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

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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>

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Zhao Yakui 2011-01-10 16:35:44 +08:00 • committed by Len Brown

parent 3c0eee3fe6

commit daef1f35ea

1 changed files with 21 additions and 3 deletions

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drivers/acpi/processor_throttling.c

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