1 files changed, 19 insertions, 6 deletions

diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c
index 2604c3e70ea5..e3591073098f 100644
--- a/fs/nfsd/nfsctl.c
+++ b/fs/nfsd/nfsctl.c
@@ -4,6 +4,7 @@
  * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de>
  */
 
+#include <linux/slab.h>
 #include <linux/namei.h>
 #include <linux/ctype.h>
 
@@ -988,6 +989,7 @@ static ssize_t __write_ports_delfd(char *buf)
 static ssize_t __write_ports_addxprt(char *buf)
 {
         char transport[16];
+        struct svc_xprt *xprt;
         int port, err;
 
         if (sscanf(buf, "%15s %4u", transport, &port) != 2)
@@ -1002,13 +1004,24 @@ static ssize_t __write_ports_addxprt(char *buf)
 
         err = svc_create_xprt(nfsd_serv, transport,
                                 PF_INET, port, SVC_SOCK_ANONYMOUS);
-        if (err < 0) {
-                /* Give a reasonable perror msg for bad transport string */
-                if (err == -ENOENT)
-                        err = -EPROTONOSUPPORT;
-                return err;
-        }
+        if (err < 0)
+                goto out_err;
+
+        err = svc_create_xprt(nfsd_serv, transport,
+                                PF_INET6, port, SVC_SOCK_ANONYMOUS);
+        if (err < 0 && err != -EAFNOSUPPORT)
+                goto out_close;
         return 0;
+out_close:
+        xprt = svc_find_xprt(nfsd_serv, transport, PF_INET, port);
+        if (xprt != NULL) {
+                svc_close_xprt(xprt);
+                svc_xprt_put(xprt);
+        }
+out_err:
+        /* Decrease the count, but don't shut down the service */
+        nfsd_serv->sv_nrthreads--;
+        return err;
 }
 
 /*