linux-kernel - Re: 2.6.22-rc4-mm2: Resume from RAM on HPC nx6325 broken

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Message-Id: <200706120001.26821.rjw@sisk.pl>
Date:	Tue, 12 Jun 2007 00:01:26 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>, Pavel Machek <pavel@....cz>,
	Lee Trager <lt73@...drexel.edu>
Subject: Re: 2.6.22-rc4-mm2: Resume from RAM on HPC nx6325 broken

On Tuesday, 12 June 2007 00:01, Bartlomiej Zolnierkiewicz wrote:
> 
> On the second thought...
> 
> On Monday 11 June 2007, Bartlomiej Zolnierkiewicz wrote:
> 
> > I find it hard to accept that IDE patch is to blame for that. ;)
> 
> Arrgghhh :)  It looks more likely now...
> 
> > --- a/drivers/ide/ide.c
> > +++ b/drivers/ide/ide.c
> > @@ -1010,9 +1010,11 @@ static int generic_ide_resume(struct dev
> >  {
> >  	ide_drive_t *drive = dev->driver_data;
> >  	ide_hwif_t *hwif = HWIF(drive);
> > +	ide_driver_t *drv = to_ide_driver(dev->driver);
> >  	struct request rq;
> >  	struct request_pm_state rqpm;
> >  	ide_task_t args;
> > +	int err;
> >  
> >  	/* Call ACPI _STM only once */
> >  	if (!(drive->dn % 2))
> > @@ -1029,7 +1031,12 @@ static int generic_ide_resume(struct dev
> >  	rqpm.pm_step = ide_pm_state_start_resume;
> >  	rqpm.pm_state = PM_EVENT_ON;
> >  
> > -	return ide_do_drive_cmd(drive, &rq, ide_head_wait);
> > +	err = ide_do_drive_cmd(drive, &rq, ide_head_wait);
> > +
> > +	if (err == 0 && drv && drv->resume)
> 
> Could you try replacing this by
> 
> if (err == 0 && dev->driver && drv->resume)
> 
> and see if it fixes the problem?

Yes, that helps.  I've just posted a fix patch. :-)

Greetings,
Rafael


-- 
"Premature optimization is the root of all evil." - Donald Knuth
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