void acpi_ex_release_all_mutexes(struct acpi_thread_state *thread)
{
union acpi_operand_object *next = thread->acquired_mutex_list;
union acpi_operand_object *this;
acpi_status status;
ACPI_FUNCTION_ENTRY();
/* Traverse the list of owned mutexes, releasing each one */
while (next) {
this = next;
next = this->mutex.next;
this->mutex.acquisition_depth = 1;
this->mutex.prev = NULL;
this->mutex.next = NULL;
/* Release the mutex */
status = acpi_ex_system_release_mutex(this);
if (ACPI_FAILURE(status)) {
continue;
}
/* Mark mutex unowned */
this->mutex.owner_thread = NULL;
/* Update Thread sync_level (Last mutex is the important one) */
thread->current_sync_level = this->mutex.original_sync_level;
}
}
acpi_status
acpi_ex_release_all_mutexes (
acpi_operand_object *list_head)
{
acpi_operand_object *next = list_head->mutex.next;
acpi_operand_object *this;
FUNCTION_ENTRY ();
/*
* Traverse the list of owned mutexes, releasing each one.
*/
while (next) {
this = next;
next = this->mutex.next;
/* Mark mutex un-owned */
this->mutex.owner = NULL;
this->mutex.prev = NULL;
this->mutex.next = NULL;
this->mutex.acquisition_depth = 0;
/* Release the mutex */
acpi_ex_system_release_mutex (this);
}
return (AE_OK);
}
acpi_status
acpi_ex_release_mutex(union acpi_operand_object *obj_desc,
struct acpi_walk_state *walk_state)
{
acpi_status status;
ACPI_FUNCTION_TRACE(ex_release_mutex);
if (!obj_desc) {
return_ACPI_STATUS(AE_BAD_PARAMETER);
}
/* The mutex must have been previously acquired in order to release it */
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)));
return_ACPI_STATUS(AE_AML_MUTEX_NOT_ACQUIRED);
}
/* Sanity check -- we must have a valid thread ID */
if (!walk_state->thread) {
ACPI_ERROR((AE_INFO,
"Cannot release Mutex [%4.4s], null thread info",
acpi_ut_get_node_name(obj_desc->mutex.node)));
return_ACPI_STATUS(AE_AML_INTERNAL);
}
/*
* 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->mutex.os_mutex != ACPI_GLOBAL_LOCK)) {
ACPI_ERROR((AE_INFO,
"Thread %X cannot release Mutex [%4.4s] acquired by thread %X",
(u32)(long) walk_state->thread->thread_id,
acpi_ut_get_node_name(obj_desc->mutex.node),
(u32)(long) obj_desc->mutex.owner_thread->thread_id));
return_ACPI_STATUS(AE_AML_NOT_OWNER);
}
/*
* The sync level of the mutex must be less than or
* equal to the current sync level
*/
if (obj_desc->mutex.sync_level > walk_state->thread->current_sync_level) {
ACPI_ERROR((AE_INFO,
"Cannot release Mutex [%4.4s], incorrect SyncLevel",
acpi_ut_get_node_name(obj_desc->mutex.node)));
return_ACPI_STATUS(AE_AML_MUTEX_ORDER);
}
/* Match multiple Acquires with multiple Releases */
obj_desc->mutex.acquisition_depth--;
if (obj_desc->mutex.acquisition_depth != 0) {
/* Just decrement the depth and return */
return_ACPI_STATUS(AE_OK);
}
/* Unlink the mutex from the owner's list */
acpi_ex_unlink_mutex(obj_desc);
/* Release the mutex */
status = acpi_ex_system_release_mutex(obj_desc);
/* Update the mutex and walk state, restore sync_level before acquire */
obj_desc->mutex.owner_thread = NULL;
walk_state->thread->current_sync_level =
obj_desc->mutex.original_sync_level;
return_ACPI_STATUS(status);
}
acpi_status
acpi_ex_release_mutex (
acpi_operand_object *obj_desc,
acpi_walk_state *walk_state)
{
acpi_status status;
FUNCTION_TRACE ("Ex_release_mutex");
if (!obj_desc) {
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
/* The mutex must have been previously acquired in order to release it */
if (!obj_desc->mutex.owner) {
return_ACPI_STATUS (AE_AML_MUTEX_NOT_ACQUIRED);
}
/* The Mutex is owned, but this thread must be the owner */
if (obj_desc->mutex.owner != walk_state) {
return_ACPI_STATUS (AE_AML_NOT_OWNER);
}
/*
* The sync level of the mutex must be less than or
* equal to the current sync level
*/
if (obj_desc->mutex.sync_level > walk_state->current_sync_level) {
return_ACPI_STATUS (AE_AML_MUTEX_ORDER);
}
/*
* Match multiple Acquires with multiple Releases
*/
obj_desc->mutex.acquisition_depth--;
if (obj_desc->mutex.acquisition_depth != 0) {
/* Just decrement the depth and return */
return_ACPI_STATUS (AE_OK);
}
/* Release the mutex */
status = acpi_ex_system_release_mutex (obj_desc);
/* Update the mutex and walk state */
obj_desc->mutex.owner = NULL;
walk_state->current_sync_level = obj_desc->mutex.sync_level;
/* Unlink the mutex from the owner's list */
acpi_ex_unlink_mutex (obj_desc);
return_ACPI_STATUS (status);
}
