Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1206852

Re: [PATCH/RFC v5 01/57] leds: Add brightness_set_nonblocking op

Show all headers | View raw

On Thu 2015-08-13 16:15:47, Andrew Lunn wrote:
> On Tue, Aug 11, 2015 at 11:37:14AM +0200, Jacek Anaszewski wrote:
> > This patch adds a new brightness_set_nonblocking op to the LED subsystem.
> > The op is intended for drivers that set brightness in a non-blocking way,
> > i.e. they neither sleep nor use delays while setting brightness.
> > 
> > Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>
> > Cc: Bryan Wu <cooloney@gmail.com>
> > Cc: Andrew Lunn <andrew@lunn.ch>
> > Cc: Sakari Ailus <sakari.ailus@linux.intel.com>
> > Cc: Pavel Machek <pavel@ucw.cz>
> > Cc: Stas Sergeev <stsp@users.sourceforge.net>
> > ---
> >  include/linux/leds.h |    3 +++
> >  1 file changed, 3 insertions(+)
> > 
> > diff --git a/include/linux/leds.h b/include/linux/leds.h
> > index b122eea..c32f1b8 100644
> > --- a/include/linux/leds.h
> > +++ b/include/linux/leds.h
> > @@ -53,6 +53,9 @@ struct led_classdev {
> >  	/* Must not sleep, use a workqueue if needed */
> >  	void		(*brightness_set)(struct led_classdev *led_cdev,
> >  					  enum led_brightness brightness);
> > +	/* Intended for drivers that set brightness in a non-blocking way */
> > +	void (*brightness_set_nonblocking)(struct led_classdev *led_cdev,
> > +					  enum led_brightness brightness);
> 
> Hi Jacek
> 
> >From an API design point of view, i'm not sure this is the best way to
> go. You now have two calls which do the same thing, with the plan that
> you want to invert the meaning of brightness_set, the old well known
> API call, sometime later. This inverting the meaning is going to catch
> people out and introduce bugs.

Yes please.
									Pavel

-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Back to linux.kernel | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

[PATCH/RFC v5 01/57] leds: Add brightness_set_nonblocking op Jacek Anaszewski <j.anaszewski@samsung.com> - 2015-08-11 12:00 +0200
  Re: [PATCH/RFC v5 01/57] leds: Add brightness_set_nonblocking op Pavel Machek <pavel@ucw.cz> - 2015-08-13 16:30 +0200
  Re: [PATCH/RFC v5 01/57] leds: Add brightness_set_nonblocking op Andrew Lunn <andrew@lunn.ch> - 2015-08-13 16:30 +0200
    Re: [PATCH/RFC v5 01/57] leds: Add brightness_set_nonblocking op Jacek Anaszewski <j.anaszewski@samsung.com> - 2015-08-14 10:00 +0200
      Re: [PATCH/RFC v5 01/57] leds: Add brightness_set_nonblocking op Jacek Anaszewski <j.anaszewski@samsung.com> - 2015-08-19 16:10 +0200
        Re: [PATCH/RFC v5 01/57] leds: Add brightness_set_nonblocking op Andrew Lunn <andrew@lunn.ch> - 2015-08-19 16:20 +0200

csiph-web