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Message-ID: <d120d5000511040727x7d433e08jeb8937cb2e48249a@mail.gmail.com>
Date: Fri, 4 Nov 2005 10:27:26 -0500
From: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Reply-To: dtor_core@ameritech.net
To: Pierre Ossman <drzeus-list@drzeus.cx>
Subject: Re: [Fwd: [PATCH] [PNP][RFC] Suspend support for PNP bus.]
Cc: Andrew Morton <akpm@osdl.org>, LKML <linux-kernel@vger.kernel.org>,
       Adam Belay <ambx1@neo.rr.com>
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On 11/4/05, Pierre Ossman <drzeus-list@drzeus.cx> wrote:
> Dmitry Torokhov wrote:
> >
> > Hmm, would'nt presence of such device stop suspend process? It will
> > cause pnp_bus_resume to fail too. Perhaps returning 0 in this case is
> > better.
> >
> >
>
> The problem is that this code is also visited from pnp_activate_dev() &
> co where this return value is needed. For pnp_stop_dev() the same check
> (pnp_can_disable()) is performed in the suspend routine to avoid that
> particular problem. For resume my assumption was that a device that
> doesn't support activation will not have a driver attached to it.
> Perhaps this is wrong?
>

i8042 registers drivers for keyboard and AUX ports to gather
information whether the ports are present and what IRQ and IO ports
shoudl be used to access them. And I have seen a few boxes that do not
alloe [de]activate these devices.

--
Dmitry
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