Notifiers can be registered as root notifiers (identified by a 'struct
v4l2_device *') or subdevice notifiers (identified by a 'struct
v4l2_subdev *'). In order to identify a notifier no matter if it is root
or not, add a 'struct fwnode_handle *owner' field, whose name can be
printed out for debug purposes.
Signed-off-by: Jacopo Mondi <jacopo+renesas@xxxxxxxxxx>
---
drivers/media/v4l2-core/v4l2-async.c | 2 ++
include/media/v4l2-async.h | 2 ++
2 files changed, 4 insertions(+)
diff --git a/drivers/media/v4l2-core/v4l2-async.c b/drivers/media/v4l2-core/v4l2-async.c
index a6bddff..0a1bf1d 100644
--- a/drivers/media/v4l2-core/v4l2-async.c
+++ b/drivers/media/v4l2-core/v4l2-async.c
@@ -447,6 +447,7 @@ int v4l2_async_notifier_register(struct v4l2_device *v4l2_dev,
return -EINVAL;
notifier->v4l2_dev = v4l2_dev;
+ notifier->owner = dev_fwnode(v4l2_dev->dev);
ret = __v4l2_async_notifier_register(notifier);
if (ret)
@@ -465,6 +466,7 @@ int v4l2_async_subdev_notifier_register(struct v4l2_subdev *sd,
return -EINVAL;
notifier->sd = sd;
+ notifier->owner = dev_fwnode(sd->dev);
ret = __v4l2_async_notifier_register(notifier);
if (ret)
diff --git a/include/media/v4l2-async.h b/include/media/v4l2-async.h
index 6152434..a15c01d 100644
--- a/include/media/v4l2-async.h
+++ b/include/media/v4l2-async.h
@@ -106,6 +106,7 @@ struct v4l2_async_notifier_operations {
* @v4l2_dev: v4l2_device of the root notifier, NULL otherwise
* @sd: sub-device that registered the notifier, NULL otherwise
* @parent: parent notifier
+ * @owner: reference to notifier fwnode_handle, mostly useful for debug
* @waiting: list of struct v4l2_async_subdev, waiting for their drivers
* @done: list of struct v4l2_subdev, already probed
* @list: member in a global list of notifiers
@@ -118,6 +119,7 @@ struct v4l2_async_notifier {
struct v4l2_device *v4l2_dev;
struct v4l2_subdev *sd;
struct v4l2_async_notifier *parent;
+ struct fwnode_handle *owner;
struct list_head waiting;
struct list_head done;
struct list_head list;
--
2.7.4
