ACPICA: Misc fixes for recent global lock code update

Fixes as a result of running full validation test suite.

Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de>
Signed-off-by: Len Brown <len.brown@intel.com>

4 files changed, 32 insertions, 12 deletions

diff --git a/drivers/acpi/events/evxface.c b/drivers/acpi/events/evxface.c
index dbf34a5fc1e0..e210aa2d76da 100644
--- a/drivers/acpi/events/evxface.c
+++ b/drivers/acpi/events/evxface.c
@@ -816,7 +816,7 @@ acpi_status acpi_release_global_lock(u32 handle)
 {
         acpi_status status;
 
-        if (handle != acpi_gbl_global_lock_handle) {
+        if (!handle || (handle != acpi_gbl_global_lock_handle)) {
                 return (AE_NOT_ACQUIRED);
         }
 
diff --git a/drivers/acpi/executer/exfield.c b/drivers/acpi/executer/exfield.c
index e66b367c4fb6..da772cb91d7f 100644
--- a/drivers/acpi/executer/exfield.c
+++ b/drivers/acpi/executer/exfield.c
@@ -122,7 +122,7 @@ acpi_ex_read_data_from_field(struct acpi_walk_state *walk_state,
                                                              buffer.pointer),
                                                ACPI_READ | (obj_desc->field.
                                                             attribute << 16));
-                acpi_ex_release_global_lock();
+                acpi_ex_release_global_lock(obj_desc->common_field.field_flags);
                 goto exit;
         }
 
@@ -177,7 +177,7 @@ acpi_ex_read_data_from_field(struct acpi_walk_state *walk_state,
         /* Read from the field */
 
         status = acpi_ex_extract_from_field(obj_desc, buffer, (u32) length);
-        acpi_ex_release_global_lock();
+        acpi_ex_release_global_lock(obj_desc->common_field.field_flags);
 
       exit:
         if (ACPI_FAILURE(status)) {
@@ -284,7 +284,7 @@ acpi_ex_write_data_to_field(union acpi_operand_object *source_desc,
                                                (acpi_integer *) buffer,
                                                ACPI_WRITE | (obj_desc->field.
                                                              attribute << 16));
-                acpi_ex_release_global_lock();
+                acpi_ex_release_global_lock(obj_desc->common_field.field_flags);
 
                 *result_desc = buffer_desc;
                 return_ACPI_STATUS(status);
@@ -364,7 +364,7 @@ acpi_ex_write_data_to_field(union acpi_operand_object *source_desc,
         /* Write to the field */
 
         status = acpi_ex_insert_into_field(obj_desc, buffer, length);
-        acpi_ex_release_global_lock();
+        acpi_ex_release_global_lock(obj_desc->common_field.field_flags);
 
         /* Free temporary buffer if we used one */
 
diff --git a/drivers/acpi/executer/exmutex.c b/drivers/acpi/executer/exmutex.c
index 32f24a8fba57..b8d035c00b61 100644
--- a/drivers/acpi/executer/exmutex.c
+++ b/drivers/acpi/executer/exmutex.c
@@ -156,6 +156,10 @@ acpi_ex_acquire_mutex_object(u16 timeout,
 
         ACPI_FUNCTION_TRACE_PTR(ex_acquire_mutex_object, obj_desc);
 
+        if (!obj_desc) {
+                return_ACPI_STATUS(AE_BAD_PARAMETER);
+        }
+
         /* Support for multiple acquires by the owning thread */
 
         if (obj_desc->mutex.thread_id == thread_id) {
@@ -290,6 +294,10 @@ acpi_status acpi_ex_release_mutex_object(union acpi_operand_object *obj_desc)
 
         ACPI_FUNCTION_TRACE(ex_release_mutex_object);
 
+        if (obj_desc->mutex.acquisition_depth == 0) {
+                return (AE_NOT_ACQUIRED);
+        }
+
         /* Match multiple Acquires with multiple Releases */
 
         obj_desc->mutex.acquisition_depth--;
@@ -387,17 +395,22 @@ acpi_ex_release_mutex(union acpi_operand_object *obj_desc,
          */
         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)));
+                            "Cannot release Mutex [%4.4s], SyncLevel mismatch: mutex %d current %d",
+                            acpi_ut_get_node_name(obj_desc->mutex.node),
+                            obj_desc->mutex.sync_level,
+                            walk_state->thread->current_sync_level));
                 return_ACPI_STATUS(AE_AML_MUTEX_ORDER);
         }
 
         status = acpi_ex_release_mutex_object(obj_desc);
 
-        /* Restore the original sync_level */
+        if (obj_desc->mutex.acquisition_depth == 0) {
+
+                /* Restore the original sync_level */
 
-        walk_state->thread->current_sync_level =
-            obj_desc->mutex.original_sync_level;
+                walk_state->thread->current_sync_level =
+                    obj_desc->mutex.original_sync_level;
+        }
         return_ACPI_STATUS(status);
 }
 
diff --git a/drivers/acpi/executer/exutils.c b/drivers/acpi/executer/exutils.c
index c40b191f70b5..fd543ee547ae 100644
--- a/drivers/acpi/executer/exutils.c
+++ b/drivers/acpi/executer/exutils.c
@@ -278,7 +278,8 @@ void acpi_ex_acquire_global_lock(u32 field_flags)
  *
  * FUNCTION:    acpi_ex_release_global_lock
  *
- * PARAMETERS:  None
+ * PARAMETERS:  field_flags           - Flags with Lock rule:
+ *                                      always_lock or never_lock
  *
  * RETURN:      None
  *
@@ -286,12 +287,18 @@ void acpi_ex_acquire_global_lock(u32 field_flags)
  *
  ******************************************************************************/
 
-void acpi_ex_release_global_lock(void)
+void acpi_ex_release_global_lock(u32 field_flags)
 {
         acpi_status status;
 
         ACPI_FUNCTION_TRACE(ex_release_global_lock);
 
+        /* Only use the lock if the always_lock bit is set */
+
+        if (!(field_flags & AML_FIELD_LOCK_RULE_MASK)) {
+                return_VOID;
+        }
+
         /* Release the global lock */
 
         status = acpi_ex_release_mutex_object(acpi_gbl_global_lock_mutex);