From: Rafael J. Wysocki Date: Thu, 19 Jul 2007 08:47:31 +0000 (-0700) Subject: swsusp: fix hibernation code ordering X-Git-Tag: v2.6.23-rc1~461 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=10a1803d667e209914eaada9b95525252f23ec78;p=platform%2Fkernel%2Flinux-3.10.git 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 Acked-by: Pavel Machek Cc: Nigel Cunningham Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- 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 @@ 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;