Commit 7b9a3de9 authored by Dmitry Osipenko's avatar Dmitry Osipenko Committed by Rafael J. Wysocki
Browse files

kernel/reboot: Wrap legacy power-off callbacks into sys-off handlers 



Wrap legacy power-off callbacks into sys-off handlers in order to
support co-existence of both legacy and new callbacks while we're
in process of upgrading legacy callbacks to the new API.

Signed-off-by: default avatarDmitry Osipenko <dmitry.osipenko@collabora.com>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent 232edc2f

kernel/reboot.c

+42 −2
Original line number Diff line number Diff line
@@ -463,6 +463,47 @@ int devm_register_sys_off_handler(struct device *dev, 
}

EXPORT_SYMBOL_GPL(devm_register_sys_off_handler);



static int legacy_pm_power_off_prepare(struct sys_off_data *data)

{

	if (pm_power_off_prepare)

		pm_power_off_prepare();



	return NOTIFY_DONE;

}



static int legacy_pm_power_off(struct sys_off_data *data)

{

	if (pm_power_off)

		pm_power_off();



	return NOTIFY_DONE;

}



/*

 * Register sys-off handlers for legacy PM callbacks. This allows legacy

 * PM callbacks co-exist with the new sys-off API.

 *

 * TODO: Remove legacy handlers once all legacy PM users will be switched

 *       to the sys-off based APIs.

 */

static int __init legacy_pm_init(void)

{

	register_sys_off_handler(SYS_OFF_MODE_POWER_OFF_PREPARE,

				 SYS_OFF_PRIO_DEFAULT,

				 legacy_pm_power_off_prepare, NULL);



	register_sys_off_handler(SYS_OFF_MODE_POWER_OFF, SYS_OFF_PRIO_DEFAULT,

				 legacy_pm_power_off, NULL);



	return 0;

}

core_initcall(legacy_pm_init);



static void do_kernel_power_off_prepare(void)

{

	blocking_notifier_call_chain(&power_off_prep_handler_list, 0, NULL);

}



/**

 *	kernel_power_off - power_off the system

 *
@@ -471,8 +512,7 @@ EXPORT_SYMBOL_GPL(devm_register_sys_off_handler); 
void kernel_power_off(void)

{

	kernel_shutdown_prepare(SYSTEM_POWER_OFF);

	if (pm_power_off_prepare)

		pm_power_off_prepare();

	do_kernel_power_off_prepare();

	migrate_to_reboot_cpu();

	syscore_shutdown();

	pr_emerg("Power down\n");