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| author | Dmitry Osipenko <dmitry.osipenko@collabora.com> | 2022-05-10 01:32:12 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2022-05-19 19:30:30 +0200 |
| commit | 7b9a3de9ffe76e4a965bafe26c91d9c6351e1e18 (patch) | |
| tree | e27d818c64d6617b818c69f3be935552988a8bfc /kernel/reboot.c | |
| parent | kernel/reboot: Introduce sys-off handler API (diff) | |
| download | linux-7b9a3de9ffe76e4a965bafe26c91d9c6351e1e18.tar.xz linux-7b9a3de9ffe76e4a965bafe26c91d9c6351e1e18.zip | |
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: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'kernel/reboot.c')
| -rw-r--r-- | kernel/reboot.c | 44 |
1 files changed, 42 insertions, 2 deletions
diff --git a/kernel/reboot.c b/kernel/reboot.c index 3e6867ee61e0..96f681f7b20c 100644 --- a/kernel/reboot.c +++ b/kernel/reboot.c @@ -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"); |