tree ba3cfad2743cbd70a6d36dfe645c427a1634eeb1
parent 3c0eee3fe6a3a1c745379547c7e7c904aa64f6d5
author Zhao Yakui <yakui.zhao@intel.com> 1294648544 +0800
committer Len Brown <len.brown@intel.com> 1294680904 -0500

ACPI: Check the returned value of set_cpus_allowed_ptr before T-state operation

Now before it executes the T-state operation on one CPU, it will try to
migrate to the target CPU. Especially this is required on the system that
uses the MSR_IA32_THERMAL_CONTROL register to switch T-state.
But unfortunately it doesn't check whether the migration is successful or not.
In such case we will get/set the incorrect T-state on the offline CPU as
it fails in the migration to the offline CPU.

Signed-off-by: Zhao Yakui <yakui.zhao@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>