scsi: fnic: Do not call 'scsi_done()' for unhandled commands

The fnic drivers assigns an ioreq structure to each command and severs this
assignment once scsi_done() has been called and the command has been
completed.

When traversing commands to terminate outstanding I/O we should not call
scsi_done() on commands which do not have a corresponding ioreq structure;
these commands have either never entered the driver or have already been
completed.

[mkp: fixed unused label warning]

Link: https://lore.kernel.org/r/20200515112647.49260-1-hare@suse.deReported-by: kbuild test robot <lkp@intel.com>
Reviewed-by: Laurence Oberman <loberman@redhat.com>
Acked-by: Satish Kharat <satishkh@cisco.com>
Acked-by: Karan Tilak Kumar <kartilak@cisco.com>
Signed-off-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/fnic/fnic_scsi.c

@@ -1402,7 +1402,7 @@ static void fnic_cleanup_io(struct fnic *fnic, int exclude_id)
 		}
 		if (!io_req) {
 			spin_unlock_irqrestore(io_lock, flags);
-			goto cleanup_scsi_cmd;
+			continue;
 		}
 
 		CMD_SP(sc) = NULL;
@@ -1417,7 +1417,6 @@ static void fnic_cleanup_io(struct fnic *fnic, int exclude_id)
 		fnic_release_ioreq_buf(fnic, io_req, sc);
 		mempool_free(io_req, fnic->io_req_pool);
 
-cleanup_scsi_cmd:
 		sc->result = DID_TRANSPORT_DISRUPTED << 16;
 		FNIC_SCSI_DBG(KERN_DEBUG, fnic->lport->host,
 			      "%s: tag:0x%x : sc:0x%p duration = %lu DID_TRANSPORT_DISRUPTED\n",