On Thursday, May 14, 2015 02:15:01 PM Tony Lindgren wrote:
> * Tony Lindgren <tony@xxxxxxxxxxx> [150514 09:01]:
> > * Felipe Balbi <balbi@xxxxxx> [150513 19:09]:
> > > > +void dev_pm_enable_wake_irq(struct device *dev)
> > > > +{
> > > > + struct wake_irq *wirq = dev->power.wakeirq;
> > > > +
> > > > + if (wirq && wirq->manage_irq)
> > > > + enable_irq(wirq->irq);
> > > > +}
> > > > +EXPORT_SYMBOL_GPL(dev_pm_enable_wake_irq);
> > >
> > > you probably want to enable dev_pm_enable_wake_irq() automatically for
> > > from rpm_suspend(). According to runtime_pm documentation, wakeup should
> > > always be enabled for runtime suspended devices. I didn't really look
> > > through the whole thing yet to know if you did call it or not.
> >
> > Yes I think we can also automate that part, I've been playing with an
> > additional patch doing that for pm runtime. Been still thinking if
> > there's any need to manage that in the consomer driver, I guess not.
>
> Here's what that would roughly look and now I also remember why
> I did not include it. It adds currently extra checks also for
> devices not using dedicated wakeirqs. But basically this would
> allow leaving out the enable/disable PM runtime calls from drivers.
>
> Regards,
>
> Tony
>
> 8< -------------------
> --- a/drivers/base/power/runtime.c
> +++ b/drivers/base/power/runtime.c
> @@ -10,6 +10,7 @@
> #include <linux/sched.h>
> #include <linux/export.h>
> #include <linux/pm_runtime.h>
> +#include <linux/pm_wakeirq.h>
> #include <trace/events/rpm.h>
> #include "power.h"
>
> @@ -514,6 +515,7 @@ static int rpm_suspend(struct device *dev, int rpmflags)
>
> callback = RPM_GET_CALLBACK(dev, runtime_suspend);
>
> + dev_pm_enable_wake_irq(dev);
> retval = rpm_callback(callback, dev);
> if (retval)
> goto fail;
> @@ -552,6 +554,7 @@ static int rpm_suspend(struct device *dev, int rpmflags)
> return retval;
>
> fail:
> + dev_pm_disable_wake_irq(dev);
> __update_runtime_status(dev, RPM_ACTIVE);
> dev->power.deferred_resume = false;
> wake_up_all(&dev->power.wait_queue);
> @@ -734,10 +737,12 @@ static int rpm_resume(struct device *dev, int rpmflags)
>
> callback = RPM_GET_CALLBACK(dev, runtime_resume);
>
> + dev_pm_disable_wake_irq(dev);
> retval = rpm_callback(callback, dev);
> if (retval) {
> __update_runtime_status(dev, RPM_SUSPENDED);
> pm_runtime_cancel_pending(dev);
> + dev_pm_enable_wake_irq(dev);
> } else {
> no_callback:
> __update_runtime_status(dev, RPM_ACTIVE);
> @@ -1427,6 +1432,7 @@ int pm_runtime_force_suspend(struct device *dev)
> goto err;
> }
>
> + dev_pm_enable_wake_irq(dev);
Why here? This is for system suspend.
> ret = callback(dev);
> if (ret)
> goto err;
> @@ -1434,6 +1440,7 @@ int pm_runtime_force_suspend(struct device *dev)
> pm_runtime_set_suspended(dev);
> return 0;
> err:
> + dev_pm_disable_wake_irq(dev);
> pm_runtime_enable(dev);
> return ret;
> }
> @@ -1463,6 +1470,7 @@ int pm_runtime_force_resume(struct device *dev)
> goto out;
> }
>
> + dev_pm_disable_wake_irq(dev);
This one too.
> ret = callback(dev);
> if (ret)
> goto out;
> @@ -1470,6 +1478,7 @@ int pm_runtime_force_resume(struct device *dev)
> pm_runtime_set_active(dev);
> pm_runtime_mark_last_busy(dev);
> out:
> + dev_pm_enable_wake_irq(dev);
> pm_runtime_enable(dev);
> return ret;
> }
> --
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--
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.
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