Commit c26b78a2 authored Mar 27, 2013 by Zhang Rui Committed by Rafael J. Wysocki Apr 05, 2013

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>

parent 08605acc

kernel/power/suspend.c

+14 −2

Original line number	Diff line number	Diff line
		@@ -76,8 +76,20 @@ EXPORT_SYMBOL_GPL(suspend_set_ops);

		bool valid_state(suspend_state_t state)
		{
		if (state == PM_SUSPEND_FREEZE)
		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