linux-kernel - Re: [BUG] Linux-2.6.31-rc1-git9 Cannot Recognize Empty DVD Media

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Message-Id: <20090709170727S.fujita.tomonori@lab.ntt.co.jp>
Date:	Thu, 9 Jul 2009 17:08:51 +0900
From:	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>
To:	jens.axboe@...cle.com
Cc:	fujita.tomonori@....ntt.co.jp,
	James.Bottomley@...senPartnership.com, dwalker@...o99.com,
	maciej.rutecki@...il.com, akpm@...ux-foundation.org,
	tarkan.erimer@...knet.net.tr, linux-kernel@...r.kernel.org,
	linux-scsi@...r.kernel.org
Subject: Re: [BUG] Linux-2.6.31-rc1-git9 Cannot Recognize Empty DVD Media

On Thu, 9 Jul 2009 09:50:04 +0200
Jens Axboe <jens.axboe@...cle.com> wrote:

> On Thu, Jul 09 2009, FUJITA Tomonori wrote:
> > From: FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>
> > Subject: [PATCH] block: call blk_scsi_ioctl_init()
> > 
> > Currently, blk_scsi_ioctl_init() is not called so
> > blk_default_cmd_filter isn't initalized. Some commands are not blocked
> > wrongly.
> > 
> > This fixes a regression introduced:
> > 
> > commit 018e0446890661504783f92388ecce7138c1566d
> > Author: Jens Axboe <jens.axboe@...cle.com>
> > Date:   Fri Jun 26 16:27:10 2009 +0200
> > 
> >     block: get rid of queue-private command filter
> > 
> > Signed-off-by: FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>
> > ---
> >  block/scsi_ioctl.c |    1 +
> >  1 files changed, 1 insertions(+), 0 deletions(-)
> > 
> > diff --git a/block/scsi_ioctl.c b/block/scsi_ioctl.c
> > index f0e0ce0..e5b1001 100644
> > --- a/block/scsi_ioctl.c
> > +++ b/block/scsi_ioctl.c
> > @@ -680,3 +680,4 @@ int __init blk_scsi_ioctl_init(void)
> >  	blk_set_cmd_filter_defaults(&blk_default_cmd_filter);
> >  	return 0;
> >  }
> > +fs_initcall(blk_scsi_ioctl_init);
> > -- 
> > 1.6.0.6
> 
> You beat me to it, it was the missing call as I suspected. This
> works, I verified it myself. Applied to for-linus, going upstream
> soon.

I really hope that you become more serious about not causing such
incident; breaking mainline kernel by merging your trivial patch after
-rc1 (even without sending the patch to any mailing list). You broke
mainline in the exact same way just months ago (the commit
1e42807918d17e8c93bf14fbb74be84b141334c1 in 2.6.29-rc7).


Thanks,
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