linux-kernel - [PATCH] spi: spi-s3c64xx.c: Remove of_node

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Date: Thu, 18 Apr 2024 00:05:05 +0000
From: Shivani Gupta <shivani07g@...il.com>
To: andi.shyti@...nel.org,
	broonie@...nel.org,
	krzysztof.kozlowski@...aro.org,
	alim.akhtar@...sung.com
Cc: linux-spi@...r.kernel.org,
	linux-samsung-soc@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	skhan@...uxfoundation.org,
	javier.carrasco.cruz@...il.com,
	Shivani Gupta <shivani07g@...il.com>,
	Julia Lawall <julia.lawall@...ia.fr>
Subject: [PATCH] spi: spi-s3c64xx.c: Remove of_node_put for auto cleanup

Use the scope based of_node_put() cleanup in s3c64xx_spi_csinfo to
automatically release the device node with the __free() cleanup handler
Initialize data_np at the point of declaration for clarity of scope.

This change reduces the risk of memory leaks and simplifies the code by
removing manual node put call.

Suggested-by: Julia Lawall <julia.lawall@...ia.fr>
Signed-off-by: Shivani Gupta <shivani07g@...il.com>
---
 drivers/spi/spi-s3c64xx.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/spi/spi-s3c64xx.c b/drivers/spi/spi-s3c64xx.c
index f726d8670428..833c58c88e40 100644
--- a/drivers/spi/spi-s3c64xx.c
+++ b/drivers/spi/spi-s3c64xx.c
@@ -950,7 +950,7 @@ static struct s3c64xx_spi_csinfo *s3c64xx_get_target_ctrldata(
 				struct spi_device *spi)
 {
 	struct s3c64xx_spi_csinfo *cs;
-	struct device_node *target_np, *data_np = NULL;
+	struct device_node *target_np;
 	u32 fb_delay = 0;

 	target_np = spi->dev.of_node;
@@ -963,7 +963,8 @@ static struct s3c64xx_spi_csinfo *s3c64xx_get_target_ctrldata(
 	if (!cs)
 		return ERR_PTR(-ENOMEM);

-	data_np = of_get_child_by_name(target_np, "controller-data");
+	struct device_node *data_np __free(device_node) =
+			of_get_child_by_name(target_np, "controller-data");
 	if (!data_np) {
 		dev_info(&spi->dev, "feedback delay set to default (0)\n");
 		return cs;
@@ -971,7 +972,6 @@ static struct s3c64xx_spi_csinfo *s3c64xx_get_target_ctrldata(

 	of_property_read_u32(data_np, "samsung,spi-feedback-delay", &fb_delay);
 	cs->fb_delay = fb_delay;
-	of_node_put(data_np);
 	return cs;
 }

--
2.34.1