linux-kernel - Re: "reboot" swsusp mode leaves moon icon blinking

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Message-Id: <200703202203.27009.rjw@sisk.pl>
Date:	Tue, 20 Mar 2007 22:03:26 +0100
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Pavel Machek <pavel@....cz>
Cc:	kernel list <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...l.org>
Subject: Re: "reboot" swsusp mode leaves moon icon blinking

On Tuesday, 20 March 2007 18:20, Pavel Machek wrote:
> Hi!
> 
> > > ...and cause is really simple.
> > > 
> > > During resume, we do not know that "reboot" method was used, so we
> > > assume plaform and make the led blink...
> > > 
> > > Unfortunately I see no easy solution, and this may/will cause other
> > > problems -- in case of broken bios and user telling us not to call
> > > that bios, we'll call it anyway.
> > > 
> > > (Ouch and I think this is regression after 2.6.20?)
> > 
> > I'm not sure, will check that later.
> > 
> > The solution would be to pass the information about the suspend mode used
> > in the image header, I think (that's what uswsusp does after my recent patch).
> 
> Yes, we could do that.
> 
> OTOH, we could simply avoid calling the platform code in resume
> path. It worked ok for a long while, and it seems to have no
> downsides...

No, we have always done it, actually, but not in this particular place. ;-)

In theory, avoiding it could be problematic, because of the pm_ops->finish()
that gets called after the image has been restored (if the platform mode was
used for suspending).  Still, I think we can try.

Greetings,
Rafael
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