ACPI / processor: do not mark present at boot but not onlined CPU as onlined
authorIgor Mammedov <imammedo@redhat.com>
Mon, 5 May 2014 20:49:49 +0000 (22:49 +0200)
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>
Thu, 8 May 2014 10:59:36 +0000 (12:59 +0200)
commit0b9d46dd7debf8e6dc8614106f1c1909fa8de64d
tree9851c80628b9620d74108913dde488091e235dd9
parent89ca3b881987f5a4be4c5dbaa7f0df12bbdde2fd
ACPI / processor: do not mark present at boot but not onlined CPU as onlined

acpi_processor_add() assumes that present at boot CPUs
are always onlined, it is not so if a CPU failed to become
onlined. As result acpi_processor_add() will mark such CPU
device as onlined in sysfs and following attempts to
online/offline it using /sys/device/system/cpu/cpuX/online
attribute will fail.

Do not poke into device internals in acpi_processor_add()
and touch "struct device { .offline }" attribute, since
for CPUs onlined at boot it's set by:
  topology_init() -> arch_register_cpu() -> register_cpu()
before ACPI device tree is parsed, and for hotplugged
CPUs it's set when userspace onlines CPU via sysfs.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Acked-by: Toshi Kani <toshi.kani@hp.com>
Cc: 3.11+ <stable@vger.kernel.org> # 3.11+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
drivers/acpi/acpi_processor.c