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

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Date:	Mon, 18 Feb 2008 23:37:48 +0100
From:	Borislav Petkov <petkovbb@...glemail.com>
To:	Kiyoshi Ueda <k-ueda@...jp.nec.com>
Cc:	bzolnier@...il.com, schwab@...e.de, 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 18, 2008 at 09:20:41PM +0100, Borislav Petkov wrote:
> On Mon, Feb 18, 2008 at 01:58:27PM -0500, Kiyoshi Ueda wrote:
> > Hi Andreas,
> > 
> > On Sat, 16 Feb 2008 21:52:21 +0100, Andreas Schwab wrote:
> > > Since commit aaa04c28cb9a1efd42541fdb7ab648231c2a2263 [blk_end_request:
> > > changing ide-cd (take 4)] I cannot burn any CD/DVD any more, getting the
> > > following error from wodim:
> > > 
> > > Errno: 0 (Success), write_g1 scsi sendcmd: no error
> > > CDB:  2A 00 00 00 00 00 00 00 1F 00
> > > status: 0x2 (CHECK CONDITION)
> > > Sense Bytes: 70 00 05 00 00 00 00 0E 00 00 00 00 21 02 00 00
> > > Sense Key: 0x5 Illegal Request, Segment 0
> > > Sense Code: 0x21 Qual 0x02 (invalid address for write) Fru 0x0
> > > Sense flags: Blk 0 (not valid) 
> > > resid: 63488
> > 
> > Could you try this patch?
> > I've only done a compile test, so this patch may not work.
> > 
> > During the conversion to blk_end_request, the code was changed
> > *not* to set rq->data_len = 0.
> > I removed that part because I thought it was just a trigger to
> > call post_transform_command().  However, since data_len can be
> > used as a residual length of the transfer, it might have to remain
> > there.
> > Actually, wodim seems checking the residual count how far it wrote
> > (e.g. wodim/wodim.c:write_track_data()).
> 
> and there seems to be some discrepancy between the different burning tools for i
> just did test burning a cdimage with cdrdao unter 2.6.25-rc2 and it _works_
> flawlessly:
> 
> # cdrdao write --device /dev/hdc test.toc
> 
> Cdrdao version 1.2.2 - (C) Andreas Mueller <andreas@...eb.de>
>   SCSI interface library - (C) Joerg Schilling
>   Paranoia DAE library - (C) Monty
> 
> Check http://cdrdao.sourceforge.net/drives.html#dt for current driver tables.
> 
> Using libscg version 'ubuntu-0.8ubuntu1'
> 
> /dev/hdc: TOSHIBA ODD-DVD SD-R6372	Rev: 1730
> Using driver: Generic SCSI-3/MMC - Version 2.0 (options 0x0000)
> 
> Starting write at speed 4...
> Pausing 10 seconds - hit CTRL-C to abort.
> Process can be aborted with QUIT signal (usually CTRL-\).
> Turning BURN-Proof on
> Executing power calibration...
> Power calibration successful.
> Writing track 01 (mode MODE1_RAW/MODE1_RAW )...
> Wrote 1 of 18 MB (Buffers 100%  94%).
> Wrote 2 of 18 MB (Buffers 100%  94%).
> Wrote 3 of 18 MB (Buffers 100%  94%).
> Wrote 4 of 18 MB (Buffers 100%  94%).
> Wrote 5 of 18 MB (Buffers 100%  94%).
> Wrote 6 of 18 MB (Buffers 100%  94%).
> Wrote 7 of 18 MB (Buffers 100%  94%).
> Wrote 8 of 18 MB (Buffers 100%  94%).
> Wrote 9 of 18 MB (Buffers 100%  94%).
> Wrote 10 of 18 MB (Buffers 100%  94%).
> Wrote 11 of 18 MB (Buffers 100%  94%).
> Wrote 12 of 18 MB (Buffers 100%  94%).
> Wrote 13 of 18 MB (Buffers 100%  94%).
> Wrote 14 of 18 MB (Buffers 100%  94%).
> Wrote 15 of 18 MB (Buffers 100%  94%).
> Wrote 16 of 18 MB (Buffers 100%  94%).
> Wrote 17 of 18 MB (Buffers 100%  94%).
> Wrote 18 of 18 MB (Buffers 100%  94%).
> 
> Wrote 8056 blocks. Buffer fill min 100%/max 100%.
> Flushing cache...
> Writing finished successfully.
> 
> > This patch brings back the rq->data_len = 0.
> > 
> > --- 2.6.25-rc2/drivers/ide/ide-cd.c	2008-02-15 15:57:20.000000000 -0500
> > +++ ide-fix/drivers/ide/ide-cd.c	2008-02-18 01:23:40.000000000 -0500
> > @@ -1207,9 +1207,13 @@ static ide_startstop_t cdrom_newpc_intr(
> >  end_request:
> >  	if (blk_pc_request(rq)) {
> >  		unsigned long flags;
> > +		unsigned int dlen = rq->data_len;
> > +
> > +		if (dma)
> > +			rq->data_len = 0;
> >  
> >  		spin_lock_irqsave(&ide_lock, flags);
> > -		if (__blk_end_request(rq, 0, rq->data_len))
> > +		if (__blk_end_request(rq, 0, dlen))
> >  			BUG();
> >  		HWGROUP(drive)->rq = NULL;
> >  		spin_unlock_irqrestore(&ide_lock, flags);
> > 
> > Thanks,
> > Kiyoshi Ueda
> 
> next will test the one above...


confirmed here too - burning succeeds both with wodim and cdrdao.
> 
> -- 
> Regards/Gruß,
>     Boris.

-- 
Regards/Gruß,
    Boris.
--
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