X-Git-Url: http://pilppa.org/gitweb/?a=blobdiff_plain;f=drivers%2Facpi%2Fexecuter%2Fexsystem.c;h=9460baff30328f4c5565e2c5d671eabfdf4f634c;hb=21d37bbc65e39a26856de6b14be371ff24e0d03f;hp=ea9144f42e1f98f2b4a1d37143cfb09fe8ae060c;hpb=581249966ffeb0463bad1b0e087e1bb29ed53707;p=linux-2.6-omap-h63xx.git diff --git a/drivers/acpi/executer/exsystem.c b/drivers/acpi/executer/exsystem.c index ea9144f42e1..9460baff303 100644 --- a/drivers/acpi/executer/exsystem.c +++ b/drivers/acpi/executer/exsystem.c @@ -6,7 +6,7 @@ *****************************************************************************/ /* - * Copyright (C) 2000 - 2006, R. Byron Moore + * Copyright (C) 2000 - 2007, R. Byron Moore * All rights reserved. * * Redistribution and use in source and binary forms, with or without @@ -60,25 +60,25 @@ ACPI_MODULE_NAME("exsystem") * * DESCRIPTION: Implements a semaphore wait with a check to see if the * semaphore is available immediately. If it is not, the - * interpreter is released. + * interpreter is released before waiting. * ******************************************************************************/ -acpi_status acpi_ex_system_wait_semaphore(acpi_handle semaphore, u16 timeout) +acpi_status acpi_ex_system_wait_semaphore(acpi_semaphore semaphore, u16 timeout) { acpi_status status; - acpi_status status2; - ACPI_FUNCTION_TRACE("ex_system_wait_semaphore"); + ACPI_FUNCTION_TRACE(ex_system_wait_semaphore); - status = acpi_os_wait_semaphore(semaphore, 1, 0); + status = acpi_os_wait_semaphore(semaphore, 1, ACPI_DO_NOT_WAIT); if (ACPI_SUCCESS(status)) { return_ACPI_STATUS(status); } if (status == AE_TIME) { + /* We must wait, so unlock the interpreter */ - acpi_ex_exit_interpreter(); + acpi_ex_relinquish_interpreter(); status = acpi_os_wait_semaphore(semaphore, 1, timeout); @@ -88,12 +88,53 @@ acpi_status acpi_ex_system_wait_semaphore(acpi_handle semaphore, u16 timeout) /* Reacquire the interpreter */ - status2 = acpi_ex_enter_interpreter(); - if (ACPI_FAILURE(status2)) { - /* Report fatal error, could not acquire interpreter */ + acpi_ex_reacquire_interpreter(); + } + + return_ACPI_STATUS(status); +} - return_ACPI_STATUS(status2); - } +/******************************************************************************* + * + * FUNCTION: acpi_ex_system_wait_mutex + * + * PARAMETERS: Mutex - Mutex to wait on + * Timeout - Max time to wait + * + * RETURN: Status + * + * DESCRIPTION: Implements a mutex wait with a check to see if the + * mutex is available immediately. If it is not, the + * interpreter is released before waiting. + * + ******************************************************************************/ + +acpi_status acpi_ex_system_wait_mutex(acpi_mutex mutex, u16 timeout) +{ + acpi_status status; + + ACPI_FUNCTION_TRACE(ex_system_wait_mutex); + + status = acpi_os_acquire_mutex(mutex, ACPI_DO_NOT_WAIT); + if (ACPI_SUCCESS(status)) { + return_ACPI_STATUS(status); + } + + if (status == AE_TIME) { + + /* We must wait, so unlock the interpreter */ + + acpi_ex_relinquish_interpreter(); + + status = acpi_os_acquire_mutex(mutex, timeout); + + ACPI_DEBUG_PRINT((ACPI_DB_EXEC, + "*** Thread awake after blocking, %s\n", + acpi_format_exception(status))); + + /* Reacquire the interpreter */ + + acpi_ex_reacquire_interpreter(); } return_ACPI_STATUS(status); @@ -154,96 +195,18 @@ acpi_status acpi_ex_system_do_stall(u32 how_long) acpi_status acpi_ex_system_do_suspend(acpi_integer how_long) { - acpi_status status; - ACPI_FUNCTION_ENTRY(); /* Since this thread will sleep, we must release the interpreter */ - acpi_ex_exit_interpreter(); + acpi_ex_relinquish_interpreter(); acpi_os_sleep(how_long); /* And now we must get the interpreter again */ - status = acpi_ex_enter_interpreter(); - return (status); -} - -/******************************************************************************* - * - * FUNCTION: acpi_ex_system_acquire_mutex - * - * PARAMETERS: time_desc - The 'time to delay' object descriptor - * obj_desc - The object descriptor for this op - * - * RETURN: Status - * - * DESCRIPTION: Provides an access point to perform synchronization operations - * within the AML. This function will cause a lock to be generated - * for the Mutex pointed to by obj_desc. - * - ******************************************************************************/ - -acpi_status -acpi_ex_system_acquire_mutex(union acpi_operand_object * time_desc, - union acpi_operand_object * obj_desc) -{ - acpi_status status = AE_OK; - - ACPI_FUNCTION_TRACE_PTR("ex_system_acquire_mutex", obj_desc); - - if (!obj_desc) { - return_ACPI_STATUS(AE_BAD_PARAMETER); - } - - /* Support for the _GL_ Mutex object -- go get the global lock */ - - if (obj_desc->mutex.semaphore == acpi_gbl_global_lock_semaphore) { - status = - acpi_ev_acquire_global_lock((u16) time_desc->integer.value); - return_ACPI_STATUS(status); - } - - status = acpi_ex_system_wait_semaphore(obj_desc->mutex.semaphore, - (u16) time_desc->integer.value); - return_ACPI_STATUS(status); -} - -/******************************************************************************* - * - * FUNCTION: acpi_ex_system_release_mutex - * - * PARAMETERS: obj_desc - The object descriptor for this op - * - * RETURN: Status - * - * DESCRIPTION: Provides an access point to perform synchronization operations - * within the AML. This operation is a request to release a - * previously acquired Mutex. If the Mutex variable is set then - * it will be decremented. - * - ******************************************************************************/ - -acpi_status acpi_ex_system_release_mutex(union acpi_operand_object *obj_desc) -{ - acpi_status status = AE_OK; - - ACPI_FUNCTION_TRACE("ex_system_release_mutex"); - - if (!obj_desc) { - return_ACPI_STATUS(AE_BAD_PARAMETER); - } - - /* Support for the _GL_ Mutex object -- release the global lock */ - - if (obj_desc->mutex.semaphore == acpi_gbl_global_lock_semaphore) { - status = acpi_ev_release_global_lock(); - return_ACPI_STATUS(status); - } - - status = acpi_os_signal_semaphore(obj_desc->mutex.semaphore, 1); - return_ACPI_STATUS(status); + acpi_ex_reacquire_interpreter(); + return (AE_OK); } /******************************************************************************* @@ -259,14 +222,15 @@ acpi_status acpi_ex_system_release_mutex(union acpi_operand_object *obj_desc) * ******************************************************************************/ -acpi_status acpi_ex_system_signal_event(union acpi_operand_object *obj_desc) +acpi_status acpi_ex_system_signal_event(union acpi_operand_object * obj_desc) { acpi_status status = AE_OK; - ACPI_FUNCTION_TRACE("ex_system_signal_event"); + ACPI_FUNCTION_TRACE(ex_system_signal_event); if (obj_desc) { - status = acpi_os_signal_semaphore(obj_desc->event.semaphore, 1); + status = + acpi_os_signal_semaphore(obj_desc->event.os_semaphore, 1); } return_ACPI_STATUS(status); @@ -293,11 +257,11 @@ acpi_ex_system_wait_event(union acpi_operand_object *time_desc, { acpi_status status = AE_OK; - ACPI_FUNCTION_TRACE("ex_system_wait_event"); + ACPI_FUNCTION_TRACE(ex_system_wait_event); if (obj_desc) { status = - acpi_ex_system_wait_semaphore(obj_desc->event.semaphore, + acpi_ex_system_wait_semaphore(obj_desc->event.os_semaphore, (u16) time_desc->integer. value); } @@ -320,7 +284,7 @@ acpi_ex_system_wait_event(union acpi_operand_object *time_desc, acpi_status acpi_ex_system_reset_event(union acpi_operand_object *obj_desc) { acpi_status status = AE_OK; - void *temp_semaphore; + acpi_semaphore temp_semaphore; ACPI_FUNCTION_ENTRY(); @@ -331,8 +295,8 @@ acpi_status acpi_ex_system_reset_event(union acpi_operand_object *obj_desc) status = acpi_os_create_semaphore(ACPI_NO_UNIT_LIMIT, 0, &temp_semaphore); if (ACPI_SUCCESS(status)) { - (void)acpi_os_delete_semaphore(obj_desc->event.semaphore); - obj_desc->event.semaphore = temp_semaphore; + (void)acpi_os_delete_semaphore(obj_desc->event.os_semaphore); + obj_desc->event.os_semaphore = temp_semaphore; } return (status);