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path: root/drivers/acpi/acpica/exmutex.c
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Diffstat (limited to 'drivers/acpi/acpica/exmutex.c')
-rw-r--r--drivers/acpi/acpica/exmutex.c46
1 files changed, 23 insertions, 23 deletions
diff --git a/drivers/acpi/acpica/exmutex.c b/drivers/acpi/acpica/exmutex.c
index 7116bc86494d..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);
@@ -366,9 +367,11 @@ 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)));
@@ -387,16 +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);
}
@@ -407,10 +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));
@@ -423,7 +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)) {
@@ -434,8 +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);
}
@@ -443,7 +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
*