1 files changed, 18 insertions, 9 deletions

diff --git a/fs/nfs/client.c b/fs/nfs/client.c
index 34c3996bd0f5..5fea638743e4 100644
--- a/fs/nfs/client.c
+++ b/fs/nfs/client.c
@@ -232,11 +232,15 @@ void nfs_put_client(struct nfs_client *clp)
  * Find a client by address
  * - caller must hold nfs_client_lock
  */
-static struct nfs_client *__nfs_find_client(const struct sockaddr_in *addr, int nfsversion)
+static struct nfs_client *__nfs_find_client(const struct sockaddr_in *addr, int nfsversion, int match_port)
 {
         struct nfs_client *clp;
 
         list_for_each_entry(clp, &nfs_client_list, cl_share_link) {
+                /* Don't match clients that failed to initialise properly */
+                if (clp->cl_cons_state < 0)
+                        continue;
+
                 /* Different NFS versions cannot share the same nfs_client */
                 if (clp->cl_nfsversion != nfsversion)
                         continue;
@@ -245,7 +249,7 @@ static struct nfs_client *__nfs_find_client(const struct sockaddr_in *addr, int
                            sizeof(clp->cl_addr.sin_addr)) != 0)
                         continue;
 
-                if (clp->cl_addr.sin_port == addr->sin_port)
+                if (!match_port || clp->cl_addr.sin_port == addr->sin_port)
                         goto found;
         }
 
@@ -265,11 +269,12 @@ struct nfs_client *nfs_find_client(const struct sockaddr_in *addr, int nfsversio
         struct nfs_client *clp;
 
         spin_lock(&nfs_client_lock);
-        clp = __nfs_find_client(addr, nfsversion);
+        clp = __nfs_find_client(addr, nfsversion, 0);
         spin_unlock(&nfs_client_lock);
-
-        BUG_ON(clp && clp->cl_cons_state == 0);
-
+        if (clp != NULL && clp->cl_cons_state != NFS_CS_READY) {
+                nfs_put_client(clp);
+                clp = NULL;
+        }
         return clp;
 }
 
@@ -292,7 +297,7 @@ static struct nfs_client *nfs_get_client(const char *hostname,
         do {
                 spin_lock(&nfs_client_lock);
 
-                clp = __nfs_find_client(addr, nfsversion);
+                clp = __nfs_find_client(addr, nfsversion, 1);
                 if (clp)
                         goto found_client;
                 if (new)
@@ -849,6 +854,7 @@ error:
  */
 static int nfs4_init_client(struct nfs_client *clp,
                 int proto, int timeo, int retrans,
+                const char *ip_addr,
                 rpc_authflavor_t authflavour)
 {
         int error;
@@ -865,6 +871,7 @@ static int nfs4_init_client(struct nfs_client *clp,
         error = nfs_create_rpc_client(clp, proto, timeo, retrans, authflavour);
         if (error < 0)
                 goto error;
+        memcpy(clp->cl_ipaddr, ip_addr, sizeof(clp->cl_ipaddr));
 
         error = nfs_idmap_new(clp);
         if (error < 0) {
@@ -888,6 +895,7 @@ error:
  */
 static int nfs4_set_client(struct nfs_server *server,
                 const char *hostname, const struct sockaddr_in *addr,
+                const char *ip_addr,
                 rpc_authflavor_t authflavour,
                 int proto, int timeo, int retrans)
 {
@@ -902,7 +910,7 @@ static int nfs4_set_client(struct nfs_server *server,
                 error = PTR_ERR(clp);
                 goto error;
         }
-        error = nfs4_init_client(clp, proto, timeo, retrans, authflavour);
+        error = nfs4_init_client(clp, proto, timeo, retrans, ip_addr, authflavour);
         if (error < 0)
                 goto error_put;
 
@@ -971,7 +979,7 @@ struct nfs_server *nfs4_create_server(const struct nfs4_mount_data *data,
                 return ERR_PTR(-ENOMEM);
 
         /* Get a client record */
-        error = nfs4_set_client(server, hostname, addr, authflavour,
+        error = nfs4_set_client(server, hostname, addr, ip_addr, authflavour,
                         data->proto, data->timeo, data->retrans);
         if (error < 0)
                 goto error;
@@ -1041,6 +1049,7 @@ struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *data,
         /* Get a client representation.
          * Note: NFSv4 always uses TCP, */
         error = nfs4_set_client(server, data->hostname, data->addr,
+                        parent_client->cl_ipaddr,
                         data->authflavor,
                         parent_server->client->cl_xprt->prot,
                         parent_client->retrans_timeo,