swsusp: fix hibernation code ordering
Change the code ordering so that hibernation_ops->prepare() is called after
device_suspend(). This is needed so that we don't violate the ACPI
specification, which states that the _PTS and _GTS system-control methods,
executed from acpi_sleep_prepare(), ought to be called after devices have been
put in low power states.
The "Finish" label in hibernation_restore() is moved, because device_suspend()
resumes devices if the suspending of them fails and the restore code ordering
should reflect the hibernation code ordering.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Pavel Machek <pavel@ucw.cz>
Cc: Nigel Cunningham <nigel@nigel.suspend2.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/kernel/power/disk.c b/kernel/power/disk.c
index fa3b43b..77ac605 100644
--- a/kernel/power/disk.c
+++ b/kernel/power/disk.c
@@ -133,15 +133,15 @@
/* Free memory before shutting down devices. */
error = swsusp_shrink_memory();
if (error)
- goto Finish;
-
- error = platform_prepare(platform_mode);
- if (error)
- goto Finish;
+ return error;
suspend_console();
error = device_suspend(PMSG_FREEZE);
if (error)
+ goto Resume_console;
+
+ error = platform_prepare(platform_mode);
+ if (error)
goto Resume_devices;
error = disable_nonboot_cpus();
@@ -159,8 +159,8 @@
Resume_devices:
platform_finish(platform_mode);
device_resume();
+ Resume_console:
resume_console();
- Finish:
return error;
}
@@ -191,8 +191,8 @@
enable_nonboot_cpus();
}
platform_restore_cleanup(platform_mode);
- Finish:
device_resume();
+ Finish:
resume_console();
pm_restore_console();
return error;