linux-kernel - [PATCH 3/6] soc: qcom: ice: use scoped device node handling to simplify error paths

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20240813-b4-cleanup-h-of-node-put-other-v1-3-cfb67323a95c@linaro.org>
Date: Tue, 13 Aug 2024 15:09:49 +0200
From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>, 
 Banajit Goswami <bgoswami@...cinc.com>, 
 Bjorn Andersson <andersson@...nel.org>, 
 Konrad Dybcio <konradybcio@...nel.org>
Cc: alsa-devel@...a-project.org, linux-arm-msm@...r.kernel.org, 
 linux-kernel@...r.kernel.org, 
 Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Subject: [PATCH 3/6] soc: qcom: ice: use scoped device node handling to
 simplify error paths

Obtain the device node reference with scoped/cleanup.h to reduce error
handling and make the code a bit simpler.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
---
 drivers/soc/qcom/ice.c | 14 +++++---------
 1 file changed, 5 insertions(+), 9 deletions(-)

diff --git a/drivers/soc/qcom/ice.c b/drivers/soc/qcom/ice.c
index fbab7fe5c652..50be7a9274a1 100644
--- a/drivers/soc/qcom/ice.c
+++ b/drivers/soc/qcom/ice.c
@@ -8,6 +8,7 @@
  */
 
 #include <linux/bitfield.h>
+#include <linux/cleanup.h>
 #include <linux/clk.h>
 #include <linux/delay.h>
 #include <linux/iopoll.h>
@@ -265,7 +266,6 @@ struct qcom_ice *of_qcom_ice_get(struct device *dev)
 {
 	struct platform_device *pdev = to_platform_device(dev);
 	struct qcom_ice *ice;
-	struct device_node *node;
 	struct resource *res;
 	void __iomem *base;
 
@@ -292,15 +292,15 @@ struct qcom_ice *of_qcom_ice_get(struct device *dev)
 	 * (legacy DT binding), then it must at least provide a phandle
 	 * to the ICE devicetree node, otherwise ICE is not supported.
 	 */
-	node = of_parse_phandle(dev->of_node, "qcom,ice", 0);
+	struct device_node *node __free(device_node) = of_parse_phandle(dev->of_node,
+									"qcom,ice", 0);
 	if (!node)
 		return NULL;
 
 	pdev = of_find_device_by_node(node);
 	if (!pdev) {
 		dev_err(dev, "Cannot find device node %s\n", node->name);
-		ice = ERR_PTR(-EPROBE_DEFER);
-		goto out;
+		return ERR_PTR(-EPROBE_DEFER);
 	}
 
 	ice = platform_get_drvdata(pdev);
@@ -308,8 +308,7 @@ struct qcom_ice *of_qcom_ice_get(struct device *dev)
 		dev_err(dev, "Cannot get ice instance from %s\n",
 			dev_name(&pdev->dev));
 		platform_device_put(pdev);
-		ice = ERR_PTR(-EPROBE_DEFER);
-		goto out;
+		return ERR_PTR(-EPROBE_DEFER);
 	}
 
 	ice->link = device_link_add(dev, &pdev->dev, DL_FLAG_AUTOREMOVE_SUPPLIER);
@@ -321,9 +320,6 @@ struct qcom_ice *of_qcom_ice_get(struct device *dev)
 		ice = ERR_PTR(-EINVAL);
 	}
 
-out:
-	of_node_put(node);
-
 	return ice;
 }
 EXPORT_SYMBOL_GPL(of_qcom_ice_get);

-- 
2.43.0