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Commit e311404f authored by Juergen Gross's avatar Juergen Gross Committed by Rafael J. Wysocki
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ACPI / PAD: don't register acpi_pad driver if running as Xen dom0 



When running as Xen dom0 a special processor_aggregator driver is
needed.  Don't register the standard driver in this case.

Without that check an error message:

"Error: Driver 'processor_aggregator' is already registered,
aborting..."

will be displayed.

Signed-off-by: default avatarJuergen Gross <jgross@suse.com>
[ rjw: Minor fixups ]
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent c8d2bc9b

drivers/acpi/acpi_pad.c

+5 −0
Original line number Diff line number Diff line
@@ -26,6 +26,7 @@ 
#include <linux/slab.h>

#include <linux/acpi.h>

#include <asm/mwait.h>

#include <xen/xen.h>



#define ACPI_PROCESSOR_AGGREGATOR_CLASS	"acpi_pad"

#define ACPI_PROCESSOR_AGGREGATOR_DEVICE_NAME "Processor Aggregator"
@@ -477,6 +478,10 @@ static struct acpi_driver acpi_pad_driver = { 


static int __init acpi_pad_init(void)

{

	/* Xen ACPI PAD is used when running as Xen Dom0. */

	if (xen_initial_domain())

		return -ENODEV;



	power_saving_mwait_init();

	if (power_saving_mwait_eax == 0)

		return -EINVAL;