fabrics: Only disconnect discovery controllers during 'connect-all'

When calling 'connect-all' the 'persistent' argument only applies to
discovery controllers; normal I/O controllers should stay connected,
as this was kinda the point...

Signed-off-by: Hannes Reinecke <hare@suse.de>

Author: hreinecke

fabrics.c

@@ -302,7 +302,8 @@ static int __discover(nvme_ctrl_t c, const struct nvme_fabrics_config *defcfg,
 					__discover(child, defcfg, raw,
 						   persistent,
 						   true, flags);
-				if (!persistent) {
+				if (e->subtype != NVME_NQN_NVME &&
+				    !persistent) {
 					nvme_disconnect_ctrl(child);
 					nvme_free_ctrl(child);
 				}