redonkable/alistair23-linux
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Merge branch 'pm-cpuidle-fixes'

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* pm-cpuidle-fixes:
  cpuidle: Validate cpu_dev in cpuidle_add_sysfs()
This commit is contained in:
Rafael J. Wysocki 2017-03-24 00:43:46 +01:00
parent 6488294e4a ad0a45fd9c
commit 90ff2b729e
1 changed files with 12 additions and 0 deletions
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12
drivers/cpuidle/sysfs.c
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@ -615,6 +615,18 @@ int cpuidle_add_sysfs(struct cpuidle_device *dev)
struct device *cpu_dev = get_cpu_device((unsigned long)dev->cpu);
int error;
/*
* Return if cpu_device is not setup for this CPU.
*
* This could happen if the arch did not set up cpu_device
* since this CPU is not in cpu_present mask and the
* driver did not send a correct CPU mask during registration.
* Without this check we would end up passing bogus
* value for &cpu_dev->kobj in kobject_init_and_add()
*/
if (!cpu_dev)
return -ENODEV;
kdev = kzalloc(sizeof(*kdev), GFP_KERNEL);
if (!kdev)
return -ENOMEM;