On Tue, Sep 26, 2017 at 01:25:26AM +0300, Sakari Ailus wrote:

Registering a notifier has required the knowledge of struct v4l2_device
for the reason that sub-devices generally are registered to the
v4l2_device (as well as the media device, also available through
v4l2_device).

This information is not available for sub-device drivers at probe time.

What this patch does is that it allows registering notifiers without
having v4l2_device around. Instead the sub-device pointer is stored in the
notifier. Once the sub-device of the driver that registered the notifier
is registered, the notifier will gain the knowledge of the v4l2_device,
and the binding of async sub-devices from the sub-device driver's notifier
may proceed.

The root notifier's complete callback is only called when all sub-device
notifiers are completed.

This paragraph is actually no longer true. I changed it to:

	The complete callbacks will be called only when the v4l2_device is
	available and no notifier has pending sub-devices to bind.

-- 
Sakari Ailus
e-mail: sakari.ailus-X3B1VOXEql0@public.gmane.org
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