On 1/25/21 10:22 AM, Sakari Ailus wrote:
> From: Ezequiel Garcia <ezequiel@xxxxxxxxxxxxx>
>
> Most -if not all- use-cases are expected to be covered by one of:
> v4l2_async_notifier_add_fwnode_subdev,
> v4l2_async_notifier_add_fwnode_remote_subdev or
> v4l2_async_notifier_add_i2c_subdev.
>
> We'd like to discourage drivers from using v4l2_async_notifier_add_subdev,
> so rename it as __v4l2_async_notifier_add_subdev. This is
> typically a good hint for drivers to avoid using the function.
>
> Signed-off-by: Ezequiel Garcia <ezequiel@xxxxxxxxxxxxx>
> Reviewed-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
> Signed-off-by: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>
Reviewed-by: Helen Koike <helen.koike@xxxxxxxxxxxxx>
> ---
> drivers/media/v4l2-core/v4l2-async.c | 8 ++++----
> drivers/media/v4l2-core/v4l2-fwnode.c | 2 +-
> include/media/v4l2-async.h | 9 +++++++--
> 3 files changed, 12 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/media/v4l2-core/v4l2-async.c b/drivers/media/v4l2-core/v4l2-async.c
> index 1f2b7aa1fca6..bd1944c2d062 100644
> --- a/drivers/media/v4l2-core/v4l2-async.c
> +++ b/drivers/media/v4l2-core/v4l2-async.c
> @@ -603,7 +603,7 @@ void v4l2_async_notifier_cleanup(struct v4l2_async_notifier *notifier)
> }
> EXPORT_SYMBOL_GPL(v4l2_async_notifier_cleanup);
>
> -int v4l2_async_notifier_add_subdev(struct v4l2_async_notifier *notifier,
> +int __v4l2_async_notifier_add_subdev(struct v4l2_async_notifier *notifier,
> struct v4l2_async_subdev *asd)
> {
> int ret;
> @@ -620,7 +620,7 @@ int v4l2_async_notifier_add_subdev(struct v4l2_async_notifier *notifier,
> mutex_unlock(&list_lock);
> return ret;
> }
> -EXPORT_SYMBOL_GPL(v4l2_async_notifier_add_subdev);
> +EXPORT_SYMBOL_GPL(__v4l2_async_notifier_add_subdev);
>
> struct v4l2_async_subdev *
> v4l2_async_notifier_add_fwnode_subdev(struct v4l2_async_notifier *notifier,
> @@ -637,7 +637,7 @@ v4l2_async_notifier_add_fwnode_subdev(struct v4l2_async_notifier *notifier,
> asd->match_type = V4L2_ASYNC_MATCH_FWNODE;
> asd->match.fwnode = fwnode_handle_get(fwnode);
>
> - ret = v4l2_async_notifier_add_subdev(notifier, asd);
> + ret = __v4l2_async_notifier_add_subdev(notifier, asd);
> if (ret) {
> fwnode_handle_put(fwnode);
> kfree(asd);
> @@ -687,7 +687,7 @@ v4l2_async_notifier_add_i2c_subdev(struct v4l2_async_notifier *notifier,
> asd->match.i2c.adapter_id = adapter_id;
> asd->match.i2c.address = address;
>
> - ret = v4l2_async_notifier_add_subdev(notifier, asd);
> + ret = __v4l2_async_notifier_add_subdev(notifier, asd);
> if (ret) {
> kfree(asd);
> return ERR_PTR(ret);
> diff --git a/drivers/media/v4l2-core/v4l2-fwnode.c b/drivers/media/v4l2-core/v4l2-fwnode.c
> index 5353e37eb950..919fde20032e 100644
> --- a/drivers/media/v4l2-core/v4l2-fwnode.c
> +++ b/drivers/media/v4l2-core/v4l2-fwnode.c
> @@ -833,7 +833,7 @@ v4l2_async_notifier_fwnode_parse_endpoint(struct device *dev,
> if (ret < 0)
> goto out_err;
>
> - ret = v4l2_async_notifier_add_subdev(notifier, asd);
> + ret = __v4l2_async_notifier_add_subdev(notifier, asd);
> if (ret < 0) {
> /* not an error if asd already exists */
> if (ret == -EEXIST)
> diff --git a/include/media/v4l2-async.h b/include/media/v4l2-async.h
> index 25c9ebd3f963..ef4ac3559be9 100644
> --- a/include/media/v4l2-async.h
> +++ b/include/media/v4l2-async.h
> @@ -138,17 +138,22 @@ void v4l2_async_debug_init(struct dentry *debugfs_dir);
> void v4l2_async_notifier_init(struct v4l2_async_notifier *notifier);
>
> /**
> - * v4l2_async_notifier_add_subdev - Add an async subdev to the
> + * __v4l2_async_notifier_add_subdev - Add an async subdev to the
> * notifier's master asd list.
> *
> * @notifier: pointer to &struct v4l2_async_notifier
> * @asd: pointer to &struct v4l2_async_subdev
> *
> + * \warning: Drivers should avoid using this function and instead use one of:
> + * @v4l2_async_notifier_add_fwnode_subdev,
> + * @v4l2_async_notifier_add_fwnode_remote_subdev or
> + * @v4l2_async_notifier_add_i2c_subdev.
> + *
> * Call this function before registering a notifier to link the provided @asd to
> * the notifiers master @asd_list. The @asd must be allocated with k*alloc() as
> * it will be freed by the framework when the notifier is destroyed.
> */
> -int v4l2_async_notifier_add_subdev(struct v4l2_async_notifier *notifier,
> +int __v4l2_async_notifier_add_subdev(struct v4l2_async_notifier *notifier,
> struct v4l2_async_subdev *asd);
>
> /**
>
