ACPI / sysfs: correctly check failing memory allocation
Since kobject_create_and_add() can fail under memory pressure, its return value needs to be checked against NULL before passing it to sysfs_create_file(). Signed-off-by:Insu Yun <wuninsu@gmail.com> [ rjw: Subject & changelog ] Signed-off-by:
Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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