linux-kernel - Re: [alsa-devel] PNP_DRIVER_RES_DISABLE breaks swsusp at least with snd

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Message-Id: <200801121746.57177.linux@rainbow-software.org>
Date:	Sat, 12 Jan 2008 17:46:53 +0100
From:	Ondrej Zary <linux@...nbow-software.org>
To:	Pierre Ossman <drzeus@...eus.cx>
Cc:	Rene Herman <rene.herman@...access.nl>,
	Pavel Machek <pavel@...e.cz>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	Jaroslav Kysela <perex@...ex.cz>,
	ALSA development <alsa-devel@...a-project.org>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	Bjorn Helgaas <bjorn.helgaas@...com>,
	Andrew Morton <akpm@...l.org>, Takashi Iwai <tiwai@...e.de>,
	linux-pm@...ts.linux-foundation.org
Subject: Re: [alsa-devel] PNP_DRIVER_RES_DISABLE breaks swsusp at least with snd_cs4236

On Saturday 12 January 2008 16:21:50 Pierre Ossman wrote:
> On Sat, 12 Jan 2008 14:39:47 +0100
>
> Rene Herman <rene.herman@...access.nl> wrote:
> > On 12-01-08 12:12, Pierre Ossman wrote:
> > > I'm a bit confused here. Bjorn Helgaas wanted to remove the
> > > pnp_start/stop_dev() calls completely, and you want them called all the
> > > time. :)
> >
> > Wanted where? Haven't seen a coment from Bjorn? But -- while removing
> > them both looks (as) sensible from a mirror-image viewpoint, this
> > wouldn't fix the problem.
>
> Ah, sorry. It was a different thread. Look for a mail with the subject
> "PNP: do not stop/start devices in suspend/resume path" in the LKML och
> linux-pm archives.
>
> > But we certainly need the pnp_start_dev() in the current flow of things.
> > It not being called is the problem this fixes...
>
> I think the previous suggestion was that the drivers should call this, not
> the core, so that it behaved more like other parts of the kernel (e.g.
> PCI).

I don't think that drivers should call pnp_start_dev() on resume. All drivers 
would need to call it as all PnP cards are disabled after boot. No driver 
does that currently.

3c509 driver doesn't seem to register as pnp_card_driver so that's probably 
why it's not enable after resume. I guess that more ISA PnP drivers have this 
problem. I have some other PnP network and sound cards so I'll test them.

-- 
Ondrej Zary
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