Re: [PATCH 2/2] [SCSI] ibmvscsi: Fix SCSI scanning

[Brian King <brking@linux.vnet.ibm.com>]

On 06/19/2011 06:48 AM, Bart Van Assche wrote:
> diff --git a/drivers/scsi/ibmvscsi/ibmvscsi.c b/drivers/scsi/ibmvscsi/ibmvscsi.c
> index 3d391dc..c31adf5 100644
> --- a/drivers/scsi/ibmvscsi/ibmvscsi.c
> +++ b/drivers/scsi/ibmvscsi/ibmvscsi.c
> @@ -498,6 +498,11 @@ static void purge_requests(struct ibmvscsi_host_data *hostdata, int error_code)
>  	spin_unlock_irqrestore(hostdata->host->host_lock, flags);
>  }
> 
> +static int ibmvscsi_target_alloc(struct scsi_target *starget)
> +{
> +	return starget->channel == 0 ? 0 : -ENODEV;
> +}
> +

This will break existing IBM Power users who have more than 64 virtual disks assigned
to a single virtual scsi adapter. The IBM VSCSI target uses Logical Unit Addressing (10b)
and does bus/id/lun -> vscsi LUN mapping as defined in SAM. The 65'th virtual scsi
disk would show up on bus 1 as target 0.

Thanks,

Brian

-- 
Brian King
Linux on Power Virtualization
IBM Linux Technology Center