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

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Message-Id: <20241031-clk-renesas-cpg-mssr-cleanup-v1-2-628274ecbfcb@gmail.com>
Date: Thu, 31 Oct 2024 00:25:57 +0100
From: Javier Carrasco <javier.carrasco.cruz@...il.com>
To: 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, 
 Javier Carrasco <javier.carrasco.cruz@...il.com>
Subject: [PATCH 2/2] clk: renesas: cpg-mssr: automate 'soc' node release in
 cpg_mssr_reserved_init()

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);
 				of_node_put(it.node);
 				return -ENOMEM;
 			}
@@ -1037,7 +1036,6 @@ static int __init cpg_mssr_reserved_init(struct cpg_mssr_priv *priv,
 			num++;
 		}
 	}
-	of_node_put(soc);
 
 	priv->num_reserved_ids	= num;
 	priv->reserved_ids	= ids;

-- 
2.43.0