#include <linux/swapops.h>
#include <linux/pm.h>
#include <linux/fs.h>
+#include <linux/console.h>
+#include <linux/cpu.h>
#include <asm/uaccess.h>
if (data->frozen)
break;
down(&pm_sem);
- pm_prepare_console();
- disable_nonboot_cpus();
- if (freeze_processes()) {
- thaw_processes();
- enable_nonboot_cpus();
- pm_restore_console();
- error = -EBUSY;
+ error = disable_nonboot_cpus();
+ if (!error) {
+ error = freeze_processes();
+ if (error) {
+ thaw_processes();
+ enable_nonboot_cpus();
+ error = -EBUSY;
+ }
}
up(&pm_sem);
if (!error)
down(&pm_sem);
thaw_processes();
enable_nonboot_cpus();
- pm_restore_console();
up(&pm_sem);
data->frozen = 0;
break;
/* Free memory before shutting down devices. */
error = swsusp_shrink_memory();
if (!error) {
+ suspend_console();
error = device_suspend(PMSG_FREEZE);
if (!error) {
in_suspend = 1;
error = swsusp_suspend();
device_resume();
}
+ resume_console();
}
up(&pm_sem);
if (!error)
error = -EPERM;
break;
}
+ snapshot_free_unused_memory(&data->handle);
down(&pm_sem);
pm_prepare_console();
- error = device_suspend(PMSG_FREEZE);
+ suspend_console();
+ error = device_suspend(PMSG_PRETHAW);
if (!error) {
error = swsusp_resume();
device_resume();
}
+ resume_console();
pm_restore_console();
up(&pm_sem);
break;
}
break;
+ case SNAPSHOT_S2RAM:
+ if (!data->frozen) {
+ error = -EPERM;
+ break;
+ }
+
+ if (down_trylock(&pm_sem)) {
+ error = -EBUSY;
+ break;
+ }
+
+ if (pm_ops->prepare) {
+ error = pm_ops->prepare(PM_SUSPEND_MEM);
+ if (error)
+ goto OutS3;
+ }
+
+ /* Put devices to sleep */
+ suspend_console();
+ error = device_suspend(PMSG_SUSPEND);
+ if (error) {
+ printk(KERN_ERR "Failed to suspend some devices.\n");
+ } else {
+ /* Enter S3, system is already frozen */
+ suspend_enter(PM_SUSPEND_MEM);
+
+ /* Wake up devices */
+ device_resume();
+ }
+ resume_console();
+ if (pm_ops->finish)
+ pm_ops->finish(PM_SUSPEND_MEM);
+
+OutS3:
+ up(&pm_sem);
+ break;
+
default:
error = -ENOTTY;