From 08605acc7e3b7974e309d73ddf39ee9464d95e51 Mon Sep 17 00:00:00 2001
From: Zhang Rui <rui.zhang@intel.com>
Date: Wed, 27 Mar 2013 03:36:10 +0000
Subject: PM / sleep: add TEST_PLATFORM support for freeze state
Invoke freeze_enter() after suspend_test(TEST_PLATFORM) being invoked.
So when setting /sys/power/pm_test to "platform", it can be used to
check if freeze state is working well after all devices are suspended
and before processors are blocked,
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
kernel/power/suspend.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
(limited to 'kernel')
diff --git a/kernel/power/suspend.c b/kernel/power/suspend.c
index d4feda084a3a..5eb30aab9b99 100644
--- a/kernel/power/suspend.c
+++ b/kernel/power/suspend.c
@@ -184,6 +184,9 @@ static int suspend_enter(suspend_state_t state, bool *wakeup)
goto Platform_wake;
}
+ if (suspend_test(TEST_PLATFORM))
+ goto Platform_wake;
+
/*
* PM_SUSPEND_FREEZE equals
* frozen processes + suspended devices + idle processors.
@@ -195,9 +198,6 @@ static int suspend_enter(suspend_state_t state, bool *wakeup)
goto Platform_wake;
}
- if (suspend_test(TEST_PLATFORM))
- goto Platform_wake;
-
error = disable_nonboot_cpus();
if (error || suspend_test(TEST_CPUS))
goto Enable_cpus;
--
cgit v1.2.3-70-g09d2
From c26b78a2d826a89cd689527493a2bea22af46133 Mon Sep 17 00:00:00 2001
From: Zhang Rui <rui.zhang@intel.com>
Date: Wed, 27 Mar 2013 03:36:11 +0000
Subject: PM / sleep: invalidate TEST_CPUS and TEST_CORE support for freeze
state
freeze state is a software suspend state that does not run into
low-level platform callbacks which may interact with BIOS.
And freeze state does not need to disable the processors.
But the current pm_test support misleads users because users
can enter freeze state with pm_test set to TEST_CPUS/TEST_CORE,
while this pm_test setting never takes actions.
So, invalidate TEST_CPUS/TEST_CORE for freeze state in this patch.
Then users will get an error instead, when trying to
enter freeze state with pm_test mode set to TEST_CPUS/TEST_CORE.
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
kernel/power/suspend.c | 16 ++++++++++++++--
1 file changed, 14 insertions(+), 2 deletions(-)
(limited to 'kernel')
diff --git a/kernel/power/suspend.c b/kernel/power/suspend.c
index 5eb30aab9b99..bef86d121eb2 100644
--- a/kernel/power/suspend.c
+++ b/kernel/power/suspend.c
@@ -76,8 +76,20 @@ EXPORT_SYMBOL_GPL(suspend_set_ops);
bool valid_state(suspend_state_t state)
{
- if (state == PM_SUSPEND_FREEZE)
- return true;
+ if (state == PM_SUSPEND_FREEZE) {
+#ifdef CONFIG_PM_DEBUG
+ if (pm_test_level != TEST_NONE &&
+ pm_test_level != TEST_FREEZER &&
+ pm_test_level != TEST_DEVICES &&
+ pm_test_level != TEST_PLATFORM) {
+ printk(KERN_WARNING "Unsupported pm_test mode for "
+ "freeze state, please choose "
+ "none/freezer/devices/platform.\n");
+ return false;
+ }
+#endif
+ return true;
+ }
/*
* PM_SUSPEND_STANDBY and PM_SUSPEND_MEMORY states need lowlevel
* support and need to be valid to the lowlevel
--
cgit v1.2.3-70-g09d2