linux-kernel - [PATCH 1/3] soc: imx: Use device-managed APIs for i.MX9

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Message-Id: <20251217-soc-imx9-fix-v1-1-0c763c2dbe29@nxp.com>
Date: Wed, 17 Dec 2025 20:42:07 +0800
From: "Peng Fan (OSS)" <peng.fan@....nxp.com>
To: Shawn Guo <shawnguo@...nel.org>, Sascha Hauer <s.hauer@...gutronix.de>, 
 Pengutronix Kernel Team <kernel@...gutronix.de>, 
 Fabio Estevam <festevam@...il.com>
Cc: imx@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org, 
 linux-kernel@...r.kernel.org, Peng Fan <peng.fan@....com>
Subject: [PATCH 1/3] soc: imx: Use device-managed APIs for i.MX9

From: Peng Fan <peng.fan@....com>

Use device-managed APi to simplify code.

Signed-off-by: Peng Fan <peng.fan@....com>
---
 drivers/soc/imx/soc-imx9.c | 28 +++++++++-------------------
 1 file changed, 9 insertions(+), 19 deletions(-)

diff --git a/drivers/soc/imx/soc-imx9.c b/drivers/soc/imx/soc-imx9.c
index b46d22cf0212c3f40f61ec5be85ca11e5d3207ac..0b1c59c7ddb244549bfeedc47ae6e8d83c20b39b 100644
--- a/drivers/soc/imx/soc-imx9.c
+++ b/drivers/soc/imx/soc-imx9.c
@@ -18,6 +18,7 @@
 
 static int imx9_soc_probe(struct platform_device *pdev)
 {
+	struct device *dev = &pdev->dev;
 	struct soc_device_attribute *attr;
 	struct arm_smccc_res res;
 	struct soc_device *sdev;
@@ -25,17 +26,17 @@ static int imx9_soc_probe(struct platform_device *pdev)
 	u64 uid127_64, uid63_0;
 	int err;
 
-	attr = kzalloc(sizeof(*attr), GFP_KERNEL);
+	attr = devm_kzalloc(dev, sizeof(*attr), GFP_KERNEL);
 	if (!attr)
 		return -ENOMEM;
 
 	err = of_property_read_string(of_root, "model", &attr->machine);
 	if (err) {
 		pr_err("%s: missing model property: %d\n", __func__, err);
-		goto attr;
+		return err;
 	}
 
-	attr->family = kasprintf(GFP_KERNEL, "Freescale i.MX");
+	attr->family = devm_kasprintf(dev, GFP_KERNEL, "Freescale i.MX");
 
 	/*
 	 * Retrieve the soc id, rev & uid info:
@@ -47,39 +48,28 @@ static int imx9_soc_probe(struct platform_device *pdev)
 	arm_smccc_smc(IMX_SIP_GET_SOC_INFO, 0, 0, 0, 0, 0, 0, 0, &res);
 	if (res.a0 != SMCCC_RET_SUCCESS) {
 		pr_err("%s: SMC failed: 0x%lx\n", __func__, res.a0);
-		err = -EINVAL;
-		goto family;
+		return -EINVAL;
 	}
 
 	soc_id = SOC_ID(res.a1);
 	rev_major = SOC_REV_MAJOR(res.a1);
 	rev_minor = SOC_REV_MINOR(res.a1);
 
-	attr->soc_id = kasprintf(GFP_KERNEL, "i.MX%2x", soc_id);
-	attr->revision = kasprintf(GFP_KERNEL, "%d.%d", rev_major, rev_minor);
+	attr->soc_id = devm_kasprintf(dev, GFP_KERNEL, "i.MX%2x", soc_id);
+	attr->revision = devm_kasprintf(dev, GFP_KERNEL, "%d.%d", rev_major, rev_minor);
 
 	uid127_64 = res.a2;
 	uid63_0 = res.a3;
-	attr->serial_number = kasprintf(GFP_KERNEL, "%016llx%016llx", uid127_64, uid63_0);
+	attr->serial_number = devm_kasprintf(dev, GFP_KERNEL, "%016llx%016llx", uid127_64, uid63_0);
 
 	sdev = soc_device_register(attr);
 	if (IS_ERR(sdev)) {
 		err = PTR_ERR(sdev);
 		pr_err("%s failed to register SoC as a device: %d\n", __func__, err);
-		goto serial_number;
+		return err;
 	}
 
 	return 0;
-
-serial_number:
-	kfree(attr->serial_number);
-	kfree(attr->revision);
-	kfree(attr->soc_id);
-family:
-	kfree(attr->family);
-attr:
-	kfree(attr);
-	return err;
 }
 
 static __maybe_unused const struct of_device_id imx9_soc_match[] = {

-- 
2.37.1