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Diffstat (limited to 'kernel/power/disk.c')
-rw-r--r--kernel/power/disk.c56
1 files changed, 33 insertions, 23 deletions
diff --git a/kernel/power/disk.c b/kernel/power/disk.c
index 02b6764034d..664eb0469b6 100644
--- a/kernel/power/disk.c
+++ b/kernel/power/disk.c
@@ -16,6 +16,8 @@
#include <linux/device.h>
#include <linux/delay.h>
#include <linux/fs.h>
+#include <linux/mount.h>
+
#include "power.h"
@@ -57,16 +59,13 @@ static void power_down(suspend_disk_method_t mode)
error = pm_ops->enter(PM_SUSPEND_DISK);
break;
case PM_DISK_SHUTDOWN:
- printk("Powering off system\n");
- device_shutdown();
- machine_power_off();
+ kernel_power_off();
break;
case PM_DISK_REBOOT:
- device_shutdown();
- machine_restart(NULL);
+ kernel_restart(NULL);
break;
}
- machine_halt();
+ kernel_halt();
/* Valid image is on the disk, if we continue we risk serious data corruption
after resume. */
printk(KERN_CRIT "Please power me down manually\n");
@@ -117,8 +116,8 @@ static void finish(void)
{
device_resume();
platform_finish();
- enable_nonboot_cpus();
thaw_processes();
+ enable_nonboot_cpus();
pm_restore_console();
}
@@ -131,28 +130,35 @@ static int prepare_processes(void)
sys_sync();
+ disable_nonboot_cpus();
+
if (freeze_processes()) {
error = -EBUSY;
- return error;
+ goto thaw;
}
if (pm_disk_mode == PM_DISK_PLATFORM) {
if (pm_ops && pm_ops->prepare) {
if ((error = pm_ops->prepare(PM_SUSPEND_DISK)))
- return error;
+ goto thaw;
}
}
/* Free memory before shutting down devices. */
free_some_memory();
-
return 0;
+thaw:
+ thaw_processes();
+ enable_nonboot_cpus();
+ pm_restore_console();
+ return error;
}
static void unprepare_processes(void)
{
- enable_nonboot_cpus();
+ platform_finish();
thaw_processes();
+ enable_nonboot_cpus();
pm_restore_console();
}
@@ -160,15 +166,9 @@ static int prepare_devices(void)
{
int error;
- disable_nonboot_cpus();
- if ((error = device_suspend(PMSG_FREEZE))) {
+ if ((error = device_suspend(PMSG_FREEZE)))
printk("Some devices failed to suspend\n");
- platform_finish();
- enable_nonboot_cpus();
- return error;
- }
-
- return 0;
+ return error;
}
/**
@@ -185,9 +185,9 @@ int pm_suspend_disk(void)
int error;
error = prepare_processes();
- if (!error) {
- error = prepare_devices();
- }
+ if (error)
+ return error;
+ error = prepare_devices();
if (error) {
unprepare_processes();
@@ -233,6 +233,16 @@ static int software_resume(void)
{
int error;
+ if (!swsusp_resume_device) {
+ if (!strlen(resume_file))
+ return -ENOENT;
+ swsusp_resume_device = name_to_dev_t(resume_file);
+ pr_debug("swsusp: Resume From Partition %s\n", resume_file);
+ } else {
+ pr_debug("swsusp: Resume From Partition %d:%d\n",
+ MAJOR(swsusp_resume_device), MINOR(swsusp_resume_device));
+ }
+
if (noresume) {
/**
* FIXME: If noresume is specified, we need to find the partition
@@ -250,7 +260,7 @@ static int software_resume(void)
if ((error = prepare_processes())) {
swsusp_close();
- goto Cleanup;
+ goto Done;
}
pr_debug("PM: Reading swsusp image.\n");