linux-kernel - Re: [PATCH] leds: fix build with CONFIG_LEDS

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Date:	Mon, 9 May 2011 08:51:22 -0700
From:	Randy Dunlap <rdunlap@...otime.net>
To:	Esben Haabendal <eha@...edevelopment.dk>
Cc:	akpm@...ux-foundation.org, Richard Purdie <rpurdie@...ys.net>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] leds: fix build with CONFIG_LEDS_TRIGGERS disabled

On Mon,  9 May 2011 11:16:18 +0200 Esben Haabendal wrote:

> Add led_get_trigger_data() function for stubbing out access to trigger_data
> when CONFIG_LEDS_TRIGGERS is disabled.  This fixes builds with
> CONFIG_LEDS_CLASS enabled, which were broken by
> leds-support-automatic-start-of-blinking-with-ledtrig-timer.patch
> 
> Signed-off-by: Esben Haabendal <eha@...edevelopment.dk>

Acked-by: Randy Dunlap <rdunlap@...otime.net>


Thanks.


> ---
>  drivers/leds/led-class.c |    2 +-
>  drivers/leds/leds.h      |    7 +++++++
>  2 files changed, 8 insertions(+), 1 deletions(-)
> 
> diff --git a/drivers/leds/led-class.c b/drivers/leds/led-class.c
> index d7bdef8..dc3d3d8 100644
> --- a/drivers/leds/led-class.c
> +++ b/drivers/leds/led-class.c
> @@ -131,7 +131,7 @@ static void led_set_software_blink(struct led_classdev *led_cdev,
>  	if (!led_cdev->blink_brightness)
>  		led_cdev->blink_brightness = led_cdev->max_brightness;
>  
> -	if (led_cdev->trigger_data &&
> +	if (led_get_trigger_data(led_cdev) &&
>  	    delay_on == led_cdev->blink_delay_on &&
>  	    delay_off == led_cdev->blink_delay_off)
>  		return;
> diff --git a/drivers/leds/leds.h b/drivers/leds/leds.h
> index 2dd8ecb..e77c7f8 100644
> --- a/drivers/leds/leds.h
> +++ b/drivers/leds/leds.h
> @@ -40,10 +40,17 @@ void led_trigger_set_default(struct led_classdev *led_cdev);
>  void led_trigger_set(struct led_classdev *led_cdev,
>  			struct led_trigger *trigger);
>  void led_trigger_remove(struct led_classdev *led_cdev);
> +
> +static inline void *led_get_trigger_data(struct led_classdev *led_cdev)
> +{
> +	return led_cdev->trigger_data;
> +}
> +
>  #else
>  #define led_trigger_set_default(x) do {} while (0)
>  #define led_trigger_set(x, y) do {} while (0)
>  #define led_trigger_remove(x) do {} while (0)
> +#define led_get_trigger_data(x) (NULL)
>  #endif
>  
>  ssize_t led_trigger_store(struct device *dev, struct device_attribute *attr,
> -- 


---
~Randy
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