nfsd4: fix minor memory leak

There's no need to allocate this cred more than once.

Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>

1 files changed, 2 insertions, 0 deletions

diff --git a/fs/nfsd/nfs4callback.c b/fs/nfsd/nfs4callback.c
index 8fa412ce8021..4bc22c763de7 100644
--- a/fs/nfsd/nfs4callback.c
+++ b/fs/nfsd/nfs4callback.c
@@ -525,6 +525,8 @@ static struct rpc_cred *callback_cred;
 
 int set_callback_cred(void)
 {
+        if (callback_cred)
+                return 0;
         callback_cred = rpc_lookup_machine_cred();
         if (!callback_cred)
                 return -ENOMEM;