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cpuidle: Introduce cpuidle_driver_state_disabled() for driver quirks

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Commit 99e98d3fb1 ("cpuidle: Consolidate disabled state checks")
overlooked the fact that the imx6q and tegra20 cpuidle drivers use
the "disabled" field in struct cpuidle_state for quirks which trigger
after the initialization of cpuidle, so reading the initial value of
that field is not sufficient for those drivers.

In order to allow them to implement the quirks without using the
"disabled" field in struct cpuidle_state, introduce a new helper
function and modify them to use it.

Fixes: 99e98d3fb1 ("cpuidle: Consolidate disabled state checks")
Reported-by: Len Brown <lenb@kernel.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Rafael J. Wysocki 2019-11-18 12:11:24 +01:00
parent 85f6a17f24
commit cbda56d5fe
4 changed files with 35 additions and 3 deletions
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28
drivers/cpuidle/driver.c
View file

@ -389,3 +389,31 @@ void cpuidle_driver_unref(void)
spin_unlock(&cpuidle_driver_lock);
}
/**
* cpuidle_driver_state_disabled - Disable or enable an idle state
* @drv: cpuidle driver owning the state
* @idx: State index
* @disable: Whether or not to disable the state
*/
void cpuidle_driver_state_disabled(struct cpuidle_driver *drv, int idx,
bool disable)
{
unsigned int cpu;
mutex_lock(&cpuidle_lock);
for_each_cpu(cpu, drv->cpumask) {
struct cpuidle_device *dev = per_cpu(cpuidle_devices, cpu);
if (!dev)
continue;
if (disable)
dev->states_usage[idx].disable |= CPUIDLE_STATE_DISABLED_BY_DRIVER;
else
dev->states_usage[idx].disable &= ~CPUIDLE_STATE_DISABLED_BY_DRIVER;
}
mutex_unlock(&cpuidle_lock);
}