linux-kernel - Re: [2.6.20-rc6] pktcdvd doesn't work

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Message-ID: <20070202053200.GZ3754@stusta.de>
Date:	Fri, 2 Feb 2007 06:32:00 +0100
From:	Adrian Bunk <bunk@...sta.de>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Luca Tettamanti <kronos.it@...il.com>,
	Peter Osterlund <petero2@...ia.com>,
	linux-kernel@...r.kernel.org, linux-scsi@...r.kernel.org,
	Christoph Hellwig <hch@....de>
Subject: Re: [2.6.20-rc6] pktcdvd doesn't work

On Thu, Feb 01, 2007 at 08:07:12PM -0800, Andrew Morton wrote:
> On Fri, 2 Feb 2007 03:33:43 +0100 Adrian Bunk <bunk@...sta.de> wrote:
> 
> > On Thu, Feb 01, 2007 at 06:21:47PM -0800, Andrew Morton wrote:
> > > On Fri, 2 Feb 2007 00:07:52 +0100 Luca Tettamanti <kronos.it@...il.com> wrote:
> > > 
> > > > Il Thu, Feb 01, 2007 at 12:30:44AM +0100, Adrian Bunk ha scritto: 
> > > > > On Tue, Jan 30, 2007 at 08:53:19PM +0100, Luca Tettamanti wrote:
> > > > > > Hi,
> > > > > > pktcdvd on kernel 2.6.20-rc6 is not working as expected. Any file that
> > > > > > is written to the device is lost after umount.
> > > > > > I rarely use pktcdvd but at some point it used to work on my system.
> > > > > > 
> > > > > > This is what I'm doing:
> > > > > > 
> > > > > > root@...amland:/tmp# cdrwtool -d /dev/scd0 -q
> > > > > > using device /dev/scd0
> > > > > > 1029KB internal buffer
> > > > > > setting write speed to 12x
> > > > > > Settings for /dev/scd0:
> > > > > >         Fixed packets, size 32
> > > > > >         Mode-2 disc
> > > > > >...
> > > > > 
> > > > > Does 2.6.20-rc7 work?
> > > > > If no, does it work after applying the attached patch?
> > > > > If no, does 2.6.19.2 work?
> > > > 
> > > > Git current + the following patch works.
> > > > 
> > > > > diff --git a/drivers/block/pktcdvd.c b/drivers/block/pktcdvd.c
> > > > > index 6246219..7c95c76 100644
> > > > > --- a/drivers/block/pktcdvd.c
> > > > > +++ b/drivers/block/pktcdvd.c
> > > > > @@ -765,34 +765,47 @@ static inline struct bio *pkt_get_list_first(struct bio **list_head, struct bio
> > > > >   */
> > > > >  static int pkt_generic_packet(struct pktcdvd_device *pd, struct packet_command *cgc)
> > > > >  {
> > > > > -	request_queue_t *q = bdev_get_queue(pd->bdev);
> > > > > +	char sense[SCSI_SENSE_BUFFERSIZE];
> > > 
> > > Where did this patch come from?
> > 
> > It's a revert of the commits 3b00315799d78f76531b71435fbc2643cd71ae4c 
> > and 406c9b605cbc45151c03ac9a3f95e9acf050808c
> > 
> 
> Oh.  That's
> 
>  [SCSI] untangle scsi_prep_fn
> and	
>  [PATCH] Fix BUG at drivers/scsi/scsi_lib.c:1118 caused by "pktsetup dvd /dev
> 
> so this is a post-2.6.18 regression, yes?

No, a post-2.6.19 regression.

> do we know why this is happening?

No.

cu
Adrian

-- 

       "Is there not promise of rain?" Ling Tan asked suddenly out
        of the darkness. There had been need of rain for many days.
       "Only a promise," Lao Er said.
                                       Pearl S. Buck - Dragon Seed

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