On Tue, 16 Oct 2018, Mayuresh Kulkarni wrote:

> > How about instead having a mechanism whereby your usrspace driver can 
> > tell when the device does a remote wakeup?  At that point it could 
> > submit an URB via usbfs and receive the async notification.
> > 
> > Alan Stern
> 
> Unfortunately, that is not possible in our use-case. It is the composite USB 
> device that needs to detect an activity and convey it to host for taking 
> appropriate action.

Sorry, I don't understand.  Isn't that exactly the same as what I wrote 
above?

Alan Stern

> But since the activity depends on end-user, it can happen at anytime. We do 
> not want to keep the link active, just to detect this, which is not good from 
> battery life point of view.

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