On Sat, 24 Jul 2010, Raj Kumar wrote:
> Hi Alan,
>
>
>
> Please see my following points:
>
>
>
> Suppose when device is idle, it says to run time power management framework i am idle
>
> and run time power management asks the device's bus (if bus is being used), and
>
> probably the case is if the device does not want to get suspended because of the starting
>
> of the activities immediately , it will return the error to platform bus and platform bus returns this error
>
> to run time power management framework and run time power management will make
>
> the device status active. In the code of
>
>
>
> int __pm_runtime_suspend(arguments...)
>
> {
>
>
>
>
> if (retval) {
> dev->power.runtime_status = RPM_ACTIVE;
> pm_runtime_cancel_pending(dev);
>
> if (retval == -EAGAIN || retval == -EBUSY) {
> notify = true;
> dev->power.runtime_error = 0;
> }
> } else {
>
>
>
>
> }
>
>
>
> So if the retval is -EAGAIN and -EBUSY, so it means it will again try to make it idle but if the device is
>
> already doing activities , since it is started doing activities then in that case is this error code
>
> ECANCELED is appropriate?
No. -EBUSY is more appropriate, since the device is busy.
Alan Stern
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