From: Oliver Neukum <oneukum@suse.de>
To: Alan Stern <stern@rowland.harvard.edu>
Cc: Jiri Slaby <jslaby@suse.cz>, Dmitry Torokhov <dtor@mail.ru>,
pingc@wacom.com, linux-pm <linux-pm@lists.linux-foundation.org>,
Linux kernel mailing list <linux-kernel@vger.kernel.org>,
linux-input@vger.kernel.org
Subject: Re: [linux-pm] wacom + runtime PM = AA deadlock
Date: Tue, 14 Sep 2010 17:30:38 +0200 [thread overview]
Message-ID: <201009141730.38215.oneukum@suse.de> (raw)
In-Reply-To: <Pine.LNX.4.44L0.1009141119340.1648-100000@iolanthe.rowland.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
next prev parent reply other threads:[~2010-09-14 15:30 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-09-13 12:24 wacom + runtime PM = AA deadlock Jiri Slaby
2010-09-13 14:25 ` [linux-pm] " Alan Stern
2010-09-13 14:56 ` Oliver Neukum
2010-09-13 15:17 ` [linux-pm] " Alan Stern
2010-09-13 19:05 ` Oliver Neukum
2010-09-13 20:02 ` Alan Stern
2010-09-13 20:28 ` Dmitry Torokhov
2010-09-14 8:13 ` Oliver Neukum
2010-09-14 14:01 ` Alan Stern
2010-09-14 14:03 ` Oliver Neukum
2010-09-14 15:23 ` Alan Stern
2010-09-14 15:30 ` Oliver Neukum [this message]
2010-09-14 16:05 ` Alan Stern
2010-09-13 17:10 ` Dmitry Torokhov
2010-09-13 19:20 ` [linux-pm] " Oliver Neukum
2010-09-14 0:52 ` Dmitry Torokhov
2010-09-14 6:07 ` Oliver Neukum
2010-10-04 16:13 ` Dmitry Torokhov
2010-10-04 18:33 ` Oliver Neukum
2010-10-04 18:38 ` Dmitry Torokhov
2010-10-04 19:24 ` Oliver Neukum
2010-10-05 5:41 ` Dmitry Torokhov
2010-10-05 5:54 ` Oliver Neukum
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