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Commit 772c5399 authored by Jiang Liu's avatar Jiang Liu Committed by Rafael J. Wysocki
Browse files

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



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

Signed-off-by: default avatarJiang Liu <jiang.liu@linux.intel.com>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent 8b296d94

drivers/xen/xen-acpi-pad.c

+7 −19
Original line number Diff line number Diff line
@@ -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);

}