linux-kernel - Re: Async suspend-resume patch w/ completions (was: Re: Async suspend-resume patch w/ rwsems)

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Message-ID: <Pine.LNX.4.44L0.0912201434340.27137-100000@netrider.rowland.org>
Date:	Sun, 20 Dec 2009 14:38:23 -0500 (EST)
From:	Alan Stern <stern@...land.harvard.edu>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Zhang Rui <rui.zhang@...el.com>,
	LKML <linux-kernel@...r.kernel.org>,
	ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
	pm list <linux-pm@...ts.linux-foundation.org>
Subject: Re: Async suspend-resume patch w/ completions (was: Re: Async
 suspend-resume patch w/ rwsems)

On Sun, 20 Dec 2009, Rafael J. Wysocki wrote:

> BTW, what's the right place to call device_enable_async_suspend() for USB
> devices?

For USB devices, it's in drivers/usb/core/hub.c:usb_new_device() 
anywhere before the call to usb_device_add().

For USB interfaces, it's in 
drivers/usb/core/message.c:usb_set_configuration() before the call to 
device_add().

For USB endpoints, it's in 
drivers/usb/core/endpoint.c:usb_create_ep_devs() before the call to 
device_register().

However you won't need to do it for interfaces and endpoints if you 
automatically treat as async any device without suspend/resume 
callbacks.

Alan Stern

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