linux-kernel - Re: IDE crash...

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Message-ID: <20071023074554.GA5059@kernel.dk>
Date:	Tue, 23 Oct 2007 09:45:54 +0200
From:	Jens Axboe <jens.axboe@...cle.com>
To:	David Miller <davem@...emloft.net>
Cc:	fujita.tomonori@....ntt.co.jp, linux-kernel@...r.kernel.org
Subject: Re: IDE crash...

On Tue, Oct 23 2007, David Miller wrote:
> From: Jens Axboe <jens.axboe@...cle.com>
> Date: Tue, 23 Oct 2007 09:23:59 +0200
> 
> > On Tue, Oct 23 2007, David Miller wrote:
> > > From: Jens Axboe <jens.axboe@...cle.com>
> > > Date: Tue, 23 Oct 2007 09:09:33 +0200
> > > 
> > > > Eh this wont work, it's the wrong entry... Here's a temporary
> > > > work-around.
> > > > 
> > > > diff --git a/drivers/ide/ide-io.c b/drivers/ide/ide-io.c
> > > > index c89f0d3..108202b 100644
> > > > --- a/drivers/ide/ide-io.c
> > > > +++ b/drivers/ide/ide-io.c
> > > > @@ -822,6 +822,7 @@ void ide_map_sg(ide_drive_t *drive, struct request *rq)
> > > >  		return;
> > > >  
> > > >  	if (rq->cmd_type != REQ_TYPE_ATA_TASKFILE) {
> > > > +		sg_init_table(hwif->sg_table, hwif->sg_max_nents);
> > > >  		hwif->sg_nents = blk_rq_map_sg(drive->queue, rq, sg);
> > > >  	} else {
> > > >  		sg_init_one(sg, rq->buffer, rq->nr_sectors * SECTOR_SIZE);
> > > 
> > > That's the exact patch I'm about to boot test :-)
> > 
> > That should work - once you verify that, would you mind testing this one
> > as well? Thanks!
> 
> This one works here too, thanks.

Great, thanks for testing that as well. Thinking a bit more about it, I
think the forced clear should stay in blk_rq_map_sg() since we don't
want to advertise it to drivers. So I'll just open-code it in there.

-- 
Jens Axboe

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