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>

diff --git a/fs/nfsd/nfs4callback.c b/fs/nfsd/nfs4callback.c
index 8fa412ce802151382a34679c4c7f7cc628067541..4bc22c763de7b433b4a37f2affdf75cc560d3908 100644 (file)
--- 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;