[PATCH 2/3] Hibernation: Invoke suspend notifications after console switch

Rafael J. Wysocki
2008-01-11T00:25:30Z

From: Rafael J. Wysocki <rjw@sisk.pl>

Following the recent change in the suspend code path, switch consoles before
calling PM notifiers during hibernation.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
---
kernel/power/disk.c | 17 +++++++----------
1 file changed, 7 insertions(+), 10 deletions(-)

Index: linux-2.6/kernel/power/disk.c
===================================================================
--- linux-2.6.orig/kernel/power/disk.c
+++ linux-2.6/kernel/power/disk.c
@@ -458,20 +458,13 @@ static void power_down(void)
while(1);
}

-static void unprepare_processes(void)
-{
- thaw_processes();
- pm_restore_console();
-}
-
static int prepare_processes(void)
{
int error = 0;

- pm_prepare_console();
if (freeze_processes()) {
error = -EBUSY;
- unprepare_processes();
+ thaw_processes();
}
return error;
}
@@ -491,6 +484,7 @@ int hibernate(void)
goto Unlock;
}

+ pm_prepare_console();
error = pm_notifier_call_chain(PM_HIBERNATION_PREPARE);
if (error)
goto Exit;
@@ -530,11 +524,12 @@ int hibernate(void)
swsusp_free();
}
Thaw:
- unprepare_processes();
+ thaw_processes();
Finish:
free_basic_memory_bitmaps();
Exit:
pm_notifier_call_chain(PM_POST_HIBERNATION);
+ pm_restore_console();
atomic_inc(&snapshot_device_available);
Unlock:
mutex_unlock(&pm_mutex);
@@ -603,6 +598,7 @@ static int software_resume(void)
goto Unlock;
}

+ pm_prepare_console();
error = pm_notifier_call_chain(PM_RESTORE_PREPARE);
if (error)
goto Finish;
@@ -626,11 +622,12 @@ static int software_resume(void)

printk(KERN_ERR "PM: Restore failed, recovering.\n");
swsusp_free();
- unprepare_processes();
+ thaw_processes();
Done:
free_basic_memory_bitmaps();
Finish:
pm_notifier_call_chain(PM_POST_RESTORE);
+ pm_restore_console();
atomic_inc(&snapshot_device_available);
/* For success case, the suspend path will release the lock */