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PM / wakeup: Make s2idle_lock a RAW_SPINLOCK 

The `s2idle_lock' is acquired during suspend while interrupts are
disabled even on RT. The lock is acquired for short sections only.
Make it a RAW lock which avoids "sleeping while atomic" warnings on RT.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
hifive-unleashed-5.1
Sebastian Andrzej Siewior 2018-05-25 11:46:48 +02:00 committed by Rafael J. Wysocki
parent 9c8cd6b62f
commit 62fc00a661
1 changed files with 7 additions and 7 deletions
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14
kernel/power/suspend.c
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@ -61,7 +61,7 @@ static const struct platform_s2idle_ops *s2idle_ops;
static DECLARE_SWAIT_QUEUE_HEAD(s2idle_wait_head);
enum s2idle_states __read_mostly s2idle_state;
static DEFINE_SPINLOCK(s2idle_lock);
static DEFINE_RAW_SPINLOCK(s2idle_lock);
void s2idle_set_ops(const struct platform_s2idle_ops *ops)
{
@ -79,12 +79,12 @@ static void s2idle_enter(void)
{
trace_suspend_resume(TPS("machine_suspend"), PM_SUSPEND_TO_IDLE, true);
spin_lock_irq(&s2idle_lock);
raw_spin_lock_irq(&s2idle_lock);
if (pm_wakeup_pending())
goto out;
s2idle_state = S2IDLE_STATE_ENTER;
spin_unlock_irq(&s2idle_lock);
raw_spin_unlock_irq(&s2idle_lock);
get_online_cpus();
cpuidle_resume();
@ -98,11 +98,11 @@ static void s2idle_enter(void)
cpuidle_pause();
put_online_cpus();
spin_lock_irq(&s2idle_lock);
raw_spin_lock_irq(&s2idle_lock);
out:
s2idle_state = S2IDLE_STATE_NONE;
spin_unlock_irq(&s2idle_lock);
raw_spin_unlock_irq(&s2idle_lock);
trace_suspend_resume(TPS("machine_suspend"), PM_SUSPEND_TO_IDLE, false);
}
@ -157,12 +157,12 @@ void s2idle_wake(void)
{
unsigned long flags;
spin_lock_irqsave(&s2idle_lock, flags);
raw_spin_lock_irqsave(&s2idle_lock, flags);
if (s2idle_state > S2IDLE_STATE_NONE) {
s2idle_state = S2IDLE_STATE_WAKE;
swake_up(&s2idle_wait_head);
}
spin_unlock_irqrestore(&s2idle_lock, flags);
raw_spin_unlock_irqrestore(&s2idle_lock, flags);
}
EXPORT_SYMBOL_GPL(s2idle_wake);