Re: [PATHCv10 1/2] usb: USB Type-C connector class

[Oliver Neukum <oneukum@suse.com>]

On Mon, 2016-11-14 at 06:34 -0800, Guenter Roeck wrote:
> >>> +int typec_connect(struct typec_port *port, struct
> typec_connection *con)
> >>> +{
> >>> +   int ret;
> >>> +
> >>> +   if (!con->partner && !con->cable)
> >>> +           return -EINVAL;
> >>> +
> >>> +   port->connected = 1;
> >>> +   port->data_role = con->data_role;
> >>> +   port->pwr_role = con->pwr_role;
> >>> +   port->vconn_role = con->vconn_role;
> >>> +   port->pwr_opmode = con->pwr_opmode;
> >>> +
> >>> +   kobject_uevent(&port->dev.kobj, KOBJ_CHANGE);
> >>
> >> This worries me.  Who is listening for it?  What will you do with
> it?
> >> Shouldn't you just poll on an attribute file instead?
> >
> > Oliver! Did you need this or can we remove it?
> >
> 
> I'll also have to make sure that the Android folks don't use it.

How then do we notify user space? poll()? Yet another demon.

I do not specifically need this, but I note that uevents are the
general tool we use to notify user space of that kind of events.

	Regards
		Oliver