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

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Message-ID: <47B9E2A1.6090200@gmail.com>
Date:	Mon, 18 Feb 2008 20:55:13 +0100
From:	Laura Garcia <nevola@...il.com>
To:	Kiyoshi Ueda <k-ueda@...jp.nec.com>
CC:	schwab@...e.de, bzolnier@...il.com, linux-kernel@...r.kernel.org,
	jens.axboe@...cle.com, petkovbb@...il.com, j-nomura@...jp.nec.com
Subject: Re: 2.6.25-rc1/2 CD/DVD burning broken

It works great for me.

Thanks,
Laura.

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()).
> 
> 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

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