nvme-tcp: send only permitted commands for secure concat

In addition to sending permitted commands such as connect/auth
over the initial unencrypted admin connection as part of secure
channel concatenation, the host also sends commands such as
Property Get and Identify on the same. This is a spec violation
leading to secure concat failures. Fix this by ensuring these
additional commands are avoided on this connection.

Fixes: 104d0e2 ("nvme-fabrics: reset admin connection for secure concatenation")
Signed-off-by: Martin George <marting@netapp.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Keith Busch <kbusch@kernel.org>

Author: martin-gpy

drivers/nvme/host/tcp.c

@@ -2250,6 +2250,9 @@ static int nvme_tcp_configure_admin_queue(struct nvme_ctrl *ctrl, bool new)
 	if (error)
 		goto out_cleanup_tagset;
 
+	if (ctrl->opts->concat && !ctrl->tls_pskid)
+		return 0;
+
 	error = nvme_enable_ctrl(ctrl);
 	if (error)
 		goto out_stop_queue;