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| author | Dave Airlie <airlied@redhat.com> | 2017-03-28 10:34:19 +0300 |
|---|---|---|
| committer | Dave Airlie <airlied@redhat.com> | 2017-03-28 10:34:19 +0300 |
| commit | e5c1ff14757afe21733ddee9cc4bbaeaeadbf803 (patch) | |
| tree | 0da1c9aaf772fac30fe68590a4ca1c3dd439cebd /drivers/cpuidle/sysfs.c | |
| parent | 65d1086c44791112188f6aebbdc3a27cab3736d3 (diff) | |
| parent | c02ed2e75ef4c74e41e421acb4ef1494671585e8 (diff) | |
| download | linux-e5c1ff14757afe21733ddee9cc4bbaeaeadbf803.tar.xz | |
Backmerge tag 'v4.11-rc4' into drm-next
Linux 4.11-rc4
The i915 GVT team need the rc4 code to base some more code on.
Diffstat (limited to 'drivers/cpuidle/sysfs.c')
| -rw-r--r-- | drivers/cpuidle/sysfs.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/cpuidle/sysfs.c b/drivers/cpuidle/sysfs.c index c5adc8c9ac43..ae948b1da93a 100644 --- a/drivers/cpuidle/sysfs.c +++ b/drivers/cpuidle/sysfs.c @@ -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; |