linux-kernel - Re: 2.6.25-rc1/2 CD/DVD burning broken

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Message-ID: <20080226042414.GB26788@gollum.tnic>
Date:	Tue, 26 Feb 2008 05:24:14 +0100
From:	Borislav Petkov <petkovbb@...glemail.com>
To:	Andreas Schwab <schwab@...e.de>
Cc:	Kiyoshi Ueda <k-ueda@...jp.nec.com>, bzolnier@...il.com,
	linux-kernel@...r.kernel.org, jens.axboe@...cle.com,
	j-nomura@...jp.nec.com
Subject: Re: 2.6.25-rc1/2 CD/DVD burning broken

On Mon, Feb 25, 2008 at 11:08:55PM +0100, Andreas Schwab wrote:
> Borislav Petkov <petkovbb@...glemail.com> writes:
> 
> > On Mon, Feb 25, 2008 at 08:38:22PM +0100, Andreas Schwab wrote:
> >> "Kiyoshi Ueda" <k-ueda@...jp.nec.com> writes:
> >> 
> >> > I'm looking at this problem, but currently no idea why the conversion
> >> > to blk_end_request causes it.
> >> 
> >> cdrom_newpc_intr apparently never sets rq->sense_len.
> >> 
> >
> > actually it does, see the code chunk around line 1188 in 2.6.25-rc2, for
> > example.
> 
> Yes, it does, but it always adds zero.

yep, true. Does that fix your dvd burning problem?

> Move counting of sense bytes into the transfer loop.
> 
> Signed-off-by: Andreas Schwab <schwab@...e.de>
> 
> ---
>  drivers/ide/ide-cd.c |    5 ++---
>  1 file changed, 2 insertions(+), 3 deletions(-)
> 
> --- linux-2.6.25-rc3.orig/drivers/ide/ide-cd.c	2008-02-25 01:03:31.000000000 +0100
> +++ linux-2.6.25-rc3/drivers/ide/ide-cd.c	2008-02-25 22:54:42.000000000 +0100
> @@ -1182,11 +1182,10 @@ static ide_startstop_t cdrom_newpc_intr(
>  			else
>  				rq->data += blen;
>  		}
> +		if (!write && blk_sense_request(rq))
> +			rq->sense_len += blen;
>  	}
>  
> -	if (write && blk_sense_request(rq))
> -		rq->sense_len += thislen;
> -
>  	/*
>  	 * pad, if necessary
>  	 */
> 
> Andreas.
> 
> -- 
> Andreas Schwab, SuSE Labs, schwab@...e.de
> SuSE Linux Products GmbH, Maxfeldstraße 5, 90409 Nürnberg, Germany
> PGP key fingerprint = 58CA 54C7 6D53 942B 1756  01D3 44D5 214B 8276 4ED5
> "And now for something completely different."

-- 
Regards/Gruß,
    Boris.
--
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