From: Hannes Reinecke <hare@suse.de>
To: Bart Van Assche <bvanassche@acm.org>
Cc: James Bottomley <jbottomley@parallels.com>,
Mike Christie <michaelc@cs.wisc.edu>,
Chanho Min <chanho.min@lge.com>, Joe Lawrence <jdl1291@gmail.com>,
linux-scsi <linux-scsi@vger.kernel.org>,
David Milburn <dmilburn@redhat.com>, Tejun Heo <tj@kernel.org>
Subject: Re: [PATCH v12 3/6] Restrict device state changes allowed via sysfs
Date: Mon, 01 Jul 2013 10:23:09 +0200 [thread overview]
Message-ID: <51D13C6D.4000906@suse.de> (raw)
In-Reply-To: <51CC522A.4010805@acm.org>
On 06/27/2013 04:54 PM, Bart Van Assche wrote:
> Restrict the SCSI device state changes allowd via sysfs to the
> OFFLINE<>RUNNING transitions. Other transitions may confuse
> the SCSI mid-layer. As an example, changing the state of a SCSI
> device via sysfs into "cancel" or "deleted" prevents removal of
> a SCSI device by scsi_remove_host().
>
> Signed-off-by: Bart Van Assche <bvanassche@acm.org>
> Cc: Tejun Heo <tj@kernel.org>
> Cc: James Bottomley <JBottomley@Parallels.com>
> Cc: Mike Christie <michaelc@cs.wisc.edu>
> Cc: Hannes Reinecke <hare@suse.de>
> Cc: David Milburn <dmilburn@redhat.com>
> ---
> drivers/scsi/scsi_sysfs.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/scsi/scsi_sysfs.c b/drivers/scsi/scsi_sysfs.c
> index 931a7d9..013c6de 100644
> --- a/drivers/scsi/scsi_sysfs.c
> +++ b/drivers/scsi/scsi_sysfs.c
> @@ -605,7 +605,7 @@ store_state_field(struct device *dev, struct device_attribute *attr,
> break;
> }
> }
> - if (!state)
> + if (state != SDEV_OFFLINE && state != SDEV_RUNNING)
> return -EINVAL;
>
> if (scsi_device_set_state(sdev, state))
>
Acked-by: Hannes Reinecke <hare@suse.de>
Cheers,
Hannes
--
Dr. Hannes Reinecke zSeries & Storage
hare@suse.de +49 911 74053 688
SUSE LINUX Products GmbH, Maxfeldstr. 5, 90409 Nürnberg
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next prev parent reply other threads:[~2013-07-01 8:23 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-27 14:51 [PATCH v12 0/6] SCSI device removal fixes Bart Van Assche
2013-06-27 14:52 ` [PATCH v12 1/6] Fix race between starved list and device removal Bart Van Assche
2013-06-27 14:53 ` [PATCH v12 2/6] Avoid calling __scsi_remove_device() twice Bart Van Assche
2013-07-01 7:05 ` James Bottomley
2013-07-01 7:14 ` Bart Van Assche
2013-07-01 14:38 ` James Bottomley
2013-06-27 14:54 ` [PATCH v12 3/6] Restrict device state changes allowed via sysfs Bart Van Assche
2013-07-01 8:23 ` Hannes Reinecke [this message]
2013-07-01 14:51 ` James Bottomley
2013-06-27 14:55 ` [PATCH v12 4/6] Avoid saving/restoring interrupt state inside scsi_remove_host() Bart Van Assche
2013-06-27 14:56 ` [PATCH v12 5/6] Avoid that scsi_device_set_state() triggers a race Bart Van Assche
2013-07-01 14:49 ` James Bottomley
2013-07-01 15:17 ` Bart Van Assche
2013-07-01 16:52 ` James Bottomley
2013-07-02 6:42 ` Bart Van Assche
2013-06-27 14:57 ` [PATCH v12 6/6] Avoid re-enabling I/O after the transport became offline Bart Van Assche
2013-07-01 8:27 ` Hannes Reinecke
2013-07-01 12:05 ` Bart Van Assche
2013-07-01 12:09 ` Hannes Reinecke
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