter_sleep_state_s4bios
 418  *
 419  * PARAMETERS:  None
 420  *
 421  * RETURN:      Status
 422  *
 423  * DESCRIPTION: Perform a S4 bios request.
 424  *              THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED
 425  *
 426  ******************************************************************************/
 427 acpi_status asmlinkage acpi_enter_sleep_state_s4bios(void)
 428 {
 429         u32 in_value;
 430         acpi_status status;
 431
 432         ACPI_FUNCTION_TRACE(acpi_enter_sleep_state_s4bios);
 433
 434         status = acpi_set_register(ACPI_BITREG_WAKE_STATUS, 1);
 435         if (ACPI_FAILURE(status)) {
 436                 return_ACPI_STATUS(status);
 437         }
 438
 439         status = acpi_hw_clear_acpi_status();
 440         if (ACPI_FAILURE(status)) {
 441                 return_ACPI_STATUS(status);
 442         }
 443
 444         /*
 445          * 1) Disable/Clear all GPEs
 446          * 2) Enable all wakeup GPEs
 447          */
 448         status = acpi_hw_disable_all_gpes();
 449         if (ACPI_FAILURE(status)) {
 450                 return_ACPI_STATUS(status);
 451         }
 452         acpi_gbl_system_awake_and_running = FALSE;
 453
 454         status = acpi_hw_enable_all_wakeup_gpes();
 455         if (ACPI_FAILURE(status)) {
 456                 return_ACPI_STATUS(status);
 457         }
 458
 459         ACPI_FLUSH_CPU_CACHE();
 460
 461         status = acpi_os_write_port(acpi_gbl_FADT.smi_command,
 462                                     (u32) acpi_gbl_FADT.S4bios_request, 8);
 463
 464         do {
 465                 acpi_os_stall(1000);
 466                 status = acpi_get_register(ACPI_BITREG_WAKE_STATUS, &in_value);
 467                 if (ACPI_FAILURE(status)) {
 468                         return_ACPI_STATUS(status);
 469                 }
 470         } while (!in_value);
 471
 472         return_ACPI_STATUS(AE_OK);
 473 }
 474
 475 ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state_s4bios)
 476
 477 /*******************************************************************************
 478  *
 479  * FUNCTION:    acpi_leave_sleep_state
 480  *
 481  * PARAMETERS:  sleep_state         - Which sleep state we just exited
 482  *
 483  * RETURN:      Status
 484  *
 485  * DESCRIPTION: Perform OS-independent ACPI cleanup after a sleep
 486  *              Called with interrupts ENABLED.
 487  *
 488  ******************************************************************************/
 489 acpi_status acpi_leave_sleep_state(u8 sleep_state)
 490 {
 491         struct acpi_object_list arg_list;
 492         union acpi_object arg;
 493         acpi_status status;
 494         struct acpi_bit_register_info *sleep_type_reg_info;
 495         struct acpi_bit_register_info *sleep_enable_reg_info;
 496         u32 PM1Acontrol;
 497         u32 PM1Bcontrol;
 498
 499         ACPI_FUNCTION_TRACE(acpi_leave_sleep_state);
 500
 501         /*
 502          * Set SLP_TYPE and SLP_EN to state S0.
 503          * This is unclear from the ACPI Spec, but it is required
 504          * by some machines.
 505          */
 506         status = acpi_get_sleep_type_data(ACPI_STATE_S0,
 507                                           &acpi_gbl_sleep_type_a,
 508                                           &acpi_gbl_sleep_type_b);
 509         if (ACPI_SUCCESS(status)) {
 510                 sleep_type_reg_info =
 511                     acpi_hw_get_bit_register_info(ACPI_BITREG_SLEEP_TYPE_A);
 512                 sleep_enable_reg_info =
 513                     acpi_hw_get_bit_register_info(ACPI_BITREG_SLEEP_ENABLE);
 514
 515                 /* Get current value of PM1A control */
 516
 517                 status = acpi_hw_register_read(ACPI_REGISTER_PM1_CONTROL,
 518                                                &PM1Acontrol);
 519                 if (ACPI_SUCCESS(status)) {
 520
 521                         /* Clear SLP_EN and SLP_TYP fields */
 522
 523                         PM1Acontrol &= ~(sleep_type_reg_info->access_bit_mask |
 524                                          sleep_enable_reg_info->
 525                                          access_bit_mask);
 526                         PM1Bcontrol = PM1Acontrol;
 527
 528                         /* Insert SLP_TYP bits */
 529
 530                         PM1Acontrol |=
 531                             (acpi_gbl_sleep_type_a << sleep_type_reg_info->
 532                              bit_position);
 533                         PM1Bcontrol |=
 534                             (acpi_gbl_sleep_type_b << sleep_type_reg_info->
 535                              bit_position);
 536
 537                         /* Just ignore any errors */
 538
 539                         (void)acpi_hw_register_write(ACPI_REGISTER_PM1A_CONTROL,
 540                                                      PM1Acontrol);
 541                         (void)acpi_hw_register_write(ACPI_REGISTER_PM1B_CONTROL,
 542                                                      PM1Bcontrol);
 543                 }
 544         }
 545
 546         /* Ensure enter_sleep_state_prep -> enter_sleep_state ordering */
 547
 548         acpi_gbl_sleep_type_a = ACPI_SLEEP_TYPE_INVALID;
 549
 550         /* Setup parameter object */
 551
 552         arg_list.count = 1;
 553         arg_list.pointer = &arg;
 554         arg.type = ACPI_TYPE_INTEGER;
 555
 556         /* Ignore any errors from these methods */
 557
 558         arg.integer.value = ACPI_SST_WAKING;
 559         status = acpi_evaluate_object(NULL, METHOD_NAME__SST, &arg_list, NULL);
 560         if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
 561                 ACPI_EXCEPTION((AE_INFO, status, "During Method _SST"));
 562         }
 563
 564         arg.integer.value = sleep_state;
 565         status = acpi_evaluate_object(NULL, METHOD_NAME__BFS, &arg_list, NULL);
 566         if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
 567                 ACPI_EXCEPTION((AE_INFO, status, "During Method _BFS"));
 568         }
 569
 570         /*
 571          * GPEs must be enabled before _WAK is called as GPEs
 572          * might get fired there
 573          *
 574          * Restore the GPEs:
 575          * 1) Disable/Clear all GPEs
 576          * 2) Enable all runtime GPEs
 577          */
 578         status = acpi_hw_disable_all_gpes();
 579         if (ACPI_FAILURE(status)) {
 580                 return_ACPI_STATUS(status);
 581         }
 582         status = acpi_hw_enable_all_runtime_gpes();
 583         if (ACPI_FAILURE(status)) {
 584                 return_ACPI_STATUS(status);
 585         }
 586
 587         status = acpi_evaluate_object(NULL, METHOD_NAME__WAK, &arg_list, NULL);
 588         if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
 589                 ACPI_EXCEPTION((AE_INFO, status, "During Method _WAK"));
 590         }
 591         /* TBD: _WAK "sometimes" returns stuff - do we want to look at it? */
 592
 593         acpi_gbl_system_awake_and_running = TRUE;
 594
 595         /* Enable power button */
 596
 597         (void)
 598             acpi_set_register(acpi_gbl_fixed_event_info
 599                               [ACPI_EVENT_POWER_BUTTON].enable_register_id, 1);
 600
 601         (void)
 602             acpi_set_register(acpi_gbl_fixed_event_info
 603                               [ACPI_EVENT_POWER_BUTTON].status_register_id, 1);
 604
 605         arg.integer.value = ACPI_SST_WORKING;
 606         status = acpi_evaluate_object(NULL, METHOD_NAME__SST, &arg_list, NULL);
 607         if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
 608                 ACPI_EXCEPTION((AE_INFO, status, "During Method _SST"));
 609         }
 610
 611         return_ACPI_STATUS(status);
 612 }
 613
 614 ACPI_EXPORT_SYMBOL(acpi_leave_sleep_state)