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 <bvanass...@acm.org>
> Cc: Tejun Heo <t...@kernel.org>
> Cc: James Bottomley <jbottom...@parallels.com>
> Cc: Mike Christie <micha...@cs.wisc.edu>
> Cc: Hannes Reinecke <h...@suse.de>
> Cc: David Milburn <dmilb...@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 <h...@suse.de>

Cheers,

Hannes
-- 
Dr. Hannes Reinecke                   zSeries & Storage
h...@suse.de                          +49 911 74053 688
SUSE LINUX Products GmbH, Maxfeldstr. 5, 90409 Nürnberg
GF: J. Hawn, J. Guild, F. Imendörffer, HRB 16746 (AG Nürnberg)
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