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ACPICA: exmutex: General cleanup, restructured some code

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ACPICA commit c2a7d000b6be34313b1c50c8a718df16113f0f32

Should be no functional change.

Link: https://github.com/acpica/acpica/commit/c2a7d000
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Bob Moore 2015-12-29 13:54:28 +08:00 committed by Rafael J. Wysocki
parent c118abc554
commit cd162b35a2
1 changed files with 59 additions and 21 deletions
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80
drivers/acpi/acpica/exmutex.c
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@ -185,8 +185,9 @@ acpi_ex_acquire_mutex_object(u16 timeout,
if (obj_desc == acpi_gbl_global_lock_mutex) {
status = acpi_ev_acquire_global_lock(timeout);
} else {
status = acpi_ex_system_wait_mutex(obj_desc->mutex.os_mutex,
timeout);
status =
acpi_ex_system_wait_mutex(obj_desc->mutex.os_mutex,
timeout);
}
if (ACPI_FAILURE(status)) {
@ -243,20 +244,30 @@ acpi_ex_acquire_mutex(union acpi_operand_object *time_desc,
}
/*
* Current sync level must be less than or equal to the sync level of the
* mutex. This mechanism provides some deadlock prevention
* Current sync level must be less than or equal to the sync level
* of the mutex. This mechanism provides some deadlock prevention.
*/
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 (%u)",
"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);
}
ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
"Acquiring: Mutex SyncLevel %u, Thread SyncLevel %u, "
"Depth %u TID %p\n",
obj_desc->mutex.sync_level,
walk_state->thread->current_sync_level,
obj_desc->mutex.acquisition_depth,
walk_state->thread));
status = acpi_ex_acquire_mutex_object((u16)time_desc->integer.value,
obj_desc,
walk_state->thread->thread_id);
if (ACPI_SUCCESS(status) && obj_desc->mutex.acquisition_depth == 1) {
/* Save Thread object, original/current sync levels */
@ -272,6 +283,12 @@ acpi_ex_acquire_mutex(union acpi_operand_object *time_desc,
acpi_ex_link_mutex(obj_desc, walk_state->thread);
}
ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
"Acquired: Mutex SyncLevel %u, Thread SyncLevel %u, Depth %u\n",
obj_desc->mutex.sync_level,
walk_state->thread->current_sync_level,
obj_desc->mutex.acquisition_depth));
return_ACPI_STATUS(status);
}
@ -356,9 +373,9 @@ acpi_status
acpi_ex_release_mutex(union acpi_operand_object *obj_desc,
struct acpi_walk_state *walk_state)
{
acpi_status status = AE_OK;
u8 previous_sync_level;
struct acpi_thread_state *owner_thread;
acpi_status status = AE_OK;
ACPI_FUNCTION_TRACE(ex_release_mutex);
@ -409,7 +426,8 @@ acpi_ex_release_mutex(union acpi_operand_object *obj_desc,
*/
if (obj_desc->mutex.sync_level != owner_thread->current_sync_level) {
ACPI_ERROR((AE_INFO,
"Cannot release Mutex [%4.4s], SyncLevel mismatch: mutex %u current %u",
"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));
@ -424,6 +442,15 @@ acpi_ex_release_mutex(union acpi_operand_object *obj_desc,
previous_sync_level =
owner_thread->acquired_mutex_list->mutex.original_sync_level;
ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
"Releasing: Object SyncLevel %u, Thread SyncLevel %u, "
"Prev SyncLevel %u, Depth %u TID %p\n",
obj_desc->mutex.sync_level,
walk_state->thread->current_sync_level,
previous_sync_level,
obj_desc->mutex.acquisition_depth,
walk_state->thread));
status = acpi_ex_release_mutex_object(obj_desc);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
@ -436,6 +463,14 @@ acpi_ex_release_mutex(union acpi_operand_object *obj_desc,
owner_thread->current_sync_level = previous_sync_level;
}
ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
"Released: Object SyncLevel %u, Thread SyncLevel, %u, "
"Prev SyncLevel %u, Depth %u\n",
obj_desc->mutex.sync_level,
walk_state->thread->current_sync_level,
previous_sync_level,
obj_desc->mutex.acquisition_depth));
return_ACPI_STATUS(status);
}
@ -462,21 +497,17 @@ void acpi_ex_release_all_mutexes(struct acpi_thread_state *thread)
union acpi_operand_object *next = thread->acquired_mutex_list;
union acpi_operand_object *obj_desc;
ACPI_FUNCTION_NAME(ex_release_all_mutexes);
ACPI_FUNCTION_TRACE(ex_release_all_mutexes);
/* Traverse the list of owned mutexes, releasing each one */
while (next) {
obj_desc = next;
next = obj_desc->mutex.next;
obj_desc->mutex.prev = NULL;
obj_desc->mutex.next = NULL;
obj_desc->mutex.acquisition_depth = 0;
ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
"Force-releasing held mutex: %p\n",
obj_desc));
"Mutex [%4.4s] force-release, SyncLevel %u Depth %u\n",
obj_desc->mutex.node->name.ascii,
obj_desc->mutex.sync_level,
obj_desc->mutex.acquisition_depth));
/* Release the mutex, special case for Global Lock */
@ -489,14 +520,21 @@ void acpi_ex_release_all_mutexes(struct acpi_thread_state *thread)
acpi_os_release_mutex(obj_desc->mutex.os_mutex);
}
/* Mark mutex unowned */
obj_desc->mutex.owner_thread = NULL;
obj_desc->mutex.thread_id = 0;
/* Update Thread sync_level (Last mutex is the important one) */
thread->current_sync_level =
obj_desc->mutex.original_sync_level;
/* Mark mutex unowned */
next = obj_desc->mutex.next;
obj_desc->mutex.prev = NULL;
obj_desc->mutex.next = NULL;
obj_desc->mutex.acquisition_depth = 0;
obj_desc->mutex.owner_thread = NULL;
obj_desc->mutex.thread_id = 0;
}
return_VOID;
}