diff mbox series

[v3,04/51] cpuidle: Move IRQ state validation

Message ID 20230112195539.576412812@infradead.org
State Accepted
Commit bb7b11258561e47abbacebf76e3ce4092953dfdf
Headers show
Series cpuidle,rcu: Clean up the mess | expand

Commit Message

Peter Zijlstra Jan. 12, 2023, 7:43 p.m. UTC 
Make cpuidle_enter_state() consistent with the s2idle variant and
verify ->enter() always returns with interrupts disabled.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Frederic Weisbecker <frederic@kernel.org>
Tested-by: Tony Lindgren <tony@atomide.com>
Tested-by: Ulf Hansson <ulf.hansson@linaro.org>
---
 drivers/cpuidle/cpuidle.c |   10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)
diff mbox series

Patch

--- a/drivers/cpuidle/cpuidle.c
+++ b/drivers/cpuidle/cpuidle.c
@@ -236,7 +236,11 @@  int cpuidle_enter_state(struct cpuidle_d
 	stop_critical_timings();
 	if (!(target_state->flags & CPUIDLE_FLAG_RCU_IDLE))
 		ct_idle_enter();
+
 	entered_state = target_state->enter(dev, drv, index);
+	if (WARN_ONCE(!irqs_disabled(), "%ps leaked IRQ state", target_state->enter))
+		raw_local_irq_disable();
+
 	if (!(target_state->flags & CPUIDLE_FLAG_RCU_IDLE))
 		ct_idle_exit();
 	start_critical_timings();
@@ -248,12 +252,8 @@  int cpuidle_enter_state(struct cpuidle_d
 	/* The cpu is no longer idle or about to enter idle. */
 	sched_idle_set_state(NULL);
 
-	if (broadcast) {
-		if (WARN_ON_ONCE(!irqs_disabled()))
-			local_irq_disable();
-
+	if (broadcast)
 		tick_broadcast_exit();
-	}
 
 	if (!cpuidle_state_is_coupled(drv, index))
 		local_irq_enable();