1 files changed, 11 insertions, 4 deletions

diff --git a/include/linux/wmi.h b/include/linux/wmi.h
index 14fb644e1701..d723e4b1cafb 100644
--- a/include/linux/wmi.h
+++ b/include/linux/wmi.h
@@ -64,9 +64,13 @@ ssize_t wmi_string_from_utf8s(struct wmi_string *str, size_t max_chars, const u8
 			      size_t src_length);
 
 int wmidev_invoke_method(struct wmi_device *wdev, u8 instance, u32 method_id,
-			 const struct wmi_buffer *in, struct wmi_buffer *out);
+			 const struct wmi_buffer *in, struct wmi_buffer *out, size_t min_size);
 
-int wmidev_query_block(struct wmi_device *wdev, u8 instance, struct wmi_buffer *out);
+int wmidev_invoke_procedure(struct wmi_device *wdev, u8 instance, u32 method_id,
+			    const struct wmi_buffer *in);
+
+int wmidev_query_block(struct wmi_device *wdev, u8 instance, struct wmi_buffer *out,
+		       size_t min_size);
 
 int wmidev_set_block(struct wmi_device *wdev, u8 instance, const struct wmi_buffer *in);
 
@@ -83,7 +87,7 @@ u8 wmidev_instance_count(struct wmi_device *wdev);
  * struct wmi_driver - WMI driver structure
  * @driver: Driver model structure
  * @id_table: List of WMI GUIDs supported by this driver
- * @no_notify_data: Driver supports WMI events which provide no event data
+ * @min_event_size: Minimum event payload size supported by this driver
  * @no_singleton: Driver can be instantiated multiple times
  * @probe: Callback for device binding
  * @remove: Callback for device unbinding
@@ -93,11 +97,14 @@ u8 wmidev_instance_count(struct wmi_device *wdev);
  *
  * This represents WMI drivers which handle WMI devices. The data inside the buffer
  * passed to the @notify_new callback is guaranteed to be aligned on a 8-byte boundary.
+ * The minimum supported size for said buffer can be specified using @min_event_size.
+ * WMI drivers that still use the deprecated @notify callback can still set @min_event_size
+ * to 0 in order to signal that they support WMI events which provide no event data.
  */
 struct wmi_driver {
 	struct device_driver driver;
 	const struct wmi_device_id *id_table;
-	bool no_notify_data;
+	size_t min_event_size;
 	bool no_singleton;
 
 	int (*probe)(struct wmi_device *wdev, const void *context);