linux-kernel - Re: [PATCH] net: fman: Use of_node_put(muram_node) call only once in read_dts

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Message-ID: <cf1c5cc5-58b9-4b89-b0d0-97bf7438a2ca@intel.com>
Date: Thu, 19 Sep 2024 16:07:49 -0700
From: Jacob Keller <jacob.e.keller@...el.com>
To: Markus Elfring <Markus.Elfring@....de>, <netdev@...r.kernel.org>, "David
 S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, "Igal
 Liberman" <igal.liberman@...escale.com>, Jakub Kicinski <kuba@...nel.org>,
	Madalin Bucur <madalin.bucur@....com>, Paolo Abeni <pabeni@...hat.com>, "Sean
 Anderson" <sean.anderson@...o.com>
CC: LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] net: fman: Use of_node_put(muram_node) call only once in
 read_dts_node()



On 9/19/2024 9:15 AM, Markus Elfring wrote:
> From: Markus Elfring <elfring@...rs.sourceforge.net>
> Date: Thu, 19 Sep 2024 18:05:28 +0200
> 
> A of_node_put(muram_node) call was immediately used after a return code
> check for a of_address_to_resource() call in this function implementation.
> Thus use such a function call only once instead directly before the check.
> 
> This issue was transformed by using the Coccinelle software.
> 
> Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
> ---
>  drivers/net/ethernet/freescale/fman/fman.c | 4 +---
>  1 file changed, 1 insertion(+), 3 deletions(-)
> 
> diff --git a/drivers/net/ethernet/freescale/fman/fman.c b/drivers/net/ethernet/freescale/fman/fman.c
> index d96028f01770..8c29ac9dd850 100644
> --- a/drivers/net/ethernet/freescale/fman/fman.c
> +++ b/drivers/net/ethernet/freescale/fman/fman.c
> @@ -2776,15 +2776,13 @@ static struct fman *read_dts_node(struct platform_device *of_dev)
> 
>  	err = of_address_to_resource(muram_node, 0,
>  				     &fman->dts_params.muram_res);
> +	of_node_put(muram_node);
>  	if (err) {
> -		of_node_put(muram_node);
>  		dev_err(&of_dev->dev, "%s: of_address_to_resource() = %d\n",
>  			__func__, err);
>  		goto fman_free;
>  	}
> 
> -	of_node_put(muram_node);
> -

Seems reasonable.

Reviewed-by: Jacob Keller <jacob.e.keller@...el.com>