[PATCH AUTOSEL 5.13 092/108] thermal/drivers/sprd: Add missing of_node_put for loop iteration

Sasha Levin
2021-07-14T19:42:26Z

From: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.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@canonical.com>
Acked-by: Chunyan Zhang <zhang.lyra@gmail.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20210614192230.19248-2-krzysztof.kozlowski@canonical.com
Signed-off-by: Sasha Levin <sashal@kernel.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 3682edb2f466..76a2caa9c265 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