linux-kernel - Re: [PATCH] SCSI IOCTL: Check for device deletion [was Re: __elv_add

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Message-ID: <alpine.DEB.2.02.1105251622040.8972@ubuntu-natty>
Date:	Wed, 25 May 2011 16:22:50 -0400 (EDT)
From:	Parag Warudkar <parag.lkml@...il.com>
To:	James Bottomley <James.Bottomley@...senpartnership.com>
cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Parag Warudkar <parag.lkml@...il.com>,
	Jens Axboe <jaxboe@...ionio.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
	Linux SCSI List <linux-scsi@...r.kernel.org>
Subject: Re: [PATCH] SCSI IOCTL: Check for device deletion [was Re:
 __elv_add_request OOPS]



On Wed, 25 May 2011, James Bottomley wrote:

> On Wed, 2011-05-25 at 13:03 -0700, Linus Torvalds wrote:
> > On Wed, May 25, 2011 at 12:52 PM, Parag Warudkar <parag.lkml@...il.com> wrote:
> > >
> > > +static inline int sdev_early_check(struct scsi_device *sdev)
> > > +{
> > > +       if (!sdev || sdev->sdev_state == SDEV_DEL
> > > +               || sdev->sdev_state > SDEV_QUIESCE)
> > > +               return -ENXIO;
> > > +       return 0;
> > > +}
> > 
> > Can somebody explain why it's those states, and nothing else?
> 
> The states are definitely wrong.  QUIESCE shouldn't cause an error.
> 
QUIESCE is not causing an error above - > QUIESCE is which per the 
documentation is correct.

Parag
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