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| author | Alan Stern <stern@rowland.harvard.edu> | 2007-11-19 23:38:25 +0100 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2008-02-01 18:30:53 -0500 |
| commit | c3e94d899c864e558f938f9845ddb8c2e5d5ccd0 (patch) | |
| tree | cdc2d5007e2d8053ab1903f9e66c46dca9a9de81 /kernel/power/user.c | |
| parent | 2f8ed1c60b06b797bf79a1dc540f0bed8c9d75a0 (diff) | |
| download | linux-c3e94d899c864e558f938f9845ddb8c2e5d5ccd0.tar.gz linux-c3e94d899c864e558f938f9845ddb8c2e5d5ccd0.tar.bz2 linux-c3e94d899c864e558f938f9845ddb8c2e5d5ccd0.zip | |
Hibernation: Add PM_RESTORE_PREPARE and PM_POST_RESTORE notifiers (rev. 2)
Add PM_RESTORE_PREPARE and PM_POST_RESTORE notifiers to the PM core, to be used
in analogy with the existing PM_HIBERNATION_PREPARE and PM_POST_HIBERNATION
notifiers.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: "Rafael J. Wysocki" <rjw@sisk.pl>
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'kernel/power/user.c')
| -rw-r--r-- | kernel/power/user.c | 31 |
1 files changed, 19 insertions, 12 deletions
diff --git a/kernel/power/user.c b/kernel/power/user.c index b902a7e3bd12..f5512cb3aa86 100644 --- a/kernel/power/user.c +++ b/kernel/power/user.c @@ -67,6 +67,7 @@ atomic_t snapshot_device_available = ATOMIC_INIT(1); static int snapshot_open(struct inode *inode, struct file *filp) { struct snapshot_data *data; + int error; if (!atomic_add_unless(&snapshot_device_available, -1, 0)) return -EBUSY; @@ -87,9 +88,19 @@ static int snapshot_open(struct inode *inode, struct file *filp) data->swap = swsusp_resume_device ? swap_type_of(swsusp_resume_device, 0, NULL) : -1; data->mode = O_RDONLY; + error = pm_notifier_call_chain(PM_RESTORE_PREPARE); + if (error) + pm_notifier_call_chain(PM_POST_RESTORE); } else { data->swap = -1; data->mode = O_WRONLY; + error = pm_notifier_call_chain(PM_HIBERNATION_PREPARE); + if (error) + pm_notifier_call_chain(PM_POST_HIBERNATION); + } + if (error) { + atomic_inc(&snapshot_device_available); + return error; } data->frozen = 0; data->ready = 0; @@ -111,6 +122,8 @@ static int snapshot_release(struct inode *inode, struct file *filp) thaw_processes(); mutex_unlock(&pm_mutex); } + pm_notifier_call_chain(data->mode == O_WRONLY ? + PM_POST_HIBERNATION : PM_POST_RESTORE); atomic_inc(&snapshot_device_available); return 0; } @@ -174,18 +187,13 @@ static int snapshot_ioctl(struct inode *inode, struct file *filp, if (data->frozen) break; mutex_lock(&pm_mutex); - error = pm_notifier_call_chain(PM_HIBERNATION_PREPARE); - if (!error) { - printk("Syncing filesystems ... "); - sys_sync(); - printk("done.\n"); - - error = freeze_processes(); - if (error) - thaw_processes(); - } + printk("Syncing filesystems ... "); + sys_sync(); + printk("done.\n"); + + error = freeze_processes(); if (error) - pm_notifier_call_chain(PM_POST_HIBERNATION); + thaw_processes(); mutex_unlock(&pm_mutex); if (!error) data->frozen = 1; @@ -196,7 +204,6 @@ static int snapshot_ioctl(struct inode *inode, struct file *filp, break; mutex_lock(&pm_mutex); thaw_processes(); - pm_notifier_call_chain(PM_POST_HIBERNATION); mutex_unlock(&pm_mutex); data->frozen = 0; break; |