linux-kernel - Re: [PATCH] gpu: do not double put device node in zx_drm

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Message-ID: <5B913EF2.1010209@huawei.com>
Date:   Thu, 6 Sep 2018 22:51:30 +0800
From:   zhong jiang <zhongjiang@...wei.com>
To:     <shawnguo@...nel.org>, <airlied@...ux.ie>, <noralf@...nnes.org>,
        <daniel.vetter@...el.com>
CC:     <dri-devel@...ts.freedesktop.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] gpu: do not double put device node in zx_drm_probe

+to maintainer.
On 2018/8/17 10:24, zhong jiang wrote:
> for_each_available_child_of_node will get and put the node properly,
> the following of_node_put will lead to the double put. So just
> remove it.
>
> Signed-off-by: zhong jiang <zhongjiang@...wei.com>gg
> ---
>  drivers/gpu/drm/zte/zx_drm_drv.c | 4 +---
>  1 file changed, 1 insertion(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/zte/zx_drm_drv.c b/drivers/gpu/drm/zte/zx_drm_drv.c
> index 6f4205e8..d7b9870 100644
> --- a/drivers/gpu/drm/zte/zx_drm_drv.c
> +++ b/drivers/gpu/drm/zte/zx_drm_drv.c
> @@ -161,10 +161,8 @@ static int zx_drm_probe(struct platform_device *pdev)
>  	if (ret)
>  		return ret;
>  
> -	for_each_available_child_of_node(parent, child) {
> +	for_each_available_child_of_node(parent, child)
>  		component_match_add(dev, &match, compare_of, child);
> -		of_node_put(child);
> -	}
>  
>  	return component_master_add_with_match(dev, &zx_drm_master_ops, match);
>  }