linux-kernel - [PATCH] i2c: mpc: Removal of of_node_put with _

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Date: Mon, 15 Apr 2024 16:12:20 +0000
From: Abhinav Jain <jain.abhinav177@...il.com>
To: chris.packham@...iedtelesis.co.nz,
	andi.shyti@...nel.org,
	linux-i2c@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc: skhan@...uxfoundation.org,
	javier.carrasco.cruz@...il.com,
	Abhinav Jain <jain.abhinav177@...il.com>,
	Julia Lawall <julia.lawall@...ia.fr>
Subject: [PATCH] i2c: mpc: Removal of of_node_put with __free for auto cleanup

Remove of_node_put from node_ctrl and node struct device_nodes.
Move the declaration to initialization for ensuring scope sanity.

Suggested-by: Julia Lawall <julia.lawall@...ia.fr>
Signed-off-by: Abhinav Jain <jain.abhinav177@...il.com>
---
 drivers/i2c/busses/i2c-mpc.c | 11 ++++-------
 1 file changed, 4 insertions(+), 7 deletions(-)

diff --git a/drivers/i2c/busses/i2c-mpc.c b/drivers/i2c/busses/i2c-mpc.c
index 8d73c0f405ed..c4223556b3b8 100644
--- a/drivers/i2c/busses/i2c-mpc.c
+++ b/drivers/i2c/busses/i2c-mpc.c
@@ -304,13 +304,12 @@ static void mpc_i2c_setup_512x(struct device_node *node,
 					 struct mpc_i2c *i2c,
 					 u32 clock)
 {
-	struct device_node *node_ctrl;
 	void __iomem *ctrl;
 	u32 idx;
 
 	/* Enable I2C interrupts for mpc5121 */
-	node_ctrl = of_find_compatible_node(NULL, NULL,
-					    "fsl,mpc5121-i2c-ctrl");
+	struct device_node *node_ctrl __free(device_node) =
+		of_find_compatible_node(NULL, NULL, "fsl,mpc5121-i2c-ctrl");
 	if (node_ctrl) {
 		ctrl = of_iomap(node_ctrl, 0);
 		if (ctrl) {
@@ -321,7 +320,6 @@ static void mpc_i2c_setup_512x(struct device_node *node,
 			setbits32(ctrl, 1 << (24 + idx * 2));
 			iounmap(ctrl);
 		}
-		of_node_put(node_ctrl);
 	}
 
 	/* The clock setup for the 52xx works also fine for the 512x */
@@ -358,11 +356,11 @@ static const struct mpc_i2c_divider mpc_i2c_dividers_8xxx[] = {
 
 static u32 mpc_i2c_get_sec_cfg_8xxx(void)
 {
-	struct device_node *node;
 	u32 __iomem *reg;
 	u32 val = 0;
 
-	node = of_find_node_by_name(NULL, "global-utilities");
+	struct device_node *node __free(device_node) =
+		of_find_node_by_name(NULL, "global-utilities");
 	if (node) {
 		const u32 *prop = of_get_property(node, "reg", NULL);
 		if (prop) {
@@ -383,7 +381,6 @@ static u32 mpc_i2c_get_sec_cfg_8xxx(void)
 			iounmap(reg);
 		}
 	}
-	of_node_put(node);
 
 	return val;
 }
-- 
2.34.1