linux-kernel - Re: [PATCH] regulator: add missing call to of_node

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Date:   Thu, 25 Feb 2021 12:04:14 +0000
From:   Cristian Marussi <cristian.marussi@....com>
To:     Yang Li <yang.lee@...ux.alibaba.com>
Cc:     sudeep.holla@....com, lgirdwood@...il.com, broonie@...nel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] regulator: add missing call to of_node_put()

Hi,

thanks for reporting this, you're right but you've missed the braces
around the if block in your patch, because we really want to exit
only on -ENOMEM. Something like:

  	if (ret == -ENOMEM) {
		of_node_put(child);
		return ret;
	}

Regards,

Cristian

On Thu, Feb 25, 2021 at 05:07:26PM +0800, Yang Li wrote:
> In one of the error paths of the for_each_child_of_node() loop,
> add missing call to of_node_put().
> 
> Fix the following coccicheck warning:
> ./drivers/regulator/scmi-regulator.c:343:1-23: WARNING: Function
> "for_each_child_of_node" should have of_node_put() before return around
> line 347.
> 
> Reported-by: Abaci Robot <abaci@...ux.alibaba.com>
> Signed-off-by: Yang Li <yang.lee@...ux.alibaba.com>
> ---
>  drivers/regulator/scmi-regulator.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/regulator/scmi-regulator.c b/drivers/regulator/scmi-regulator.c
> index 0e8b3ca..a41bb06 100644
> --- a/drivers/regulator/scmi-regulator.c
> +++ b/drivers/regulator/scmi-regulator.c
> @@ -344,6 +344,7 @@ static int scmi_regulator_probe(struct scmi_device *sdev)
>  		ret = process_scmi_regulator_of_node(sdev, child, rinfo);
>  		/* abort on any mem issue */
>  		if (ret == -ENOMEM)
> +			of_node_put(child);
>  			return ret;
>  	}
>  
> -- 
> 1.8.3.1
>