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

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Message-ID: <20080226173855.GA5497@gollum.tnic>
Date:	Tue, 26 Feb 2008 18:38:55 +0100
From:	Borislav Petkov <petkovbb@...glemail.com>
To:	bzolnier@...il.com
Cc:	Andreas Schwab <schwab@...e.de>,
	Kiyoshi Ueda <k-ueda@...jp.nec.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 Tue, Feb 26, 2008 at 03:52:13PM +0100, Andreas Schwab wrote:
> Borislav Petkov <petkovbb@...glemail.com> writes:
> 
> > 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?
> 
> Yes, sure.
> 
> Andreas.

Bart,

please apply the enclosed patch since it fixes dvd burning with growisofs on
Pioneer drives as reported by Andreas.

Thanks.

---
From: Andreas Schwab <schwab@...e.de>

Move counting of sense bytes into the transfer loop.

Signed-off-by: Andreas Schwab <schwab@...e.de>
Acked-by: Borislav Petkov <petkovbb@...il.com>

---
 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
 	 */

-- 
Regards/Gruß,
    Boris.
--
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