From 2d5ed61ce9820a1fe7b076cc45c169524d767746 Mon Sep 17 00:00:00 2001 From: Ravi Chandra Sadineni Date: Fri, 1 Jun 2018 19:32:15 -0700 Subject: PM / wakeup: Export wakeup_count instead of event_count via sysfs Currently we export event_count instead of wakeup_count via the per-device wakeup_count sysfs attribute. Change it to wakeup_count to make it more meaningful. wakeup_count increments only when events_check_enabled is set, that is whenever writes the current wakeup count to /sys/power/wakeup_count. Also events_check_enabled is cleared on every resume. User space is expected to write to this just before suspend. This way pm_wakeup_event(), when called from IRQs handles, will increment wakeup_count only if we are in system-wide suspend-resume cycle and should give a fair approximation of how many times a device may have triggered a wakeup from system suspend. event_count on the other hand will increment every time pm_wakeup_event() is called irrespective of whether we are in a suspend-resume cycle and some drivers call it on every interrupt which makes it less useful for system wakeup tracking. Signed-off-by: Ravi Chandra Sadineni Acked-by: Pavel Machek [ rjw: Subject & changelog ] Signed-off-by: Rafael J. Wysocki --- drivers/base/power/sysfs.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers') diff --git a/drivers/base/power/sysfs.c b/drivers/base/power/sysfs.c index 0f651efc58a1..d713738ce796 100644 --- a/drivers/base/power/sysfs.c +++ b/drivers/base/power/sysfs.c @@ -353,7 +353,7 @@ static ssize_t wakeup_count_show(struct device *dev, spin_lock_irq(&dev->power.lock); if (dev->power.wakeup) { - count = dev->power.wakeup->event_count; + count = dev->power.wakeup->wakeup_count; enabled = true; } spin_unlock_irq(&dev->power.lock); -- cgit v1.2.3