linux-kernel - Re: [PATCH v2] platform/x86: dell-laptop: Handle return error form dell_get

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Date:   Tue, 14 Mar 2017 10:28:46 +0100
From:   Pali Rohár <pali.rohar@...il.com>
To:     Arvind Yadav <arvind.yadav.cs@...il.com>
Cc:     mjg59@...f.ucam.org, dvhart@...radead.org, andy@...radead.org,
        platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] platform/x86: dell-laptop: Handle return error form
 dell_get_intensity.

On Thursday 09 March 2017 11:19:56 Arvind Yadav wrote:
> Here, This patch is to handle a return error from dell_get_intensity.
> This change is done using Coccinelle.
> 
> Signed-off-by: Arvind Yadav <arvind.yadav.cs@...il.com>

Ok, seems good. You can add my Acked-By.

> ---
>  drivers/platform/x86/dell-laptop.c | 6 ++++++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/drivers/platform/x86/dell-laptop.c b/drivers/platform/x86/dell-laptop.c
> index f57dd28..7fcf680 100644
> --- a/drivers/platform/x86/dell-laptop.c
> +++ b/drivers/platform/x86/dell-laptop.c
> @@ -2053,11 +2053,17 @@ static int __init dell_init(void)
>  
>  		dell_backlight_device->props.brightness =
>  			dell_get_intensity(dell_backlight_device);
> +		if (dell_backlight_device->props.brightness < 0) {
> +			ret = dell_backlight_device->props.brightness;
> +			goto fail_get_brightness;
> +		}
>  		backlight_update_status(dell_backlight_device);
>  	}
>  
>  	return 0;
>  
> +fail_get_brightness:
> +	backlight_device_unregister(dell_backlight_device);
>  fail_backlight:
>  	dell_cleanup_rfkill();
>  fail_rfkill:

-- 
Pali Rohár
pali.rohar@...il.com