linux-kernel - Re: [PATCH 2/2] clk: renesas: cpg-mssr: automate 'soc' node release in cpg_mssr_reserved

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Message-ID: <9ffe66a3-f091-40c0-92ca-4950610dfd8a@kernel.org>
Date: Thu, 31 Oct 2024 12:07:39 +0100
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Javier Carrasco <javier.carrasco.cruz@...il.com>,
 Geert Uytterhoeven <geert+renesas@...der.be>,
 Michael Turquette <mturquette@...libre.com>, Stephen Boyd
 <sboyd@...nel.org>, Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>
Cc: linux-renesas-soc@...r.kernel.org, linux-clk@...r.kernel.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] clk: renesas: cpg-mssr: automate 'soc' node release
 in cpg_mssr_reserved_init()

On 31/10/2024 00:25, Javier Carrasco wrote:
> Switch to a more robust approach by means of the cleanup attribute,
> which automates the calls to of_node_put() when 'soc' goes out of scope.
> 
> Signed-off-by: Javier Carrasco <javier.carrasco.cruz@...il.com>
> ---
>  drivers/clk/renesas/renesas-cpg-mssr.c | 4 +---
>  1 file changed, 1 insertion(+), 3 deletions(-)
> 
> diff --git a/drivers/clk/renesas/renesas-cpg-mssr.c b/drivers/clk/renesas/renesas-cpg-mssr.c
> index 5dc89b1009fe..bf85501709f0 100644
> --- a/drivers/clk/renesas/renesas-cpg-mssr.c
> +++ b/drivers/clk/renesas/renesas-cpg-mssr.c
> @@ -979,7 +979,7 @@ static void __init cpg_mssr_reserved_exit(struct cpg_mssr_priv *priv)
>  static int __init cpg_mssr_reserved_init(struct cpg_mssr_priv *priv,
>  					 const struct cpg_mssr_info *info)
>  {
> -	struct device_node *soc = of_find_node_by_path("/soc");
> +	struct device_node *soc __free(device_node) = of_find_node_by_path("/soc");
>  	struct device_node *node;
>  	uint32_t args[MAX_PHANDLE_ARGS];
>  	unsigned int *ids = NULL;
> @@ -1022,7 +1022,6 @@ static int __init cpg_mssr_reserved_init(struct cpg_mssr_priv *priv,
>  
>  			ids = krealloc_array(ids, (num + 1), sizeof(*ids), GFP_KERNEL);
>  			if (!ids) {
> -				of_node_put(soc);

You just added this. Don't add code which is immediately removed. It's a
noop or wrong code.

Best regards,
Krzysztof