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author | Max Krummenacher <max.krummenacher@toradex.com> | 2018-03-13 11:32:58 +0100 |
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committer | Max Krummenacher <max.krummenacher@toradex.com> | 2018-03-13 11:32:58 +0100 |
commit | 6fb9f3c8a4992f67dcb3ce413df2e22e96b2d400 (patch) | |
tree | 6e3071b2f179a62b027669ac2a238383293bf941 /drivers/cpuidle/sysfs.c | |
parent | a126a5e5dc2fcc5cb36af14c89b440cc8e3bab30 (diff) | |
parent | 8b5ab55d254f36e89b1b53aeac7223d2d102483e (diff) |
Merge tag 'v4.4.121' into toradex_vf_4.4-nextColibri-VF_LXDE-Image_2.8b2.97-20180331
This is the 4.4.121 stable release
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 832a2c3f01ff..9e98a5fbbc1d 100644 --- a/drivers/cpuidle/sysfs.c +++ b/drivers/cpuidle/sysfs.c @@ -613,6 +613,18 @@ 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; |