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ACPI / PAD / xen: use acpi_evaluate_ost() to replace open-coded version

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Use public function acpi_evaluate_ost() to replace open-coded
version of evaluating ACPI _OST method.

Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Jiang Liu 2014-02-19 14:02:17 +08:00 committed by Rafael J. Wysocki
parent 8b296d9412
commit 772c53990f
1 changed files with 7 additions and 19 deletions
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26
drivers/xen/xen-acpi-pad.c
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@ -77,27 +77,14 @@ static int acpi_pad_pur(acpi_handle handle)
return num;
}
/* Notify firmware how many CPUs are idle */
static void acpi_pad_ost(acpi_handle handle, int stat,
uint32_t idle_nums)
{
union acpi_object params[3] = {
{.type = ACPI_TYPE_INTEGER,},
{.type = ACPI_TYPE_INTEGER,},
{.type = ACPI_TYPE_BUFFER,},
};
struct acpi_object_list arg_list = {3, params};
params[0].integer.value = ACPI_PROCESSOR_AGGREGATOR_NOTIFY;
params[1].integer.value = stat;
params[2].buffer.length = 4;
params[2].buffer.pointer = (void *)&idle_nums;
acpi_evaluate_object(handle, "_OST", &arg_list, NULL);
}
static void acpi_pad_handle_notify(acpi_handle handle)
{
int idle_nums;
struct acpi_buffer param = {
.length = 4,
.pointer = (void *)&idle_nums,
};
mutex_lock(&xen_cpu_lock);
idle_nums = acpi_pad_pur(handle);
@ -109,7 +96,8 @@ static void acpi_pad_handle_notify(acpi_handle handle)
idle_nums = xen_acpi_pad_idle_cpus(idle_nums)
?: xen_acpi_pad_idle_cpus_num();
if (idle_nums >= 0)
acpi_pad_ost(handle, 0, idle_nums);
acpi_evaluate_ost(handle, ACPI_PROCESSOR_AGGREGATOR_NOTIFY,
0, &param);
mutex_unlock(&xen_cpu_lock);
}