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Fix ThinkPad T42 poweroff failure introduced by by "PM: Introduce pm_power_off_prepare"

Browse source 
Commit bd804eba1c ("PM: Introduce
pm_power_off_prepare") caused problems in the poweroff path, as reported by
YOSHIFUJI Hideaki / 吉藤英明.

Generally, sysdev_shutdown() should be called after the ACPI preparation for
powering the system off.  To make it happen, we can separate sysdev_shutdown()
from device_shutdown() and call it directly wherever necessary.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Tested-by: YOSHIFUJI Hideaki / 吉藤英明 <yoshfuji@linux-ipv6.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Rafael J. Wysocki 2007-07-26 16:29:55 +02:00 committed by Linus Torvalds
parent 602033ed59
commit 58b3b71dfa
4 changed files with 7 additions and 2 deletions
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2
drivers/base/power/shutdown.c
View file

@ -44,7 +44,5 @@ void device_shutdown(void)
dev->driver->shutdown(dev);
}
}
sysdev_shutdown();
}

3
include/linux/device.h
View file

@ -551,6 +551,9 @@ extern void put_device(struct device * dev);
/* drivers/base/power/shutdown.c */
extern void device_shutdown(void);
/* drivers/base/sys.c */
extern void sysdev_shutdown(void);
/* drivers/base/firmware.c */
extern int __must_check firmware_register(struct kset *);

1
kernel/power/disk.c
View file

@ -216,6 +216,7 @@ int hibernation_platform_enter(void)
* sleep state after all
*/
error = hibernation_ops->prepare();
sysdev_shutdown();
if (!error)
error = hibernation_ops->enter();
} else {

3
kernel/sys.c
View file

@ -804,6 +804,7 @@ static void kernel_restart_prepare(char *cmd)
blocking_notifier_call_chain(&reboot_notifier_list, SYS_RESTART, cmd);
system_state = SYSTEM_RESTART;
device_shutdown();
sysdev_shutdown();
}
/**
@ -860,6 +861,7 @@ void kernel_shutdown_prepare(enum system_states state)
void kernel_halt(void)
{
kernel_shutdown_prepare(SYSTEM_HALT);
sysdev_shutdown();
printk(KERN_EMERG "System halted.\n");
machine_halt();
}
@ -876,6 +878,7 @@ void kernel_power_off(void)
kernel_shutdown_prepare(SYSTEM_POWER_OFF);
if (pm_power_off_prepare)
pm_power_off_prepare();
sysdev_shutdown();
printk(KERN_EMERG "Power down.\n");
machine_power_off();
}