media: v4l2-flash-led-class: Document v4l2_flash_init() references

The v4l2_flash_init() keeps a reference to the ops struct but not to the
config struct (nor anything it contains). Document this.
Signed-off-by: NSakari Ailus <sakari.ailus@linux.intel.com>
Acked-by: NPavel Machek <pavel@ucw.cz>
Acked-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

include/media/v4l2-flash-led-class.h

@@ -112,6 +112,9 @@ static inline struct v4l2_flash *v4l2_ctrl_to_v4l2_flash(struct v4l2_ctrl *c)
  * @config:	initialization data for V4L2 Flash sub-device
  *
  * Create V4L2 Flash sub-device wrapping given LED subsystem device.
+ * The ops pointer is stored by the V4L2 flash framework. No
+ * references are held to config nor its contents once this function
+ * has returned.
  *
  * Returns: A valid pointer, or, when an error occurs, the return
  * value is encoded using ERR_PTR(). Use IS_ERR() to check and
@@ -130,6 +133,9 @@ struct v4l2_flash *v4l2_flash_init(
  * @config:	initialization data for V4L2 Flash sub-device
  *
  * Create V4L2 Flash sub-device wrapping given LED subsystem device.
+ * The ops pointer is stored by the V4L2 flash framework. No
+ * references are held to config nor its contents once this function
+ * has returned.
  *
  * Returns: A valid pointer, or, when an error occurs, the return
  * value is encoded using ERR_PTR(). Use IS_ERR() to check and