Re: [RFC PATCH v4 1/1] serial: core: Start managing serial controllers to enable runtime PM

[Tony Lindgren <tony@atomide.com>]

* Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> [221208 09:12]:
> On Wed, 7 Dec 2022, Tony Lindgren wrote:
> > +	ret = serial_core_add_one_port(drv, port);
> > +	if (ret)
> > +		return ret;
> > +
> > +	mutex_lock(&port_mutex);
> > +
> > +	/* Inititalize a serial core controller device if needed */
> > +	ctrl_dev = serial_core_ctrl_find(drv, port->dev, port->ctrl_id);
> > +	if (!ctrl_dev) {
> > +		ctrl_dev = serial_core_ctrl_device_add(port);
> > +		if (!ctrl_dev)
> > +			goto err_remove_port;
> > +		allocated = true;
> > +	}
> > +
> > +	/* Initialize a serial core port device */
> > +	ret = serial_core_port_device_add(ctrl_dev, port);
> 
> How is ->port_dev supposed to work here?
> 
> ->port_dev is not set until in serial_core_port_device_add() but you made
> serial_core_add_one_port() call before that.

Hmm do you mean you want to call serial_core_add_one_port() later after
serial_core_port_device_add()?

Or are you seeing some uninitialized use of port->port_dev (and not
port->dev)?

Regards,

Tony