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Last-minute power management fix for 5.19

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Make some false positive RCU splats resulting from a recent intel_idle
 driver change go away (Waiman Long).
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Merge tag 'pm-5.19-rc9' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull power management fix from Rafael Wysocki:
 "Make some false positive RCU splats resulting from a recent intel_idle
  driver change go away (Waiman Long)"

* tag 'pm-5.19-rc9' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  intel_idle: Fix false positive RCU splats due to incorrect hardirqs state
This commit is contained in:
Linus Torvalds 2022-07-29 10:57:26 -07:00
commit 506e6dfb0f
1 changed files with 7 additions and 1 deletions
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8
drivers/idle/intel_idle.c
View File

@ -162,7 +162,13 @@ static __cpuidle int intel_idle_irq(struct cpuidle_device *dev,
raw_local_irq_enable();
ret = __intel_idle(dev, drv, index);
raw_local_irq_disable();
/*
* The lockdep hardirqs state may be changed to 'on' with timer
* tick interrupt followed by __do_softirq(). Use local_irq_disable()
* to keep the hardirqs state correct.
*/
local_irq_disable();
return ret;
}