scsi_add_single_device — Respond to user request to probe for/add device
user-supplied decimal integer
user-supplied decimal integer
user-supplied decimal integer
user-supplied decimal integer
called by writing “scsi add-single-device” to /proc/scsi/scsi.
does scsi_host_lookup and either user_scan if that transport type supports it, or else scsi_scan_host_selected
this seems to be aimed exclusively at SCSI parallel busses.