[PATCH] PM / wakeirq: report wakeup events in dedicated wake-IRQs
STALE3598d
From: Brian Norris <briannorris@chromium.org>
Date: 2016-11-10 18:07:43
Also in:
lkml
Subsystem:
driver core, kobjects, debugfs and sysfs, hibernation (aka software suspend, aka swsusp), power management core, suspend to ram, the rest · Maintainers:
Greg Kroah-Hartman, "Rafael J. Wysocki", Danilo Krummrich, Linus Torvalds
It's important that user space can figure out what device woke the system from suspend -- e.g., for debugging, or for implementing conditional wake behavior. Dedicated wakeup IRQs don't currently do that. Let's report the event (pm_wakeup_event()) and also allow drivers to synchronize with these events in their resume path (hence, disable_irq() instead of disable_irq_nosync()). Signed-off-by: Brian Norris <briannorris@chromium.org> --- drivers/base/power/wakeirq.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/base/power/wakeirq.c b/drivers/base/power/wakeirq.c
index 0d77cd6fd8d1..c35b2db1194c 100644
--- a/drivers/base/power/wakeirq.c
+++ b/drivers/base/power/wakeirq.c@@ -139,6 +139,8 @@ static irqreturn_t handle_threaded_wake_irq(int irq, void *_wirq) struct wake_irq *wirq = _wirq; int res; + pm_wakeup_event(wirq->dev, 0); + /* We don't want RPM_ASYNC or RPM_NOWAIT here */ res = pm_runtime_resume(wirq->dev); if (res < 0)
@@ -240,7 +242,7 @@ void dev_pm_disable_wake_irq(struct device *dev) struct wake_irq *wirq = dev->power.wakeirq; if (wirq && wirq->dedicated_irq) - disable_irq_nosync(wirq->irq); + disable_irq(wirq->irq); } EXPORT_SYMBOL_GPL(dev_pm_disable_wake_irq);
--
2.8.0.rc3.226.g39d4020