Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-29 15:41:36 +00:00
Code Issues Packages Projects Releases Wiki Activity

ACPI / processor: do not mark present at boot but not onlined CPU as onlined

Browse Source 
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>
This commit is contained in:
Igor Mammedov 2014-05-05 22:49:49 +02:00 committed by Rafael J. Wysocki
parent 89ca3b8819
commit 0b9d46dd7d
1 changed files with 0 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/acpi/acpi_processor.c
View File

@ -405,7 +405,6 @@ static int acpi_processor_add(struct acpi_device *device,
goto err;
pr->dev = dev;
dev->offline = pr->flags.need_hotplug_init;
/* Trigger the processor driver's .probe() if present. */
if (device_attach(dev) >= 0)