This is a note to let you know that I've just added the patch titled
PM: sleep: wakeirq: fix wake irq warning in system suspend
to the 4.19-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
pm-sleep-wakeirq-fix-wake-irq-warning-in-system-susp.patch
and it can be found in the queue-4.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit e1ff83dbd2ba5445062363fbe0319ff4a382ff23
Author: Qingliang Li <qingliang.li@xxxxxxxxxxxx>
Date: Fri Mar 1 17:26:57 2024 +0800
PM: sleep: wakeirq: fix wake irq warning in system suspend
[ Upstream commit e7a7681c859643f3f2476b2a28a494877fd89442 ]
When driver uses pm_runtime_force_suspend() as the system suspend callback
function and registers the wake irq with reverse enable ordering, the wake
irq will be re-enabled when entering system suspend, triggering an
'Unbalanced enable for IRQ xxx' warning. In this scenario, the call
sequence during system suspend is as follows:
suspend_devices_and_enter()
-> dpm_suspend_start()
-> dpm_run_callback()
-> pm_runtime_force_suspend()
-> dev_pm_enable_wake_irq_check()
-> dev_pm_enable_wake_irq_complete()
-> suspend_enter()
-> dpm_suspend_noirq()
-> device_wakeup_arm_wake_irqs()
-> dev_pm_arm_wake_irq()
To fix this issue, complete the setting of WAKE_IRQ_DEDICATED_ENABLED flag
in dev_pm_enable_wake_irq_complete() to avoid redundant irq enablement.
Fixes: 8527beb12087 ("PM: sleep: wakeirq: fix wake irq arming")
Reviewed-by: Dhruva Gole <d-gole@xxxxxx>
Signed-off-by: Qingliang Li <qingliang.li@xxxxxxxxxxxx>
Reviewed-by: Johan Hovold <johan+linaro@xxxxxxxxxx>
Cc: 5.16+ <stable@xxxxxxxxxxxxxxx> # 5.16+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/base/power/wakeirq.c b/drivers/base/power/wakeirq.c
index e7ba514999163..bc3637b45cbf7 100644
--- a/drivers/base/power/wakeirq.c
+++ b/drivers/base/power/wakeirq.c
@@ -376,8 +376,10 @@ void dev_pm_enable_wake_irq_complete(struct device *dev)
return;
if (wirq->status & WAKE_IRQ_DEDICATED_MANAGED &&
- wirq->status & WAKE_IRQ_DEDICATED_REVERSE)
+ wirq->status & WAKE_IRQ_DEDICATED_REVERSE) {
enable_irq(wirq->irq);
+ wirq->status |= WAKE_IRQ_DEDICATED_ENABLED;
+ }
}
/**
