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authorZhang Rui <rui.zhang@intel.com>2013-03-27 03:36:11 +0000
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2013-04-05 14:18:25 +0200
commitc26b78a2d826a89cd689527493a2bea22af46133 (patch)
tree313eef7849770d228a76b28abad16c55def1ea26 /kernel/power
parent08605acc7e3b7974e309d73ddf39ee9464d95e51 (diff)
downloadlinux-c26b78a2d826a89cd689527493a2bea22af46133.tar.bz2
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>
Diffstat (limited to 'kernel/power')
-rw-r--r--kernel/power/suspend.c16
1 files changed, 14 insertions, 2 deletions
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