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authorBob Moore <robert.moore@intel.com>2014-03-24 14:49:00 +0800
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2014-03-26 16:25:59 +0100
commit22b5afce6a0f29f995b0cce83a5033892dd306d8 (patch)
tree5733ad0071177f398108a8932b7d7108bd74c4ca /drivers/acpi/acpica/acdispat.h
parente2b8ddcc6b3fbb860e15c5d52455735e128326aa (diff)
ACPICA: Add auto-serialization support for ill-behaved control methods.
This change adds support to automatically mark a control method as "serialized" if the method creates any named objects. This will positively prevent the method from being entered by more than one thread and thus preventing a possible abort when an attempt is made to create an object twice. Implemented by parsing all non-serialize control methods at table load time. This feature is disabled by default and this patch also adds a new Linux kernel parameter "acpi_auto_serialize" to allow this feature to be turned on for a specific boot. References: https://bugzilla.kernel.org/show_bug.cgi?id=52191 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>
Diffstat (limited to 'drivers/acpi/acpica/acdispat.h')
-rw-r--r--drivers/acpi/acpica/acdispat.h13
1 files changed, 8 insertions, 5 deletions
diff --git a/drivers/acpi/acpica/acdispat.h b/drivers/acpi/acpica/acdispat.h
index 5b472c43c31..d3e2cc395d7 100644
--- a/drivers/acpi/acpica/acdispat.h
+++ b/drivers/acpi/acpica/acdispat.h
@@ -139,20 +139,21 @@ acpi_ds_init_field_objects(union acpi_parse_object *op,
struct acpi_walk_state *walk_state);
/*
- * dsload - Parser/Interpreter interface, pass 1 namespace load callbacks
+ * dsload - Parser/Interpreter interface
*/
acpi_status
acpi_ds_init_callbacks(struct acpi_walk_state *walk_state, u32 pass_number);
+/* dsload - pass 1 namespace load callbacks */
+
acpi_status
acpi_ds_load1_begin_op(struct acpi_walk_state *walk_state,
union acpi_parse_object **out_op);
acpi_status acpi_ds_load1_end_op(struct acpi_walk_state *walk_state);
-/*
- * dsload - Parser/Interpreter interface, pass 2 namespace load callbacks
- */
+/* dsload - pass 2 namespace load callbacks */
+
acpi_status
acpi_ds_load2_begin_op(struct acpi_walk_state *walk_state,
union acpi_parse_object **out_op);
@@ -200,7 +201,9 @@ void acpi_ds_method_data_init(struct acpi_walk_state *walk_state);
/*
* dsmethod - Parser/Interpreter interface - control method parsing
*/
-acpi_status acpi_ds_parse_method(struct acpi_namespace_node *node);
+acpi_status
+acpi_ds_auto_serialize_method(struct acpi_namespace_node *node,
+ union acpi_operand_object *obj_desc);
acpi_status
acpi_ds_call_control_method(struct acpi_thread_state *thread,