From mboxrd@z Thu Jan 1 00:00:00 1970 From: Oliver Neukum Subject: Re: [linux-pm] wacom + runtime PM = AA deadlock Date: Tue, 14 Sep 2010 17:30:38 +0200 Message-ID: <201009141730.38215.oneukum@suse.de> References: Mime-Version: 1.0 Content-Type: Text/Plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Return-path: Received: from cantor.suse.de ([195.135.220.2]:42156 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751327Ab0INPaH (ORCPT ); Tue, 14 Sep 2010 11:30:07 -0400 In-Reply-To: Sender: linux-input-owner@vger.kernel.org List-Id: linux-input@vger.kernel.org To: Alan Stern Cc: Jiri Slaby , Dmitry Torokhov , pingc@wacom.com, linux-pm , Linux kernel mailing list , linux-input@vger.kernel.org Am Dienstag, 14. September 2010, 17:23:15 schrieb Alan Stern: > On Tue, 14 Sep 2010, Oliver Neukum wrote: > > > > > Should I have used usb_autopm_get_interface_no_resume()? > > > > > > That actually would work. It's a good idea. The only drawback (not a > > > big one) is that if the device _was_ suspended with remote wakeup > > > enabled, doing this wouldn't turn off remote wakeup. I think that > > > doesn't matter. > > > > I am afraid it does matter as devices whose remote wakeup is enabled > > may draw more power. > > I doubt it, or at least, not very much more. They are still limited by > the USB spec as to the total amount of current they can draw while > suspended. 7.2.3 Sources of remote wakeup may draw 2.5mA when suspended as opposed to 0.5 mA Regards Oliver