[PATCH 85/140] ACPICA: On AML mutex force-release, set depth to zero (was 1).

Len Brown
2007-02-07T18:55:00Z

From: Bob Moore <robert.moore@intel.com>

Signed-off-by: Alexey Starikovskiy <alexey.y.starikovskiy@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
---
drivers/acpi/executer/exmutex.c | 8 +++++++-
1 files changed, 7 insertions(+), 1 deletions(-)

diff --git a/drivers/acpi/executer/exmutex.c b/drivers/acpi/executer/exmutex.c
index f1dd1b0..b0be2f4 100644
--- a/drivers/acpi/executer/exmutex.c
+++ b/drivers/acpi/executer/exmutex.c
@@ -329,6 +329,12 @@ acpi_ex_release_mutex(union acpi_operand_object *obj_desc,
*
* DESCRIPTION: Release all mutexes held by this thread
*
+ * NOTE: This function is called as the thread is exiting the interpreter.
+ * Mutexes are not released when an individual control method is exited, but
+ * only when the parent thread actually exits the interpreter. This allows one
+ * method to acquire a mutex, and a different method to release it, as long as
+ * this is performed underneath a single parent control method.
+ *
******************************************************************************/

void acpi_ex_release_all_mutexes(struct acpi_thread_state *thread)
@@ -346,7 +352,7 @@ void acpi_ex_release_all_mutexes(struct acpi_thread_state *thread)

obj_desc->mutex.prev = NULL;
obj_desc->mutex.next = NULL;
- obj_desc->mutex.acquisition_depth = 1;
+ obj_desc->mutex.acquisition_depth = 0;

/* Release the mutex, special case for Global Lock */

--
1.5.0.rc3.39.gec804