xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Hibernation: Add PM_RESTORE_PREPARE and PM_POST_RESTORE notifiers (rev. 2)

Browse Source 
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>
This commit is contained in:
Alan Stern
2007-11-19 23:38:25 +01:00
committed by Len Brown
parent 2f8ed1c60b
commit c3e94d899c
4 changed files with 33 additions and 11 deletions
Download Patch File Download Diff File Expand all files Collapse all files

29
kernel/power/user.c
View File

@@ -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");
printk("Syncing filesystems ... ");
sys_sync();
printk("done.\n");
error = freeze_processes();
if (error)
thaw_processes();
}
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;