linux-kernel - Re: [PATCH] LEDs: fix check for return value of blink

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Date:	Fri, 10 Dec 2010 14:43:56 +0000
From:	Richard Purdie <rpurdie@...ux.intel.com>
To:	Vasily Khoruzhick <anarsoul@...il.com>,
	akpm <akpm@...ux-foundation.org>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] LEDs: fix check for return value of blink_set callback

On Fri, 2010-12-10 at 11:58 +0200, Vasily Khoruzhick wrote:
> blink_set callback should return 0 on success, but check in
> led-class.c is invalid. It results in software fallback even if
> hw support is available.
> 
> Signed-off-by: Vasily Khoruzhick <anarsoul@...il.com>

Acked-by: Richard Purdie <rpurdie@...ux.intel.com>

> ---
>  drivers/leds/led-class.c |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
> 
> diff --git a/drivers/leds/led-class.c b/drivers/leds/led-class.c
> index 211e21f..d5a4ade 100644
> --- a/drivers/leds/led-class.c
> +++ b/drivers/leds/led-class.c
> @@ -267,7 +267,7 @@ void led_blink_set(struct led_classdev *led_cdev,
>  		   unsigned long *delay_off)
>  {
>  	if (led_cdev->blink_set &&
> -	    led_cdev->blink_set(led_cdev, delay_on, delay_off))
> +	    !led_cdev->blink_set(led_cdev, delay_on, delay_off))
>  		return;
>  
>  	/* blink with 1 Hz as default if nothing specified */


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