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

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Message-ID: <20080224163244.GA11998@gollum.tnic>
Date:	Sun, 24 Feb 2008 17:32:44 +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 Sat, Feb 23, 2008 at 04:47:50PM +0100, Andreas Schwab wrote:
> Kiyoshi Ueda <k-ueda@...jp.nec.com> writes:
> 
> > Could you try this patch?
> > I've only done a compile test, so this patch may not work.
> 
> Unfortunately, that is not enough to get DVD burning working again.
> This is the error that growisofs is getting:
> 
> ioctl(6, SG_IO, {'S', SG_DXFER_TO_DEV, cmd[10]=[2a, 00, 00, 00, 03, 10, 00, 00, 10, 00], mx_sb_len=64, iovec_count=0, dxfer_len=32768, timeout=60000, flags=0x3, data[32768]=["\360R\360\314Wt\277\241\36.\347\356L$\201]\210\372_~]I\213\366\253SV\2\372\356\312\257"...], status=02, masked_status=01, sb[0]=[], host_status=0, driver_status=0, resid=32768, duration=0, info=0x1}) = 0
> write(2, ":-( unable to WRITE@...=310h: ", 30) = 30
> 
> It looks like the sense buffer is not filled in.  In a successfully run
> of growisfs under 2.6.24.2 the sense code is "LONG WRITE IN PROGRESS".
> 
> I also see that resid always equals dxfer_len even when the transfer was
> successful, although growisofs does not seem to care.  With 2.6.24.2
> resid is only non-zero when a sense error occurred.

Hm, strange,

burning a dvd here with growisofs works just fine. However, my
strace -v won't dereference the struct pointer passed to the ioctl:

...
open("/dev/dvd", O_RDWR|O_NONBLOCK|O_LARGEFILE) = 5
...
ioctl(5, SG_IO, 0xbf804d14)             = 0
...
-- 
Regards/Gruß,
    Boris.
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