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cpuidle: qcom-spm: fix device and OF node leaks at probe

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[ Upstream commit cdc06f912670c8c199d5fa9e78b64b7ed8e871d0 ]

Make sure to drop the reference to the saw device taken by
of_find_device_by_node() after retrieving its driver data during
probe().

Also drop the reference to the CPU node sooner to avoid leaking it in
case there is no saw node or device.

Fixes: 60f3692b5f ("cpuidle: qcom_spm: Detach state machine from main SPM handling")
Signed-off-by: Johan Hovold <johan@kernel.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Johan Hovold 2025-09-08 17:22:12 +02:00 committed by Greg Kroah-Hartman
parent aa30d30772
commit 2af05a03b1
1 changed files with 5 additions and 2 deletions
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7
drivers/cpuidle/cpuidle-qcom-spm.c
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@ -96,20 +96,23 @@ static int spm_cpuidle_register(struct device *cpuidle_dev, int cpu)
return -ENODEV;
saw_node = of_parse_phandle(cpu_node, "qcom,saw", 0);
of_node_put(cpu_node);
if (!saw_node)
return -ENODEV;
pdev = of_find_device_by_node(saw_node);
of_node_put(saw_node);
of_node_put(cpu_node);
if (!pdev)
return -ENODEV;
data = devm_kzalloc(cpuidle_dev, sizeof(*data), GFP_KERNEL);
if (!data)
if (!data) {
put_device(&pdev->dev);
return -ENOMEM;
}
data->spm = dev_get_drvdata(&pdev->dev);
put_device(&pdev->dev);
if (!data->spm)
return -EINVAL;