NFS: Return an error when starting the idmapping pipe

Return an error when starting the idmapping pipe so that we can detect it
failing.

Signed-Off-By: David Howells <dhowells@redhat.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

1 files changed, 8 insertions, 4 deletions

diff --git a/fs/nfs/idmap.c b/fs/nfs/idmap.c
index d05148ec9414..231c20ffc0ff 100644
--- a/fs/nfs/idmap.c
+++ b/fs/nfs/idmap.c
@@ -108,15 +108,17 @@ static struct rpc_pipe_ops idmap_upcall_ops = {
         .destroy_msg    = idmap_pipe_destroy_msg,
 };
 
-void
+int
 nfs_idmap_new(struct nfs_client *clp)
 {
         struct idmap *idmap;
+        int error;
 
         if (clp->cl_idmap != NULL)
-                return;
+                return 0;
+
         if ((idmap = kzalloc(sizeof(*idmap), GFP_KERNEL)) == NULL)
-                return;
+                return -ENOMEM;
 
         snprintf(idmap->idmap_path, sizeof(idmap->idmap_path),
             "%s/idmap", clp->cl_rpcclient->cl_pathname);
@@ -124,8 +126,9 @@ nfs_idmap_new(struct nfs_client *clp)
         idmap->idmap_dentry = rpc_mkpipe(idmap->idmap_path,
             idmap, &idmap_upcall_ops, 0);
         if (IS_ERR(idmap->idmap_dentry)) {
+                error = PTR_ERR(idmap->idmap_dentry);
                 kfree(idmap);
-                return;
+                return error;
         }
 
         mutex_init(&idmap->idmap_lock);
@@ -135,6 +138,7 @@ nfs_idmap_new(struct nfs_client *clp)
         idmap->idmap_group_hash.h_type = IDMAP_TYPE_GROUP;
 
         clp->cl_idmap = idmap;
+        return 0;
 }
 
 void