linux-kernel - Re: [PATCH/RFC v2 1/5] leds: Use set_brightness_work for brightness

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Message-ID: <20150630183016.GA15047@amd>
Date:	Tue, 30 Jun 2015 20:30:16 +0200
From:	Pavel Machek <pavel@...x.de>
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,
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Subject: Re: [PATCH/RFC v2 1/5] leds: Use set_brightness_work for
 brightness_set ops that can sleep


>  
>  	/* Set LED brightness level */
>  	/* Must not sleep, use a workqueue if needed */
>  	void		(*brightness_set)(struct led_classdev *led_cdev,
>  					  enum led_brightness brightness);
> -	/*
> -	 * Set LED brightness level immediately - it can block the caller for
> -	 * the time required for accessing a LED device register.
> -	 */
> -	int		(*brightness_set_sync)(struct led_classdev *led_cdev,
> -					enum led_brightness brightness);
>  	/* Get LED brightness level */
>  	enum led_brightness (*brightness_get)(struct led_classdev *led_cdev);
>

NAK. Feel free to rearrange the code so that driver's work is easier,
but keep separate callbacks for "can sleep" and "can not sleep"
situations. 4 bytes are not worth the confusion.
									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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