NFS: Check return value from rpc_queue_upcall()

This function could fail to queue the upcall if rpc.idmapd is not running,
causing a warning message to be printed.  Instead, I want to check the
return value and revoke the key if the upcall can't be run.

Signed-off-by: Bryan Schumaker <bjschuma@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

1 files changed, 7 insertions, 2 deletions

diff --git a/fs/nfs/idmap.c b/fs/nfs/idmap.c
index f9f89fc83ee0..a701a83047d3 100644
--- a/fs/nfs/idmap.c
+++ b/fs/nfs/idmap.c
@@ -656,14 +656,19 @@ static int nfs_idmap_legacy_upcall(struct key_construction *cons,
 
         idmap->idmap_key_cons = cons;
 
-        return rpc_queue_upcall(idmap->idmap_pipe, msg);
+        ret = rpc_queue_upcall(idmap->idmap_pipe, msg);
+        if (ret < 0)
+                goto out2;
+
+        return ret;
 
 out2:
         kfree(im);
 out1:
         kfree(msg);
 out0:
-        complete_request_key(cons, ret);
+        key_revoke(cons->key);
+        key_revoke(cons->authkey);
         return ret;
 }