Hi Sakari, On Wed 09 Jun 21, 15:27, Sakari Ailus wrote: > Hi Paul, > > On Wed, Jun 09, 2021 at 01:54:57PM +0200, Paul Kocialkowski wrote: > > A dedicated subdev notified is registered when using the helper > > dedicated to sensors (v4l2_async_register_subdev_sensor_common), > > but this is not the case when a driver uses v4l2_async_register_subdev > > directly. > > Is this a problem? > > The notifier unregistration and cleanup functions should be safe to call on > a notifier that's not been initialised or registered. The same goes for > kfree with NULL argument. I think you're right, the functions and kfree are indeed safe. I think I mixed things up with debugging an issue and assumed this was part of the fix I needed. Sorry for the noise! Paul -- Paul Kocialkowski, Bootlin Embedded Linux and kernel engineering https://bootlin.com
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