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authorPeter Zijlstra <peterz@infradead.org>2023-01-12 20:43:18 +0100
committerIngo Molnar <mingo@kernel.org>2023-01-13 11:03:22 +0100
commitbb7b11258561e47abbacebf76e3ce4092953dfdf (patch)
tree11a27fa2aa24b6c6efda42dd2b12c1dc4a2bd3c7 /drivers/cpuidle
parent5e26aa93391195a64871db5d96d7163f0062ca4f (diff)
downloadlwn-bb7b11258561e47abbacebf76e3ce4092953dfdf.tar.gz
lwn-bb7b11258561e47abbacebf76e3ce4092953dfdf.zip
cpuidle: Move IRQ state validation
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> Signed-off-by: Ingo Molnar <mingo@kernel.org> Tested-by: Tony Lindgren <tony@atomide.com> Tested-by: Ulf Hansson <ulf.hansson@linaro.org> Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Acked-by: Frederic Weisbecker <frederic@kernel.org> Link: https://lore.kernel.org/r/20230112195539.576412812@infradead.org
Diffstat (limited to 'drivers/cpuidle')
-rw-r--r--drivers/cpuidle/cpuidle.c10
1 files changed, 5 insertions, 5 deletions
diff --git a/drivers/cpuidle/cpuidle.c b/drivers/cpuidle/cpuidle.c
index 6eceb1988243..95c801f0b9a8 100644
--- a/drivers/cpuidle/cpuidle.c
+++ b/drivers/cpuidle/cpuidle.c
@@ -236,7 +236,11 @@ int cpuidle_enter_state(struct cpuidle_device *dev, struct cpuidle_driver *drv,
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_device *dev, struct cpuidle_driver *drv,
/* 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();