On Monday, February 13, 2017 12:43:22 PM Tony Lindgren wrote:
> From: Grygorii Strashko <grygorii.strashko@xxxxxx>
>
> 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")
> Cc: Brian Norris <briannorris@xxxxxxxxxxxx>
> Cc: Tero Kristo <t-kristo@xxxxxx>
> 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>
Applied (along with the other two wakeirq fixes).
Thanks,
Rafael
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