1 files changed, 68 insertions, 14 deletions

diff --git a/drivers/acpi/executer/exsystem.c b/drivers/acpi/executer/exsystem.c
index 52beee3674a0..6b5d1e6ce94b 100644
--- a/drivers/acpi/executer/exsystem.c
+++ b/drivers/acpi/executer/exsystem.c
@@ -63,14 +63,14 @@ ACPI_MODULE_NAME("exsystem")
  *              interpreter is released.
  *
  ******************************************************************************/
-acpi_status acpi_ex_system_wait_semaphore(acpi_handle semaphore, u16 timeout)
+acpi_status acpi_ex_system_wait_semaphore(acpi_semaphore semaphore, u16 timeout)
 {
         acpi_status status;
         acpi_status status2;
 
         ACPI_FUNCTION_TRACE(ex_system_wait_semaphore);
 
-        status = acpi_os_wait_semaphore(semaphore, 1, 0);
+        status = acpi_os_wait_semaphore(semaphore, 1, ACPI_DO_NOT_WAIT);
         if (ACPI_SUCCESS(status)) {
                 return_ACPI_STATUS(status);
         }
@@ -103,6 +103,59 @@ acpi_status acpi_ex_system_wait_semaphore(acpi_handle semaphore, u16 timeout)
 
 /*******************************************************************************
  *
+ * FUNCTION:    acpi_ex_system_wait_mutex
+ *
+ * PARAMETERS:  Mutex           - Mutex to wait on
+ *              Timeout         - Max time to wait
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Implements a semaphore wait with a check to see if the
+ *              semaphore is available immediately.  If it is not, the
+ *              interpreter is released.
+ *
+ ******************************************************************************/
+
+acpi_status acpi_ex_system_wait_mutex(acpi_mutex mutex, u16 timeout)
+{
+        acpi_status status;
+        acpi_status status2;
+
+        ACPI_FUNCTION_TRACE(ex_system_wait_mutex);
+
+        status = acpi_os_acquire_mutex(mutex, ACPI_DO_NOT_WAIT);
+        if (ACPI_SUCCESS(status)) {
+                return_ACPI_STATUS(status);
+        }
+
+        if (status == AE_TIME) {
+
+                /* We must wait, so unlock the interpreter */
+
+                acpi_ex_exit_interpreter();
+
+                status = acpi_os_acquire_mutex(mutex, timeout);
+
+                ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
+                                  "*** Thread awake after blocking, %s\n",
+                                  acpi_format_exception(status)));
+
+                /* Reacquire the interpreter */
+
+                status2 = acpi_ex_enter_interpreter();
+                if (ACPI_FAILURE(status2)) {
+
+                        /* Report fatal error, could not acquire interpreter */
+
+                        return_ACPI_STATUS(status2);
+                }
+        }
+
+        return_ACPI_STATUS(status);
+}
+
+/*******************************************************************************
+ *
  * FUNCTION:    acpi_ex_system_do_stall
  *
  * PARAMETERS:  how_long        - The amount of time to stall,
@@ -176,7 +229,7 @@ acpi_status acpi_ex_system_do_suspend(acpi_integer how_long)
  *
  * FUNCTION:    acpi_ex_system_acquire_mutex
  *
- * PARAMETERS:  time_desc       - The 'time to delay' object descriptor
+ * PARAMETERS:  time_desc       - Maximum time to wait for the mutex
  *              obj_desc        - The object descriptor for this op
  *
  * RETURN:      Status
@@ -201,14 +254,14 @@ acpi_ex_system_acquire_mutex(union acpi_operand_object * time_desc,
 
         /* Support for the _GL_ Mutex object -- go get the global lock */
 
-        if (obj_desc->mutex.semaphore == acpi_gbl_global_lock_semaphore) {
+        if (obj_desc->mutex.os_mutex == ACPI_GLOBAL_LOCK) {
                 status =
                     acpi_ev_acquire_global_lock((u16) time_desc->integer.value);
                 return_ACPI_STATUS(status);
         }
 
-        status = acpi_ex_system_wait_semaphore(obj_desc->mutex.semaphore,
-                                               (u16) time_desc->integer.value);
+        status = acpi_ex_system_wait_mutex(obj_desc->mutex.os_mutex,
+                                           (u16) time_desc->integer.value);
         return_ACPI_STATUS(status);
 }
 
@@ -239,13 +292,13 @@ acpi_status acpi_ex_system_release_mutex(union acpi_operand_object *obj_desc)
 
         /* Support for the _GL_ Mutex object -- release the global lock */
 
-        if (obj_desc->mutex.semaphore == acpi_gbl_global_lock_semaphore) {
+        if (obj_desc->mutex.os_mutex == ACPI_GLOBAL_LOCK) {
                 status = acpi_ev_release_global_lock();
                 return_ACPI_STATUS(status);
         }
 
-        status = acpi_os_signal_semaphore(obj_desc->mutex.semaphore, 1);
-        return_ACPI_STATUS(status);
+        acpi_os_release_mutex(obj_desc->mutex.os_mutex);
+        return_ACPI_STATUS(AE_OK);
 }
 
 /*******************************************************************************
@@ -268,7 +321,8 @@ acpi_status acpi_ex_system_signal_event(union acpi_operand_object *obj_desc)
         ACPI_FUNCTION_TRACE(ex_system_signal_event);
 
         if (obj_desc) {
-                status = acpi_os_signal_semaphore(obj_desc->event.semaphore, 1);
+                status =
+                    acpi_os_signal_semaphore(obj_desc->event.os_semaphore, 1);
         }
 
         return_ACPI_STATUS(status);
@@ -299,7 +353,7 @@ acpi_ex_system_wait_event(union acpi_operand_object *time_desc,
 
         if (obj_desc) {
                 status =
-                    acpi_ex_system_wait_semaphore(obj_desc->event.semaphore,
+                    acpi_ex_system_wait_semaphore(obj_desc->event.os_semaphore,
                                                   (u16) time_desc->integer.
                                                   value);
         }
@@ -322,7 +376,7 @@ acpi_ex_system_wait_event(union acpi_operand_object *time_desc,
 acpi_status acpi_ex_system_reset_event(union acpi_operand_object *obj_desc)
 {
         acpi_status status = AE_OK;
-        void *temp_semaphore;
+        acpi_semaphore temp_semaphore;
 
         ACPI_FUNCTION_ENTRY();
 
@@ -333,8 +387,8 @@ acpi_status acpi_ex_system_reset_event(union acpi_operand_object *obj_desc)
         status =
             acpi_os_create_semaphore(ACPI_NO_UNIT_LIMIT, 0, &temp_semaphore);
         if (ACPI_SUCCESS(status)) {
-                (void)acpi_os_delete_semaphore(obj_desc->event.semaphore);
-                obj_desc->event.semaphore = temp_semaphore;
+                (void)acpi_os_delete_semaphore(obj_desc->event.os_semaphore);
+                obj_desc->event.os_semaphore = temp_semaphore;
         }
 
         return (status);