linux-kernel - Re: [PATCH/RFC 01/51] leds: Add led_set_brightness

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Message-ID: <20150721095005.GB23841@amd>
Date:	Tue, 21 Jul 2015 11:50:05 +0200
From:	Pavel Machek <pavel@....cz>
To:	Jacek Anaszewski <j.anaszewski@...sung.com>
Cc:	linux-leds@...r.kernel.org, linux-kernel@...r.kernel.org,
	cooloney@...il.com, rpurdie@...ys.net, stsp@...rs.sourceforge.net,
	Andrew Lunn <andrew@...n.ch>,
	Sakari Ailus <sakari.ailus@...ux.intel.com>
Subject: Re: [PATCH/RFC 01/51] leds: Add led_set_brightness_sync to the
 public LED subsystem API

On Fri 2015-07-17 10:46:47, Jacek Anaszewski wrote:
> led_set_brightness_sync function was visible only internally to the
> LED subsystem. It is now being made publicly available since it has
> become apparent that this is a caller who should decide whether
> brightness is to be set in a synchronous or an asynchronous way.
> The function is modified to use brightness_set op as the second
> option if brightness_set_sync is not implemented. Eventually all
> LED subsystem drivers will be modfified to set brightness only in
> a synchronous way with use of brightness_set op and brightness_set_sync
> op will be removed. LED core will take care of calling brightness_set
> op asynchronously if needed.

As I explained before, having single brightness_set callback sometimes
block and sometimes not based on flag elsewhere is a bad design.

> Signed-off-by: Jacek Anaszewski <j.anaszewski@...sung.com>
> Cc: Bryan Wu <cooloney@...il.com>
> Cc: Andrew Lunn <andrew@...n.ch>
> Cc: Sakari Ailus <sakari.ailus@...ux.intel.com>

Nacked-by: Pavel Machek <pavel@....cz>

> ---
>  drivers/leds/leds.h  |   13 -------------
>  include/linux/leds.h |   29 +++++++++++++++++++++++++++++
>  2 files changed, 29 insertions(+), 13 deletions(-)
> 
> diff --git a/drivers/leds/leds.h b/drivers/leds/leds.h
> index bc89d7a..1c026c9 100644
> --- a/drivers/leds/leds.h
> +++ b/drivers/leds/leds.h
> @@ -26,19 +26,6 @@ static inline void led_set_brightness_async(struct led_classdev *led_cdev,
>  		led_cdev->brightness_set(led_cdev, value);
>  }
>  
> -static inline int led_set_brightness_sync(struct led_classdev *led_cdev,
> -					enum led_brightness value)
> -{
> -	int ret = 0;
> -

-- 
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(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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