linux-kernel - Re: [PATCH] HID: usbhid: get/put around clearing needs_remote

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Date:	Sat, 22 Nov 2014 11:02:58 -0500 (EST)
From:	Alan Stern <stern@...land.harvard.edu>
To:	Benson Leung <bleung@...omium.org>
cc:	johan@...nel.org, Jiri Kosina <jkosina@...e.cz>,
	<linux-usb@...r.kernel.org>,
	"linux-input@...r.kernel.org" <linux-input@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Sameer Nanda <snanda@...omium.org>
Subject: Re: [PATCH] HID: usbhid: get/put around clearing needs_remote_wakeup

On Sat, 22 Nov 2014, Alan Stern wrote:

> There is no USB wrapper for pm_runtime_idle calls, but one could be
> added.  Still, in the meantime can you check to see what happens if you
> add
> 
> 	pm_runtime_idle(&usbhid->intf->dev);
> 
> in usbhid_close() just after needs_remote_wakeup is set to 0?  You can 
> do the same thing in usbhid_stop() if you want.

Come to think of it, we probably need

	pm_runtime_idle(usbhid->intf->dev->parent);

in addition to the function call above.  When a USB wrapper is written,
it can take care of these details.

Alan Stern

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