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[PATCH] acpi: Don't call acpi_sleep_prepare from acpi_power_off

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Now that all of the code paths that call acpi_power_off
have been modified to call either call kernel_power_off
(which calls apci_sleep_prepare by way of acpi_shutdown)
or to call acpi_sleep_prepare directly it is redundant to call
acpi_sleep_prepare from acpi_power_off.

So simplify the code and simply don't call acpi_sleep_prepare.

In addition there is a little error handling done so if we
can't register the acpi class we don't hook pm_power_off.

I think I have done the right thing with the CONFIG_PM define
but I'm not certain.  Can this code even be compiled if
CONFIG_PM is false?

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Eric W. Biederman 2005-07-26 12:17:52 -06:00 committed by Linus Torvalds
parent 6660316cb7
commit b35c67a46b
1 changed files with 12 additions and 21 deletions
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33
drivers/acpi/sleep/poweroff.c
View file

@ -19,8 +19,6 @@
int acpi_sleep_prepare(u32 acpi_state)
{
/* Flag to do not allow second time invocation for S5 state */
static int shutdown_prepared = 0;
#ifdef CONFIG_ACPI_SLEEP
/* do we have a wakeup address for S2 and S3? */
/* Here, we support only S4BIOS, those we set the wakeup address */
@ -38,27 +36,23 @@ int acpi_sleep_prepare(u32 acpi_state)
acpi_enable_wakeup_device_prep(acpi_state);
#endif
if (acpi_state == ACPI_STATE_S5) {
/* Check if we were already called */
if (shutdown_prepared)
return 0;
acpi_wakeup_gpe_poweroff_prepare();
shutdown_prepared = 1;
}
acpi_enter_sleep_state_prep(acpi_state);
return 0;
}
#ifdef CONFIG_PM
void acpi_power_off(void)
{
/* acpi_sleep_prepare(ACPI_STATE_S5) should have already been called */
printk("%s called\n", __FUNCTION__);
acpi_sleep_prepare(ACPI_STATE_S5);
local_irq_disable();
/* Some SMP machines only can poweroff in boot CPU */
acpi_enter_sleep_state(ACPI_STATE_S5);
}
#ifdef CONFIG_PM
static int acpi_shutdown(struct sys_device *x)
{
return acpi_sleep_prepare(ACPI_STATE_S5);
@ -74,8 +68,6 @@ static struct sys_device device_acpi = {
.cls = &acpi_sysclass,
};
#endif
static int acpi_poweroff_init(void)
{
if (!acpi_disabled) {
@ -85,19 +77,18 @@ static int acpi_poweroff_init(void)
status =
acpi_get_sleep_type_data(ACPI_STATE_S5, &type_a, &type_b);
if (ACPI_SUCCESS(status)) {
pm_power_off = acpi_power_off;
#ifdef CONFIG_PM
{
int error;
error = sysdev_class_register(&acpi_sysclass);
if (!error)
error = sysdev_register(&device_acpi);
return error;
}
#endif
int error;
error = sysdev_class_register(&acpi_sysclass);
if (!error)
error = sysdev_register(&device_acpi);
if (!error)
pm_power_off = acpi_power_off;
return error;
}
}
return 0;
}
late_initcall(acpi_poweroff_init);
#endif /* CONFIG_PM */