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Diffstat (limited to 'kernel/power')
-rw-r--r--kernel/power/disk.c138
-rw-r--r--kernel/power/main.c55
2 files changed, 118 insertions, 75 deletions
diff --git a/kernel/power/disk.c b/kernel/power/disk.c
index 4a4a206b197..e886d1332a1 100644
--- a/kernel/power/disk.c
+++ b/kernel/power/disk.c
@@ -214,7 +214,7 @@ static int create_image(int platform_mode)
return error;
device_pm_lock();
- local_irq_disable();
+
/* At this point, device_suspend() has been called, but *not*
* device_power_down(). We *must* call device_power_down() now.
* Otherwise, drivers for some devices (e.g. interrupt controllers)
@@ -225,13 +225,25 @@ static int create_image(int platform_mode)
if (error) {
printk(KERN_ERR "PM: Some devices failed to power down, "
"aborting hibernation\n");
- goto Enable_irqs;
+ goto Unlock;
}
+
+ error = platform_pre_snapshot(platform_mode);
+ if (error || hibernation_test(TEST_PLATFORM))
+ goto Platform_finish;
+
+ error = disable_nonboot_cpus();
+ if (error || hibernation_test(TEST_CPUS)
+ || hibernation_testmode(HIBERNATION_TEST))
+ goto Enable_cpus;
+
+ local_irq_disable();
+
sysdev_suspend(PMSG_FREEZE);
if (error) {
printk(KERN_ERR "PM: Some devices failed to power down, "
"aborting hibernation\n");
- goto Power_up_devices;
+ goto Enable_irqs;
}
if (hibernation_test(TEST_CORE))
@@ -247,17 +259,28 @@ static int create_image(int platform_mode)
restore_processor_state();
if (!in_suspend)
platform_leave(platform_mode);
+
Power_up:
sysdev_resume();
/* NOTE: device_power_up() is just a resume() for devices
* that suspended with irqs off ... no overall powerup.
*/
- Power_up_devices:
- device_power_up(in_suspend ?
- (error ? PMSG_RECOVER : PMSG_THAW) : PMSG_RESTORE);
+
Enable_irqs:
local_irq_enable();
+
+ Enable_cpus:
+ enable_nonboot_cpus();
+
+ Platform_finish:
+ platform_finish(platform_mode);
+
+ device_power_up(in_suspend ?
+ (error ? PMSG_RECOVER : PMSG_THAW) : PMSG_RESTORE);
+
+ Unlock:
device_pm_unlock();
+
return error;
}
@@ -291,25 +314,9 @@ int hibernation_snapshot(int platform_mode)
if (hibernation_test(TEST_DEVICES))
goto Recover_platform;
- error = platform_pre_snapshot(platform_mode);
- if (error || hibernation_test(TEST_PLATFORM))
- goto Finish;
-
- error = disable_nonboot_cpus();
- if (!error) {
- if (hibernation_test(TEST_CPUS))
- goto Enable_cpus;
-
- if (hibernation_testmode(HIBERNATION_TEST))
- goto Enable_cpus;
+ error = create_image(platform_mode);
+ /* Control returns here after successful restore */
- error = create_image(platform_mode);
- /* Control returns here after successful restore */
- }
- Enable_cpus:
- enable_nonboot_cpus();
- Finish:
- platform_finish(platform_mode);
Resume_devices:
device_resume(in_suspend ?
(error ? PMSG_RECOVER : PMSG_THAW) : PMSG_RESTORE);
@@ -331,19 +338,33 @@ int hibernation_snapshot(int platform_mode)
* kernel.
*/
-static int resume_target_kernel(void)
+static int resume_target_kernel(bool platform_mode)
{
int error;
device_pm_lock();
- local_irq_disable();
+
error = device_power_down(PMSG_QUIESCE);
if (error) {
printk(KERN_ERR "PM: Some devices failed to power down, "
"aborting resume\n");
- goto Enable_irqs;
+ goto Unlock;
}
- sysdev_suspend(PMSG_QUIESCE);
+
+ error = platform_pre_restore(platform_mode);
+ if (error)
+ goto Cleanup;
+
+ error = disable_nonboot_cpus();
+ if (error)
+ goto Enable_cpus;
+
+ local_irq_disable();
+
+ error = sysdev_suspend(PMSG_QUIESCE);
+ if (error)
+ goto Enable_irqs;
+
/* We'll ignore saved state, but this gets preempt count (etc) right */
save_processor_state();
error = restore_highmem();
@@ -366,11 +387,23 @@ static int resume_target_kernel(void)
swsusp_free();
restore_processor_state();
touch_softlockup_watchdog();
+
sysdev_resume();
- device_power_up(PMSG_RECOVER);
+
Enable_irqs:
local_irq_enable();
+
+ Enable_cpus:
+ enable_nonboot_cpus();
+
+ Cleanup:
+ platform_restore_cleanup(platform_mode);
+
+ device_power_up(PMSG_RECOVER);
+
+ Unlock:
device_pm_unlock();
+
return error;
}
@@ -390,19 +423,10 @@ int hibernation_restore(int platform_mode)
pm_prepare_console();
suspend_console();
error = device_suspend(PMSG_QUIESCE);
- if (error)
- goto Finish;
-
- error = platform_pre_restore(platform_mode);
if (!error) {
- error = disable_nonboot_cpus();
- if (!error)
- error = resume_target_kernel();
- enable_nonboot_cpus();
+ error = resume_target_kernel(platform_mode);
+ device_resume(PMSG_RECOVER);
}
- platform_restore_cleanup(platform_mode);
- device_resume(PMSG_RECOVER);
- Finish:
resume_console();
pm_restore_console();
return error;
@@ -438,38 +462,46 @@ int hibernation_platform_enter(void)
goto Resume_devices;
}
+ device_pm_lock();
+
+ error = device_power_down(PMSG_HIBERNATE);
+ if (error)
+ goto Unlock;
+
error = hibernation_ops->prepare();
if (error)
- goto Resume_devices;
+ goto Platofrm_finish;
error = disable_nonboot_cpus();
if (error)
- goto Finish;
+ goto Platofrm_finish;
- device_pm_lock();
local_irq_disable();
- error = device_power_down(PMSG_HIBERNATE);
- if (!error) {
- sysdev_suspend(PMSG_HIBERNATE);
- hibernation_ops->enter();
- /* We should never get here */
- while (1);
- }
- local_irq_enable();
- device_pm_unlock();
+ sysdev_suspend(PMSG_HIBERNATE);
+ hibernation_ops->enter();
+ /* We should never get here */
+ while (1);
/*
* We don't need to reenable the nonboot CPUs or resume consoles, since
* the system is going to be halted anyway.
*/
- Finish:
+ Platofrm_finish:
hibernation_ops->finish();
+
+ device_power_up(PMSG_RESTORE);
+
+ Unlock:
+ device_pm_unlock();
+
Resume_devices:
entering_platform_hibernation = false;
device_resume(PMSG_RESTORE);
resume_console();
+
Close:
hibernation_ops->end();
+
return error;
}
diff --git a/kernel/power/main.c b/kernel/power/main.c
index c9632f841f6..f172f41858b 100644
--- a/kernel/power/main.c
+++ b/kernel/power/main.c
@@ -287,17 +287,32 @@ void __attribute__ ((weak)) arch_suspend_enable_irqs(void)
*/
static int suspend_enter(suspend_state_t state)
{
- int error = 0;
+ int error;
device_pm_lock();
- arch_suspend_disable_irqs();
- BUG_ON(!irqs_disabled());
- if ((error = device_power_down(PMSG_SUSPEND))) {
+ error = device_power_down(PMSG_SUSPEND);
+ if (error) {
printk(KERN_ERR "PM: Some devices failed to power down\n");
goto Done;
}
+ if (suspend_ops->prepare) {
+ error = suspend_ops->prepare();
+ if (error)
+ goto Power_up_devices;
+ }
+
+ if (suspend_test(TEST_PLATFORM))
+ goto Platfrom_finish;
+
+ error = disable_nonboot_cpus();
+ if (error || suspend_test(TEST_CPUS))
+ goto Enable_cpus;
+
+ arch_suspend_disable_irqs();
+ BUG_ON(!irqs_disabled());
+
error = sysdev_suspend(PMSG_SUSPEND);
if (!error) {
if (!suspend_test(TEST_CORE))
@@ -305,11 +320,22 @@ static int suspend_enter(suspend_state_t state)
sysdev_resume();
}
- device_power_up(PMSG_RESUME);
- Done:
arch_suspend_enable_irqs();
BUG_ON(irqs_disabled());
+
+ Enable_cpus:
+ enable_nonboot_cpus();
+
+ Platfrom_finish:
+ if (suspend_ops->finish)
+ suspend_ops->finish();
+
+ Power_up_devices:
+ device_power_up(PMSG_RESUME);
+
+ Done:
device_pm_unlock();
+
return error;
}
@@ -341,23 +367,8 @@ int suspend_devices_and_enter(suspend_state_t state)
if (suspend_test(TEST_DEVICES))
goto Recover_platform;
- if (suspend_ops->prepare) {
- error = suspend_ops->prepare();
- if (error)
- goto Resume_devices;
- }
-
- if (suspend_test(TEST_PLATFORM))
- goto Finish;
-
- error = disable_nonboot_cpus();
- if (!error && !suspend_test(TEST_CPUS))
- suspend_enter(state);
+ suspend_enter(state);
- enable_nonboot_cpus();
- Finish:
- if (suspend_ops->finish)
- suspend_ops->finish();
Resume_devices:
suspend_test_start();
device_resume(PMSG_RESUME);
generated by cgit v1.2.3 (git 2.25.1) at 2024-08-14 04:58:51 +0000