two SCSI HBAs having same host no in Linux 2.4 kernel

["N.C.Krishna Murthy" <krmurthy@cisco.com>]

Hi,
	In 2.4 kernel ,a scsi HBA driver gets it's host no after scsi_register() call 
returns.
The call to scsi_register is made from the driver's 'detect' routine.
scsi_register_host calls the driver's 'detect' routine.

The following is an excerpt from scsi_register_host which does the above job.
-----------------------------------------------------------------------------
if (tpnt->use_new_eh_code) {
                spin_lock_irqsave(&io_request_lock, flags);
                tpnt->present = tpnt->detect(tpnt);
                spin_unlock_irqrestore(&io_request_lock, flags);
        } else
                tpnt->present = tpnt->detect(tpnt);
-----------------------------------------------------------------------------
In case of drivers which do not support new_eh_code, 'detect' is called
without any locks. Is this SMP safe? 

We were testing our iSCSI driver on an SMP machine which had a FC HBA as well.
Both iSCSI driver and FC HBA had the same host no allocated. The behaviour
could not be reproduced consistently though. 

Please let me know in case I am missing something.


Thanx
N.C.Krishna Murthy