diff options
| author | Rafael J. Wysocki <[email protected]> | 2007-07-19 01:47:31 -0700 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2007-07-19 10:04:42 -0700 |
| commit | b1457bcc3a00a0446c7f6e2f22fd24b6d8d0a309 (patch) | |
| tree | 57b25b23e861ce5d0aa4e0ddc0a69ed405ae4701 /kernel | |
| parent | 10a1803d667e209914eaada9b95525252f23ec78 (diff) | |
Hibernation: prepare to enter the low power state
During hibernation we call hibernation_ops->prepare() before creating the image,
but then, before saving it, we cancel the power transition by calling
hibernation_ops->finish(). Thus prior to calling hibernation_ops->enter() we
should let the platform firmware know that we're going to enter the low power
state after all.
Signed-off-by: Rafael J. Wysocki <[email protected]>
Cc: Gautham R Shenoy <[email protected]>
Cc: Pavel Machek <[email protected]>
Cc: Nigel Cunningham <[email protected]>
Cc: Oleg Nesterov <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/power/disk.c | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/kernel/power/disk.c b/kernel/power/disk.c index 77ac605bf20a..885c653509c9 100644 --- a/kernel/power/disk.c +++ b/kernel/power/disk.c @@ -205,12 +205,23 @@ int hibernation_restore(int platform_mode) int hibernation_platform_enter(void) { + int error; + if (hibernation_ops) { kernel_shutdown_prepare(SYSTEM_SUSPEND_DISK); - return hibernation_ops->enter(); + /* + * We have cancelled the power transition by running + * hibernation_ops->finish() before saving the image, so we + * should let the firmware know that we're going to enter the + * sleep state after all + */ + error = hibernation_ops->prepare(); + if (!error) + error = hibernation_ops->enter(); } else { - return -ENOSYS; + error = -ENOSYS; } + return error; } /** |