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[PATCH] suspend: cleanup calling of power off methods.

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In the lead up to 2.6.13 I fixed a large number of reboot problems by
making the calling conventions consistent.  Despite checking and double
checking my work it appears I missed an obvious one.

The S4 suspend code for PM_DISK_PLATFORM was also calling device_shutdown
without setting system_state, and was not calling the appropriate
reboot_notifier.

This patch fixes the bug by replacing the call of device_suspend with
kernel_poweroff_prepare.

Various forms of this failure have been fixed and tracked for a while.

Thanks for tracking this down go to: Alexey Starikovskiy, Meelis Roos
<mroos@linux.ee>, Nigel Cunningham <ncunningham@cyclades.com>, Pierre
Ossman <drzeus-list@drzeus.cx>

History of this bug is at:
http://bugme.osdl.org/show_bug.cgi?id=4320

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Eric W. Biederman 2005-09-22 21:43:46 -07:00 committed by Linus Torvalds
parent e4c94330e3
commit 88d10bbaae
1 changed files with 2 additions and 4 deletions
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6
kernel/power/disk.c
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@ -17,12 +17,12 @@
#include <linux/delay.h>
#include <linux/fs.h>
#include <linux/mount.h>
#include <linux/pm.h>
#include "power.h"
extern suspend_disk_method_t pm_disk_mode;
extern struct pm_ops * pm_ops;
extern int swsusp_suspend(void);
extern int swsusp_write(void);
@ -49,13 +49,11 @@ dev_t swsusp_resume_device;
static void power_down(suspend_disk_method_t mode)
{
unsigned long flags;
int error = 0;
local_irq_save(flags);
switch(mode) {
case PM_DISK_PLATFORM:
device_shutdown();
kernel_power_off_prepare();
error = pm_ops->enter(PM_SUSPEND_DISK);
break;
case PM_DISK_SHUTDOWN: