linux-kernel - [PATCH 5.10 067/125] thermal/drivers/sprd: Add missing of_node

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Date:   Thu, 22 Jul 2021 18:30:58 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>,
        Chunyan Zhang <zhang.lyra@...il.com>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.10 067/125] thermal/drivers/sprd: Add missing of_node_put for loop iteration

From: Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>

[ Upstream commit d8ac5bb4ae653e092d7429a7587b73f1662d6ad7 ]

Early exits from for_each_available_child_of_node() should decrement the
node reference counter.  Reported by Coccinelle:

  drivers/thermal/sprd_thermal.c:387:1-23: WARNING:
    Function "for_each_child_of_node" should have of_node_put() before goto around lines 391.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>
Acked-by: Chunyan Zhang <zhang.lyra@...il.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@...aro.org>
Link: https://lore.kernel.org/r/20210614192230.19248-2-krzysztof.kozlowski@canonical.com
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/thermal/sprd_thermal.c | 15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)

diff --git a/drivers/thermal/sprd_thermal.c b/drivers/thermal/sprd_thermal.c
index fe06cccf14b3..fff80fc18002 100644
--- a/drivers/thermal/sprd_thermal.c
+++ b/drivers/thermal/sprd_thermal.c
@@ -388,7 +388,7 @@ static int sprd_thm_probe(struct platform_device *pdev)
 		sen = devm_kzalloc(&pdev->dev, sizeof(*sen), GFP_KERNEL);
 		if (!sen) {
 			ret = -ENOMEM;
-			goto disable_clk;
+			goto of_put;
 		}
 
 		sen->data = thm;
@@ -397,13 +397,13 @@ static int sprd_thm_probe(struct platform_device *pdev)
 		ret = of_property_read_u32(sen_child, "reg", &sen->id);
 		if (ret) {
 			dev_err(&pdev->dev, "get sensor reg failed");
-			goto disable_clk;
+			goto of_put;
 		}
 
 		ret = sprd_thm_sensor_calibration(sen_child, thm, sen);
 		if (ret) {
 			dev_err(&pdev->dev, "efuse cal analysis failed");
-			goto disable_clk;
+			goto of_put;
 		}
 
 		sprd_thm_sensor_init(thm, sen);
@@ -416,19 +416,20 @@ static int sprd_thm_probe(struct platform_device *pdev)
 			dev_err(&pdev->dev, "register thermal zone failed %d\n",
 				sen->id);
 			ret = PTR_ERR(sen->tzd);
-			goto disable_clk;
+			goto of_put;
 		}
 
 		thm->sensor[sen->id] = sen;
 	}
+	/* sen_child set to NULL at this point */
 
 	ret = sprd_thm_set_ready(thm);
 	if (ret)
-		goto disable_clk;
+		goto of_put;
 
 	ret = sprd_thm_wait_temp_ready(thm);
 	if (ret)
-		goto disable_clk;
+		goto of_put;
 
 	for (i = 0; i < thm->nr_sensors; i++)
 		sprd_thm_toggle_sensor(thm->sensor[i], true);
@@ -436,6 +437,8 @@ static int sprd_thm_probe(struct platform_device *pdev)
 	platform_set_drvdata(pdev, thm);
 	return 0;
 
+of_put:
+	of_node_put(sen_child);
 disable_clk:
 	clk_disable_unprepare(thm->clk);
 	return ret;
-- 
2.30.2