6.6-stable review patch. If anyone has any objections, please let me know.
------------------
From: Borislav Petkov (AMD) <bp@xxxxxxxxx>
[ Upstream commit c8f5caec3df84a02b937d6d9cda1f7ffa8dc443f ]
The cpuidle drivers' ->enter() methods are supposed to be IRQ invariant:
5e26aa933911 ("cpuidle/poll: Ensure IRQs stay disabled after cpuidle_state::enter() calls")
bb7b11258561 ("cpuidle: Move IRQ state validation")
Do that in the haltpoll driver too.
Fixes: 5e26aa933911 ("cpuidle/poll: Ensure IRQs stay disabled after cpuidle_state::enter() calls")
Closes: https://bugzilla.kernel.org/show_bug.cgi?id=218245
Reported-by: <forza@xxxxxxxxxxxx>
Tested-by: <forza@xxxxxxxxxxxx>
Signed-off-by: Borislav Petkov (AMD) <bp@xxxxxxxxx>
[ rjw: Changelog edits ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/cpuidle/cpuidle-haltpoll.c | 9 ++++-----
1 file changed, 4 insertions(+), 5 deletions(-)
diff --git a/drivers/cpuidle/cpuidle-haltpoll.c b/drivers/cpuidle/cpuidle-haltpoll.c
index e66df22f9695..d8515d5c0853 100644
--- a/drivers/cpuidle/cpuidle-haltpoll.c
+++ b/drivers/cpuidle/cpuidle-haltpoll.c
@@ -25,13 +25,12 @@ MODULE_PARM_DESC(force, "Load unconditionally");
static struct cpuidle_device __percpu *haltpoll_cpuidle_devices;
static enum cpuhp_state haltpoll_hp_state;
-static int default_enter_idle(struct cpuidle_device *dev,
- struct cpuidle_driver *drv, int index)
+static __cpuidle int default_enter_idle(struct cpuidle_device *dev,
+ struct cpuidle_driver *drv, int index)
{
- if (current_clr_polling_and_test()) {
- local_irq_enable();
+ if (current_clr_polling_and_test())
return index;
- }
+
arch_cpu_idle();
return index;
}
--
2.43.0
