nfsd: nfsd_destroy_serv() must call svc_destroy() even if nfsd_startu…

…p_net() failed

If nfsd_startup_net() fails and so ->nfsd_net_up is false,
nfsd_destroy_serv() doesn't currently call svc_destroy().  It should.

Fixes: 1e3577a ("SUNRPC: discard sv_refcnt, and svc_get/svc_put")
Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>

fs/nfsd/nfssvc.c

@@ -385,6 +385,9 @@ static void nfsd_shutdown_net(struct net *net)
 {
 	struct nfsd_net *nn = net_generic(net, nfsd_net_id);
 
+	if (!nn->nfsd_net_up)
+		return;
+	nfsd_export_flush(net);
 	nfs4_state_shutdown_net(net);
 	nfsd_reply_cache_shutdown(nn);
 	nfsd_file_cache_shutdown_net(net);
@@ -492,11 +495,8 @@ void nfsd_destroy_serv(struct net *net)
 	 * other initialization has been done except the rpcb information.
 	 */
 	svc_rpcb_cleanup(serv, net);
-	if (!nn->nfsd_net_up)
-		return;
 
 	nfsd_shutdown_net(net);
-	nfsd_export_flush(net);
 	svc_destroy(&serv);
 }