Re: [PATCH v4] rfkill: Add rfkill-any LED trigger

["Michał Kępień" <kernel@kempniu.pl>]

> On Fri, 2017-01-06 at 07:07 +0100, Michał Kępień wrote:
> > Add a new "global" (i.e. not per-rfkill device) LED trigger, rfkill-
> > any,
> > which may be useful on laptops with a single "radio LED" and multiple
> > radio transmitters.  The trigger is meant to turn a LED on whenever
> > there is at least one radio transmitter active and turn it off
> > otherwise.
> > 
> > Signed-off-by: Michał Kępień <kernel@kempniu.pl>
> > ---
> > Changes from v3:
> > 
> >   - Revert introducing a new bitfield and instead defer LED event
> > firing
> >     to a work queue to prevent conditional locking and ensure the
> >     trigger can really be used from any context.  This also voids the
> >     need to take rfkill_global_mutex before calling
> > rfkill_set_block()
> >     in rfkill_resume().
> 
> Looks better, but
> 
> > +static struct work_struct rfkill_any_work;
> 
> At least on module exit you need to cancel this work.

It is cancelled in rfkill_any_led_trigger_unregister().  It seemed
fitting to do it this way as rfkill_any_work is initialized in
rfkill_any_led_trigger_register().  And if CONFIG_RFKILL_LEDS=n,
rfkill_any_work is neither initialized nor scheduled, so we should be
good as well.  Am I missing something?

-- 
Best regards,
Michał Kępień