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authorRafael J. Wysocki <rjw@sisk.pl>2007-07-19 01:47:31 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-07-19 10:04:42 -0700
commit10a1803d667e209914eaada9b95525252f23ec78 (patch)
tree0969e95d7f55d62aa8a5a3a0dd616fe4e151323e /kernel/power
parenta634cc10164d1c229fbeca33923e6a0ed939e894 (diff)
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>
Diffstat (limited to 'kernel/power')
-rw-r--r--kernel/power/disk.c14
1 files changed, 7 insertions, 7 deletions
diff --git a/kernel/power/disk.c b/kernel/power/disk.c
index fa3b43b7206..77ac605bf20 100644
--- a/kernel/power/disk.c
+++ b/kernel/power/disk.c
@@ -133,15 +133,15 @@ int hibernation_snapshot(int platform_mode)
/* 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 @@ int hibernation_snapshot(int platform_mode)
Resume_devices:
platform_finish(platform_mode);
device_resume();
+ Resume_console:
resume_console();
- Finish:
return error;
}
@@ -191,8 +191,8 @@ int hibernation_restore(int platform_mode)
enable_nonboot_cpus();
}
platform_restore_cleanup(platform_mode);
- Finish:
device_resume();
+ Finish:
resume_console();
pm_restore_console();
return error;