diff options
Diffstat (limited to 'drivers/acpi/processor_driver.c')
| -rw-r--r-- | drivers/acpi/processor_driver.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/acpi/processor_driver.c b/drivers/acpi/processor_driver.c index eab8cdad7dc3..8697a82bd465 100644 --- a/drivers/acpi/processor_driver.c +++ b/drivers/acpi/processor_driver.c @@ -262,11 +262,16 @@ err_power_exit: static int acpi_processor_start(struct device *dev) { struct acpi_device *device = ACPI_COMPANION(dev); + int ret; if (!device) return -ENODEV; - return __acpi_processor_start(device); + /* Protect against concurrent CPU hotplug operations */ + get_online_cpus(); + ret = __acpi_processor_start(device); + put_online_cpus(); + return ret; } static int acpi_processor_stop(struct device *dev) |