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cpuidle: lpm-levels: Check for valid pointer during hotplug notifications

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get_cpu_device() can return NULL. Add valid pointer check during hotplug
notifications.

Change-Id: I28234ed609fa45a770bb01203f7b5523532088e7
Signed-off-by: Maulik Shah <mkshah@codeaurora.org>
This commit is contained in:
Maulik Shah 2020-10-12 21:50:33 +05:30
commit 61d682ebe7
1 changed files with 6 additions and 0 deletions
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6
drivers/cpuidle/lpm-levels.c
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@ -161,6 +161,9 @@ static int lpm_offline_cpu(unsigned int cpu)
{
struct device *dev = get_cpu_device(cpu);
if (!dev)
return 0;
dev_pm_qos_remove_notifier(dev, &dev_pm_qos_nb[cpu],
DEV_PM_QOS_RESUME_LATENCY);
return 0;
@ -170,6 +173,9 @@ static int lpm_online_cpu(unsigned int cpu)
{
struct device *dev = get_cpu_device(cpu);
if (!dev)
return 0;
dev_pm_qos_add_notifier(dev, &dev_pm_qos_nb[cpu],
DEV_PM_QOS_RESUME_LATENCY);
return 0;