diff --git a/drivers/acpi/events/evmisc.c b/drivers/acpi/events/evmisc.c index 3a799b9b5df572da85d5bba7573bd798f1b0a9d0..cae786ca8600edf12d26042b02c66a236a5a52ff 100644 --- a/drivers/acpi/events/evmisc.c +++ b/drivers/acpi/events/evmisc.c @@ -196,11 +196,15 @@ acpi_ev_queue_notify_request(struct acpi_namespace_node * node, notify_info->notify.value = (u16) notify_value; notify_info->notify.handler_obj = handler_obj; - acpi_ex_relinquish_interpreter(); + acpi_ex_exit_interpreter(); acpi_ev_notify_dispatch(notify_info); - acpi_ex_reacquire_interpreter(); + status = acpi_ex_enter_interpreter(); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + } if (!handler_obj) { diff --git a/drivers/acpi/events/evregion.c b/drivers/acpi/events/evregion.c index e99f0c435a4724006c9d204c69349733b91d763f..96b0e84317482ed67d8ecdd493d678986cf1d6c9 100644 --- a/drivers/acpi/events/evregion.c +++ b/drivers/acpi/events/evregion.c @@ -291,6 +291,7 @@ acpi_ev_address_space_dispatch(union acpi_operand_object *region_obj, u32 bit_width, acpi_integer * value) { acpi_status status; + acpi_status status2; acpi_adr_space_handler handler; acpi_adr_space_setup region_setup; union acpi_operand_object *handler_desc; @@ -344,7 +345,7 @@ acpi_ev_address_space_dispatch(union acpi_operand_object *region_obj, * setup will potentially execute control methods * (e.g., _REG method for this region) */ - acpi_ex_relinquish_interpreter(); + acpi_ex_exit_interpreter(); status = region_setup(region_obj, ACPI_REGION_ACTIVATE, handler_desc->address_space.context, @@ -352,7 +353,10 @@ acpi_ev_address_space_dispatch(union acpi_operand_object *region_obj, /* Re-enter the interpreter */ - acpi_ex_reacquire_interpreter(); + status2 = acpi_ex_enter_interpreter(); + if (ACPI_FAILURE(status2)) { + return_ACPI_STATUS(status2); + } /* Check for failure of the Region Setup */ @@ -405,7 +409,7 @@ acpi_ev_address_space_dispatch(union acpi_operand_object *region_obj, * exit the interpreter because the handler *might* block -- we don't * know what it will do, so we can't hold the lock on the intepreter. */ - acpi_ex_relinquish_interpreter(); + acpi_ex_exit_interpreter(); } /* Call the handler */ @@ -426,7 +430,10 @@ acpi_ev_address_space_dispatch(union acpi_operand_object *region_obj, * We just returned from a non-default handler, we must re-enter the * interpreter */ - acpi_ex_reacquire_interpreter(); + status2 = acpi_ex_enter_interpreter(); + if (ACPI_FAILURE(status2)) { + return_ACPI_STATUS(status2); + } } return_ACPI_STATUS(status); diff --git a/drivers/acpi/events/evxface.c b/drivers/acpi/events/evxface.c index 685a103a35873ee920e3d8e1c7783bed2b3ce1fd..a3379bafa676dc7da65fd71aeed1db5091ad7de7 100644 --- a/drivers/acpi/events/evxface.c +++ b/drivers/acpi/events/evxface.c @@ -768,9 +768,11 @@ acpi_status acpi_acquire_global_lock(u16 timeout, u32 * handle) return (AE_BAD_PARAMETER); } - /* Must lock interpreter to prevent race conditions */ + status = acpi_ex_enter_interpreter(); + if (ACPI_FAILURE(status)) { + return (status); + } - acpi_ex_enter_interpreter(); status = acpi_ev_acquire_global_lock(timeout); acpi_ex_exit_interpreter(); diff --git a/drivers/acpi/executer/excreate.c b/drivers/acpi/executer/excreate.c index 7c38528a7e8336ef1ec3c57b2bc5c7741438281f..ae97812681a3ee7fa9ce448aadc0baaea51f7b39 100644 --- a/drivers/acpi/executer/excreate.c +++ b/drivers/acpi/executer/excreate.c @@ -583,7 +583,10 @@ acpi_ex_create_method(u8 * aml_start, * Get the sync_level. If method is serialized, a mutex will be * created for this method when it is parsed. */ - if (method_flags & AML_METHOD_SERIALIZED) { + if (acpi_gbl_all_methods_serialized) { + obj_desc->method.sync_level = 0; + obj_desc->method.method_flags |= AML_METHOD_SERIALIZED; + } else if (method_flags & AML_METHOD_SERIALIZED) { /* * ACPI 1.0: sync_level = 0 * ACPI 2.0: sync_level = sync_level in method declaration diff --git a/drivers/acpi/executer/exsystem.c b/drivers/acpi/executer/exsystem.c index 9460baff30328f4c5565e2c5d671eabfdf4f634c..b2edf620ba8968d1086dfe1938be8727a8d1580e 100644 --- a/drivers/acpi/executer/exsystem.c +++ b/drivers/acpi/executer/exsystem.c @@ -66,6 +66,7 @@ ACPI_MODULE_NAME("exsystem") 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); @@ -78,7 +79,7 @@ acpi_status acpi_ex_system_wait_semaphore(acpi_semaphore semaphore, u16 timeout) /* We must wait, so unlock the interpreter */ - acpi_ex_relinquish_interpreter(); + acpi_ex_exit_interpreter(); status = acpi_os_wait_semaphore(semaphore, 1, timeout); @@ -88,7 +89,13 @@ acpi_status acpi_ex_system_wait_semaphore(acpi_semaphore semaphore, u16 timeout) /* Reacquire the interpreter */ - acpi_ex_reacquire_interpreter(); + status2 = acpi_ex_enter_interpreter(); + if (ACPI_FAILURE(status2)) { + + /* Report fatal error, could not acquire interpreter */ + + return_ACPI_STATUS(status2); + } } return_ACPI_STATUS(status); @@ -112,6 +119,7 @@ acpi_status acpi_ex_system_wait_semaphore(acpi_semaphore semaphore, u16 timeout) acpi_status acpi_ex_system_wait_mutex(acpi_mutex mutex, u16 timeout) { acpi_status status; + acpi_status status2; ACPI_FUNCTION_TRACE(ex_system_wait_mutex); @@ -124,7 +132,7 @@ acpi_status acpi_ex_system_wait_mutex(acpi_mutex mutex, u16 timeout) /* We must wait, so unlock the interpreter */ - acpi_ex_relinquish_interpreter(); + acpi_ex_exit_interpreter(); status = acpi_os_acquire_mutex(mutex, timeout); @@ -134,7 +142,13 @@ acpi_status acpi_ex_system_wait_mutex(acpi_mutex mutex, u16 timeout) /* Reacquire the interpreter */ - acpi_ex_reacquire_interpreter(); + status2 = acpi_ex_enter_interpreter(); + if (ACPI_FAILURE(status2)) { + + /* Report fatal error, could not acquire interpreter */ + + return_ACPI_STATUS(status2); + } } return_ACPI_STATUS(status); @@ -195,18 +209,20 @@ 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_relinquish_interpreter(); + acpi_ex_exit_interpreter(); acpi_os_sleep(how_long); /* And now we must get the interpreter again */ - acpi_ex_reacquire_interpreter(); - return (AE_OK); + status = acpi_ex_enter_interpreter(); + return (status); } /******************************************************************************* diff --git a/drivers/acpi/executer/exutils.c b/drivers/acpi/executer/exutils.c index 6b0aeccbb69b3f59738d5a9dd22fe875a1a2d018..aea461f3a48cc02ab7269c8e7e7e9807657edefc 100644 --- a/drivers/acpi/executer/exutils.c +++ b/drivers/acpi/executer/exutils.c @@ -76,15 +76,14 @@ static u32 acpi_ex_digits_needed(acpi_integer value, u32 base); * * PARAMETERS: None * - * RETURN: None + * RETURN: Status * - * DESCRIPTION: Enter the interpreter execution region. Failure to enter - * the interpreter region is a fatal system error. Used in - * conjunction with exit_interpreter. + * DESCRIPTION: Enter the interpreter execution region. Failure to enter + * the interpreter region is a fatal system error * ******************************************************************************/ -void acpi_ex_enter_interpreter(void) +acpi_status acpi_ex_enter_interpreter(void) { acpi_status status; @@ -92,42 +91,10 @@ void acpi_ex_enter_interpreter(void) status = acpi_ut_acquire_mutex(ACPI_MTX_INTERPRETER); if (ACPI_FAILURE(status)) { - ACPI_ERROR((AE_INFO, - "Could not acquire AML Interpreter mutex")); + ACPI_ERROR((AE_INFO, "Could not acquire interpreter mutex")); } - return_VOID; -} - -/******************************************************************************* - * - * FUNCTION: acpi_ex_reacquire_interpreter - * - * PARAMETERS: None - * - * RETURN: None - * - * DESCRIPTION: Reacquire the interpreter execution region from within the - * interpreter code. Failure to enter the interpreter region is a - * fatal system error. Used in conjuction with - * relinquish_interpreter - * - ******************************************************************************/ - -void acpi_ex_reacquire_interpreter(void) -{ - ACPI_FUNCTION_TRACE(ex_reacquire_interpreter); - - /* - * If the global serialized flag is set, do not release the interpreter, - * since it was not actually released by acpi_ex_relinquish_interpreter. - * This forces the interpreter to be single threaded. - */ - if (!acpi_gbl_all_methods_serialized) { - acpi_ex_enter_interpreter(); - } - - return_VOID; + return_ACPI_STATUS(status); } /******************************************************************************* @@ -138,9 +105,17 @@ void acpi_ex_reacquire_interpreter(void) * * RETURN: None * - * DESCRIPTION: Exit the interpreter execution region. This is the top level - * routine used to exit the interpreter when all processing has - * been completed. + * DESCRIPTION: Exit the interpreter execution region + * + * Cases where the interpreter is unlocked: + * 1) Completion of the execution of a control method + * 2) Method blocked on a Sleep() AML opcode + * 3) Method blocked on an Acquire() AML opcode + * 4) Method blocked on a Wait() AML opcode + * 5) Method blocked to acquire the global lock + * 6) Method blocked to execute a serialized control method that is + * already executing + * 7) About to invoke a user-installed opregion handler * ******************************************************************************/ @@ -152,46 +127,7 @@ void acpi_ex_exit_interpreter(void) status = acpi_ut_release_mutex(ACPI_MTX_INTERPRETER); if (ACPI_FAILURE(status)) { - ACPI_ERROR((AE_INFO, - "Could not release AML Interpreter mutex")); - } - - return_VOID; -} - -/******************************************************************************* - * - * FUNCTION: acpi_ex_relinquish_interpreter - * - * PARAMETERS: None - * - * RETURN: None - * - * DESCRIPTION: Exit the interpreter execution region, from within the - * interpreter - before attempting an operation that will possibly - * block the running thread. - * - * Cases where the interpreter is unlocked internally - * 1) Method to be blocked on a Sleep() AML opcode - * 2) Method to be blocked on an Acquire() AML opcode - * 3) Method to be blocked on a Wait() AML opcode - * 4) Method to be blocked to acquire the global lock - * 5) Method to be blocked waiting to execute a serialized control method - * that is currently executing - * 6) About to invoke a user-installed opregion handler - * - ******************************************************************************/ - -void acpi_ex_relinquish_interpreter(void) -{ - ACPI_FUNCTION_TRACE(ex_relinquish_interpreter); - - /* - * If the global serialized flag is set, do not release the interpreter. - * This forces the interpreter to be single threaded. - */ - if (!acpi_gbl_all_methods_serialized) { - acpi_ex_exit_interpreter(); + ACPI_ERROR((AE_INFO, "Could not release interpreter mutex")); } return_VOID; @@ -205,8 +141,8 @@ void acpi_ex_relinquish_interpreter(void) * * RETURN: none * - * DESCRIPTION: Truncate an ACPI Integer to 32 bits if the execution mode is - * 32-bit, as determined by the revision of the DSDT. + * DESCRIPTION: Truncate a number to 32-bits if the currently executing method + * belongs to a 32-bit ACPI table. * ******************************************************************************/ diff --git a/drivers/acpi/namespace/nseval.c b/drivers/acpi/namespace/nseval.c index aa6370c67ec1628fd055186a630779109741ad42..26fd0dd6953dc7be4792610f8e662276b46d6124 100644 --- a/drivers/acpi/namespace/nseval.c +++ b/drivers/acpi/namespace/nseval.c @@ -154,7 +154,11 @@ acpi_status acpi_ns_evaluate(struct acpi_evaluate_info *info) * Execute the method via the interpreter. The interpreter is locked * here before calling into the AML parser */ - acpi_ex_enter_interpreter(); + status = acpi_ex_enter_interpreter(); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + status = acpi_ps_execute_method(info); acpi_ex_exit_interpreter(); } else { @@ -178,7 +182,10 @@ acpi_status acpi_ns_evaluate(struct acpi_evaluate_info *info) * resolution, we must lock it because we could access an opregion. * The opregion access code assumes that the interpreter is locked. */ - acpi_ex_enter_interpreter(); + status = acpi_ex_enter_interpreter(); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } /* Function has a strange interface */ diff --git a/drivers/acpi/namespace/nsinit.c b/drivers/acpi/namespace/nsinit.c index 33db2241044e5930430c5091f6580c9013721f15..c4ab615f77fea6a133f2f1cf9865217e9d02b0d5 100644 --- a/drivers/acpi/namespace/nsinit.c +++ b/drivers/acpi/namespace/nsinit.c @@ -214,7 +214,7 @@ acpi_ns_init_one_object(acpi_handle obj_handle, u32 level, void *context, void **return_value) { acpi_object_type type; - acpi_status status = AE_OK; + acpi_status status; struct acpi_init_walk_info *info = (struct acpi_init_walk_info *)context; struct acpi_namespace_node *node = @@ -268,7 +268,10 @@ acpi_ns_init_one_object(acpi_handle obj_handle, /* * Must lock the interpreter before executing AML code */ - acpi_ex_enter_interpreter(); + status = acpi_ex_enter_interpreter(); + if (ACPI_FAILURE(status)) { + return (status); + } /* * Each of these types can contain executable AML code within the diff --git a/drivers/acpi/namespace/nsxfeval.c b/drivers/acpi/namespace/nsxfeval.c index 7ac6ace5005905f1fa191bbc13dd679311c9e6d4..8904d0fae6a2ff90794389456b6f62420c5410d3 100644 --- a/drivers/acpi/namespace/nsxfeval.c +++ b/drivers/acpi/namespace/nsxfeval.c @@ -170,6 +170,7 @@ acpi_evaluate_object(acpi_handle handle, struct acpi_buffer *return_buffer) { acpi_status status; + acpi_status status2; struct acpi_evaluate_info *info; acpi_size buffer_space_needed; u32 i; @@ -328,12 +329,14 @@ acpi_evaluate_object(acpi_handle handle, * Delete the internal return object. NOTE: Interpreter must be * locked to avoid race condition. */ - acpi_ex_enter_interpreter(); + status2 = acpi_ex_enter_interpreter(); + if (ACPI_SUCCESS(status2)) { - /* Remove one reference on the return object (should delete it) */ + /* Remove one reference on the return object (should delete it) */ - acpi_ut_remove_reference(info->return_object); - acpi_ex_exit_interpreter(); + acpi_ut_remove_reference(info->return_object); + acpi_ex_exit_interpreter(); + } } cleanup: diff --git a/include/acpi/acinterp.h b/include/acpi/acinterp.h index 73967c8152d325012db1f690f9cd6744caec2f76..440983019993def8c5e3352b091892be11c6d288 100644 --- a/include/acpi/acinterp.h +++ b/include/acpi/acinterp.h @@ -446,14 +446,10 @@ acpi_ex_copy_integer_to_buffer_field(union acpi_operand_object *source_desc, /* * exutils - interpreter/scanner utilities */ -void acpi_ex_enter_interpreter(void); +acpi_status acpi_ex_enter_interpreter(void); void acpi_ex_exit_interpreter(void); -void acpi_ex_reacquire_interpreter(void); - -void acpi_ex_relinquish_interpreter(void); - void acpi_ex_truncate_for32bit_table(union acpi_operand_object *obj_desc); u8 acpi_ex_acquire_global_lock(u32 rule);