linux-kernel - Re: [PATCH] video: backlight: sky81452-backlight: Fix refcount imbalance on error

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Message-ID: <20200819103631.bptd34ij3fid4ych@holly.lan>
Date:   Wed, 19 Aug 2020 11:36:31 +0100
From:   Daniel Thompson <daniel.thompson@...aro.org>
To:     Dinghao Liu <dinghao.liu@....edu.cn>
Cc:     kjlu@....edu, Lee Jones <lee.jones@...aro.org>,
        Jingoo Han <jingoohan1@...il.com>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        Gyungoh Yoo <jack.yoo@...worksinc.com>,
        Bryan Wu <cooloney@...il.com>, dri-devel@...ts.freedesktop.org,
        linux-fbdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] video: backlight: sky81452-backlight: Fix refcount
 imbalance on error

On Wed, Aug 19, 2020 at 11:04:56AM +0800, Dinghao Liu wrote:
> When of_property_read_u32_array() returns an error code, a
> pairing refcount decrement is needed to keep np's refcount
> balanced.
> 
> Fixes: f705806c9f355 ("backlight: Add support Skyworks SKY81452 backlight driver")
> Signed-off-by: Dinghao Liu <dinghao.liu@....edu.cn>

Reviewed-by: Daniel Thompson <daniel.thompson@...aro.org>


> ---
>  drivers/video/backlight/sky81452-backlight.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/video/backlight/sky81452-backlight.c b/drivers/video/backlight/sky81452-backlight.c
> index 0ce181585008..8268ac43d54f 100644
> --- a/drivers/video/backlight/sky81452-backlight.c
> +++ b/drivers/video/backlight/sky81452-backlight.c
> @@ -217,6 +217,7 @@ static struct sky81452_bl_platform_data *sky81452_bl_parse_dt(
>  					num_entry);
>  		if (ret < 0) {
>  			dev_err(dev, "led-sources node is invalid.\n");
> +			of_node_put(np);
>  			return ERR_PTR(-EINVAL);
>  		}
>  
> -- 
> 2.17.1
>