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SubjectRe: [2.6.20-rc6] pktcdvd doesn't work
On Fri, 2 Feb 2007 03:33:43 +0100 Adrian Bunk <bunk@stusta.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@gmail.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@dreamland:/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?

do we know why this is happening?
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