Add three helper functions to call async operations callbacks. Besides simplifying callbacks, this allows async notifiers to have no ops set, i.e. it can be left NULL.
Signed-off-by: Sakari Ailus <sakari.ai...@linux.intel.com> --- drivers/media/v4l2-core/v4l2-async.c | 49 ++++++++++++++++++++++++++---------- include/media/v4l2-async.h | 1 + 2 files changed, 37 insertions(+), 13 deletions(-) diff --git a/drivers/media/v4l2-core/v4l2-async.c b/drivers/media/v4l2-core/v4l2-async.c index a2df85ea00f4..c34f93593b41 100644 --- a/drivers/media/v4l2-core/v4l2-async.c +++ b/drivers/media/v4l2-core/v4l2-async.c @@ -25,6 +25,34 @@ #include <media/v4l2-fwnode.h> #include <media/v4l2-subdev.h> +static int v4l2_async_notifier_call_bound(struct v4l2_async_notifier *n, + struct v4l2_subdev *subdev, + struct v4l2_async_subdev *asd) +{ + if (!n->ops || !n->ops->bound) + return 0; + + return n->ops->bound(n, subdev, asd); +} + +static void v4l2_async_notifier_call_unbind(struct v4l2_async_notifier *n, + struct v4l2_subdev *subdev, + struct v4l2_async_subdev *asd) +{ + if (!n->ops || !n->ops->unbind) + return; + + n->ops->unbind(n, subdev, asd); +} + +static int v4l2_async_notifier_call_complete(struct v4l2_async_notifier *n) +{ + if (!n->ops || !n->ops->complete) + return 0; + + return n->ops->complete(n); +} + static bool match_i2c(struct v4l2_subdev *sd, struct v4l2_async_subdev *asd) { #if IS_ENABLED(CONFIG_I2C) @@ -102,16 +130,13 @@ static int v4l2_async_match_notify(struct v4l2_async_notifier *notifier, { int ret; - if (notifier->ops->bound) { - ret = notifier->ops->bound(notifier, sd, asd); - if (ret < 0) - return ret; - } + ret = v4l2_async_notifier_call_bound(notifier, sd, asd); + if (ret < 0) + return ret; ret = v4l2_device_register_subdev(notifier->v4l2_dev, sd); if (ret < 0) { - if (notifier->ops->unbind) - notifier->ops->unbind(notifier, sd, asd); + v4l2_async_notifier_call_unbind(notifier, sd, asd); return ret; } @@ -123,8 +148,8 @@ static int v4l2_async_match_notify(struct v4l2_async_notifier *notifier, /* Move from the global subdevice list to notifier's done */ list_move(&sd->async_list, ¬ifier->done); - if (list_empty(¬ifier->waiting) && notifier->ops->complete) - return notifier->ops->complete(notifier); + if (list_empty(¬ifier->waiting)) + return v4l2_async_notifier_call_complete(notifier); return 0; } @@ -210,8 +235,7 @@ void v4l2_async_notifier_unregister(struct v4l2_async_notifier *notifier) list_for_each_entry_safe(sd, tmp, ¬ifier->done, async_list) { v4l2_async_cleanup(sd); - if (notifier->ops->unbind) - notifier->ops->unbind(notifier, sd, sd->asd); + v4l2_async_notifier_call_unbind(notifier, sd, sd->asd); } mutex_unlock(&list_lock); @@ -300,8 +324,7 @@ void v4l2_async_unregister_subdev(struct v4l2_subdev *sd) v4l2_async_cleanup(sd); - if (notifier->ops->unbind) - notifier->ops->unbind(notifier, sd, sd->asd); + v4l2_async_notifier_call_unbind(notifier, sd, sd->asd); mutex_unlock(&list_lock); } diff --git a/include/media/v4l2-async.h b/include/media/v4l2-async.h index 3c48f8b66d12..3bc8a7c0d83f 100644 --- a/include/media/v4l2-async.h +++ b/include/media/v4l2-async.h @@ -164,4 +164,5 @@ int v4l2_async_register_subdev(struct v4l2_subdev *sd); * @sd: pointer to &struct v4l2_subdev */ void v4l2_async_unregister_subdev(struct v4l2_subdev *sd); + #endif -- 2.11.0