diff options
Diffstat (limited to 'drivers/acpi/executer/exmutex.c')
| -rw-r--r-- | drivers/acpi/executer/exmutex.c | 36 |
1 files changed, 20 insertions, 16 deletions
diff --git a/drivers/acpi/executer/exmutex.c b/drivers/acpi/executer/exmutex.c index 4eb883bda6a..5101bad5baf 100644 --- a/drivers/acpi/executer/exmutex.c +++ b/drivers/acpi/executer/exmutex.c @@ -66,9 +66,10 @@ acpi_ex_link_mutex(union acpi_operand_object *obj_desc, * ******************************************************************************/ -void acpi_ex_unlink_mutex(union acpi_operand_object *obj_desc, - struct acpi_thread_state *thread) +void acpi_ex_unlink_mutex(union acpi_operand_object *obj_desc) { + struct acpi_thread_state *thread = obj_desc->mutex.owner_thread; + if (!thread) { return; } @@ -173,13 +174,16 @@ acpi_ex_acquire_mutex(union acpi_operand_object *time_desc, /* Support for multiple acquires by the owning thread */ - if (obj_desc->mutex.owner_thread_id == acpi_os_get_thread_id()) { - /* - * The mutex is already owned by this thread, just increment the - * acquisition depth - */ - obj_desc->mutex.acquisition_depth++; - return_ACPI_STATUS(AE_OK); + if (obj_desc->mutex.owner_thread) { + if (obj_desc->mutex.owner_thread->thread_id == + walk_state->thread->thread_id) { + /* + * The mutex is already owned by this thread, just increment the + * acquisition depth + */ + obj_desc->mutex.acquisition_depth++; + return_ACPI_STATUS(AE_OK); + } } /* Acquire the mutex, wait if necessary. Special case for Global Lock */ @@ -202,7 +206,7 @@ acpi_ex_acquire_mutex(union acpi_operand_object *time_desc, /* Have the mutex: update mutex and walk info and save the sync_level */ - obj_desc->mutex.owner_thread_id = acpi_os_get_thread_id(); + obj_desc->mutex.owner_thread = walk_state->thread; obj_desc->mutex.acquisition_depth = 1; obj_desc->mutex.original_sync_level = walk_state->thread->current_sync_level; @@ -242,7 +246,7 @@ acpi_ex_release_mutex(union acpi_operand_object *obj_desc, /* The mutex must have been previously acquired in order to release it */ - if (!obj_desc->mutex.owner_thread_id) { + if (!obj_desc->mutex.owner_thread) { ACPI_ERROR((AE_INFO, "Cannot release Mutex [%4.4s], not acquired", acpi_ut_get_node_name(obj_desc->mutex.node))); @@ -262,14 +266,14 @@ 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_id != + if ((obj_desc->mutex.owner_thread->thread_id != walk_state->thread->thread_id) && (obj_desc->mutex.os_mutex != acpi_gbl_global_lock_mutex)) { ACPI_ERROR((AE_INFO, "Thread %lX cannot release Mutex [%4.4s] acquired by thread %lX", (unsigned long)walk_state->thread->thread_id, acpi_ut_get_node_name(obj_desc->mutex.node), - (unsigned long)obj_desc->mutex.owner_thread_id)); + (unsigned long)obj_desc->mutex.owner_thread->thread_id)); return_ACPI_STATUS(AE_AML_NOT_OWNER); } @@ -296,7 +300,7 @@ acpi_ex_release_mutex(union acpi_operand_object *obj_desc, /* Unlink the mutex from the owner's list */ - acpi_ex_unlink_mutex(obj_desc, walk_state->thread); + acpi_ex_unlink_mutex(obj_desc); /* Release the mutex, special case for Global Lock */ @@ -308,7 +312,7 @@ acpi_ex_release_mutex(union acpi_operand_object *obj_desc, /* Update the mutex and restore sync_level */ - obj_desc->mutex.owner_thread_id = ACPI_MUTEX_NOT_ACQUIRED; + obj_desc->mutex.owner_thread = NULL; walk_state->thread->current_sync_level = obj_desc->mutex.original_sync_level; @@ -363,7 +367,7 @@ void acpi_ex_release_all_mutexes(struct acpi_thread_state *thread) /* Mark mutex unowned */ - obj_desc->mutex.owner_thread_id = ACPI_MUTEX_NOT_ACQUIRED; + obj_desc->mutex.owner_thread = NULL; /* Update Thread sync_level (Last mutex is the important one) */ |