diff options
Diffstat (limited to 'drivers/acpi/acpica/exmutex.c')
| -rw-r--r-- | drivers/acpi/acpica/exmutex.c | 49 |
1 files changed, 24 insertions, 25 deletions
diff --git a/drivers/acpi/acpica/exmutex.c b/drivers/acpi/acpica/exmutex.c index cc8a10268f68..f73be97043c0 100644 --- a/drivers/acpi/acpica/exmutex.c +++ b/drivers/acpi/acpica/exmutex.c @@ -85,10 +85,10 @@ void acpi_ex_unlink_mutex(union acpi_operand_object *obj_desc) (obj_desc->mutex.prev)->mutex.next = obj_desc->mutex.next; /* - * Migrate the previous sync level associated with this mutex to the - * previous mutex on the list so that it may be preserved. This handles - * the case where several mutexes have been acquired at the same level, - * but are not released in opposite order. + * Migrate the previous sync level associated with this mutex to + * the previous mutex on the list so that it may be preserved. + * This handles the case where several mutexes have been acquired + * at the same level, but are not released in opposite order. */ (obj_desc->mutex.prev)->mutex.original_sync_level = obj_desc->mutex.original_sync_level; @@ -101,8 +101,8 @@ void acpi_ex_unlink_mutex(union acpi_operand_object *obj_desc) * * FUNCTION: acpi_ex_link_mutex * - * PARAMETERS: obj_desc - The mutex to be linked - * Thread - Current executing thread object + * PARAMETERS: obj_desc - The mutex to be linked + * Thread - Current executing thread object * * RETURN: None * @@ -138,9 +138,9 @@ acpi_ex_link_mutex(union acpi_operand_object *obj_desc, * * FUNCTION: acpi_ex_acquire_mutex_object * - * PARAMETERS: time_desc - Timeout in milliseconds + * PARAMETERS: Timeout - Timeout in milliseconds * obj_desc - Mutex object - * Thread - Current thread state + * thread_id - Current thread state * * RETURN: Status * @@ -234,7 +234,7 @@ acpi_ex_acquire_mutex(union acpi_operand_object *time_desc, return_ACPI_STATUS(AE_BAD_PARAMETER); } - /* Must have a valid thread ID */ + /* Must have a valid thread state struct */ if (!walk_state->thread) { ACPI_ERROR((AE_INFO, @@ -249,7 +249,7 @@ acpi_ex_acquire_mutex(union acpi_operand_object *time_desc, */ if (walk_state->thread->current_sync_level > obj_desc->mutex.sync_level) { ACPI_ERROR((AE_INFO, - "Cannot acquire Mutex [%4.4s], current SyncLevel is too large (%d)", + "Cannot acquire Mutex [%4.4s], current SyncLevel is too large (%u)", acpi_ut_get_node_name(obj_desc->mutex.node), walk_state->thread->current_sync_level)); return_ACPI_STATUS(AE_AML_MUTEX_ORDER); @@ -359,6 +359,7 @@ acpi_ex_release_mutex(union acpi_operand_object *obj_desc, { acpi_status status = AE_OK; u8 previous_sync_level; + struct acpi_thread_state *owner_thread; ACPI_FUNCTION_TRACE(ex_release_mutex); @@ -366,17 +367,18 @@ acpi_ex_release_mutex(union acpi_operand_object *obj_desc, return_ACPI_STATUS(AE_BAD_PARAMETER); } + owner_thread = obj_desc->mutex.owner_thread; + /* The mutex must have been previously acquired in order to release it */ - if (!obj_desc->mutex.owner_thread) { + if (!owner_thread) { ACPI_ERROR((AE_INFO, "Cannot release Mutex [%4.4s], not acquired", acpi_ut_get_node_name(obj_desc->mutex.node))); return_ACPI_STATUS(AE_AML_MUTEX_NOT_ACQUIRED); } - /* Must have a valid thread ID */ - + /* Must have a valid thread. */ if (!walk_state->thread) { ACPI_ERROR((AE_INFO, "Cannot release Mutex [%4.4s], null thread info", @@ -388,16 +390,13 @@ acpi_ex_release_mutex(union acpi_operand_object *obj_desc, * The Mutex is owned, but this thread must be the owner. * Special case for Global Lock, any thread can release */ - if ((obj_desc->mutex.owner_thread->thread_id != - walk_state->thread->thread_id) - && (obj_desc != acpi_gbl_global_lock_mutex)) { + if ((owner_thread->thread_id != walk_state->thread->thread_id) && + (obj_desc != acpi_gbl_global_lock_mutex)) { ACPI_ERROR((AE_INFO, "Thread %p cannot release Mutex [%4.4s] acquired by thread %p", ACPI_CAST_PTR(void, walk_state->thread->thread_id), acpi_ut_get_node_name(obj_desc->mutex.node), - ACPI_CAST_PTR(void, - obj_desc->mutex.owner_thread-> - thread_id))); + ACPI_CAST_PTR(void, owner_thread->thread_id))); return_ACPI_STATUS(AE_AML_NOT_OWNER); } @@ -408,10 +407,9 @@ acpi_ex_release_mutex(union acpi_operand_object *obj_desc, * different level can only mean that the mutex ordering rule is being * violated. This behavior is clarified in ACPI 4.0 specification. */ - if (obj_desc->mutex.sync_level != - walk_state->thread->current_sync_level) { + if (obj_desc->mutex.sync_level != owner_thread->current_sync_level) { ACPI_ERROR((AE_INFO, - "Cannot release Mutex [%4.4s], SyncLevel mismatch: mutex %d current %d", + "Cannot release Mutex [%4.4s], SyncLevel mismatch: mutex %u current %u", acpi_ut_get_node_name(obj_desc->mutex.node), obj_desc->mutex.sync_level, walk_state->thread->current_sync_level)); @@ -424,7 +422,7 @@ acpi_ex_release_mutex(union acpi_operand_object *obj_desc, * acquired, but are not released in reverse order. */ previous_sync_level = - walk_state->thread->acquired_mutex_list->mutex.original_sync_level; + owner_thread->acquired_mutex_list->mutex.original_sync_level; status = acpi_ex_release_mutex_object(obj_desc); if (ACPI_FAILURE(status)) { @@ -435,8 +433,9 @@ acpi_ex_release_mutex(union acpi_operand_object *obj_desc, /* Restore the previous sync_level */ - walk_state->thread->current_sync_level = previous_sync_level; + owner_thread->current_sync_level = previous_sync_level; } + return_ACPI_STATUS(status); } @@ -444,7 +443,7 @@ acpi_ex_release_mutex(union acpi_operand_object *obj_desc, * * FUNCTION: acpi_ex_release_all_mutexes * - * PARAMETERS: Thread - Current executing thread object + * PARAMETERS: Thread - Current executing thread object * * RETURN: Status * |