This is a note to let you know that I've just added the patch titled
PM / wakeirq: report a wakeup_event on dedicated wekup irq
to the 4.4-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-wakeirq-report-a-wakeup_event-on-dedicated-wekup-irq.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From foo@baz Mon Nov 6 10:22:56 CET 2017
From: Grygorii Strashko <grygorii.strashko@xxxxxx>
Date: Sat, 7 Oct 2017 22:37:43 +0000
Subject: PM / wakeirq: report a wakeup_event on dedicated wekup irq
From: Grygorii Strashko <grygorii.strashko@xxxxxx>
[ Upstream commit 09bb6e93956ae5175b96905b723ec879c3ca0765 ]
There are two reasons for reporting wakeup event when dedicated wakeup
IRQ is triggered:
- wakeup events accounting, so proper statistical data will be
displayed in sysfs and debugfs;
- there are small window when System is entering suspend during which
dedicated wakeup IRQ can be lost:
dpm_suspend_noirq()
|- device_wakeup_arm_wake_irqs()
|- dev_pm_arm_wake_irq(X)
|- IRQ is enabled and marked as wakeup source
[1]...
|- suspend_device_irqs()
|- suspend_device_irq(X)
|- irqd_set(X, IRQD_WAKEUP_ARMED);
|- wakup IRQ armed
The wakeup IRQ can be lost if it's triggered at point [1]
and not armed yet.
Hence, fix above cases by adding simple pm_wakeup_event() call in
handle_threaded_wake_irq().
Fixes: 4990d4fe327b (PM / Wakeirq: Add automated device wake IRQ handling)
Signed-off-by: Grygorii Strashko <grygorii.strashko@xxxxxx>
Tested-by: Keerthy <j-keerthy@xxxxxx>
[ tony@xxxxxxxxxxx: added missing return to avoid warnings ]
Tested-by: Tony Lindgren <tony@xxxxxxxxxxx>
Signed-off-by: Tony Lindgren <tony@xxxxxxxxxxx>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/base/power/wakeirq.c | 7 +++++++
1 file changed, 7 insertions(+)
--- a/drivers/base/power/wakeirq.c
+++ b/drivers/base/power/wakeirq.c
@@ -141,6 +141,13 @@ static irqreturn_t handle_threaded_wake_
struct wake_irq *wirq = _wirq;
int res;
+ /* Maybe abort suspend? */
+ if (irqd_is_wakeup_set(irq_get_irq_data(irq))) {
+ pm_wakeup_event(wirq->dev, 0);
+
+ return IRQ_HANDLED;
+ }
+
/* We don't want RPM_ASYNC or RPM_NOWAIT here */
res = pm_runtime_resume(wirq->dev);
if (res < 0)
Patches currently in stable-queue which might be from grygorii.strashko@xxxxxx are
queue-4.4/pm-wakeirq-report-a-wakeup_event-on-dedicated-wekup-irq.patch