diff options
| author |   Grygorii Strashko <grygorii.strashko@ti.com> | 2017-02-13 12:43:22 -0800 |
|---|---|---|
| committer |   Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2017-02-13 22:29:30 +0100 |
| commit | 09bb6e93956ae5175b96905b723ec879c3ca0765 (patch) | |
| tree | 9d4fdd27d965f578b88dbc5691057b42966e2185 /drivers/base | |
| parent | PM / wakeirq: Fix spurious wake-up events for dedicated wakeirqs (diff) | |
| download | linux-dev-09bb6e93956ae5175b96905b723ec879c3ca0765.tar.xz linux-dev-09bb6e93956ae5175b96905b723ec879c3ca0765.zip | |
PM / wakeirq: report a wakeup_event on dedicated wekup irq
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@ti.com>
Tested-by: Keerthy <j-keerthy@ti.com>
[ tony@atomide.com: added missing return to avoid warnings ]
Tested-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/base')
| -rw-r--r-- | drivers/base/power/wakeirq.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/base/power/wakeirq.c b/drivers/base/power/wakeirq.c index 06f103ce9d82..ae0429827f31 100644 --- a/drivers/base/power/wakeirq.c +++ b/drivers/base/power/wakeirq.c @@ -141,6 +141,13 @@ static irqreturn_t handle_threaded_wake_irq(int irq, void *_wirq) 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) |