nfsd4: put_nfs4_client does not require state lock

Since free_client() is guaranteed to only be called once, and to only
touch the client structure itself (not any common data structures), it
has no need for the state lock.
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Cc: Alexandros Batsakis <batsakis@netapp.com>

fs/nfsd/nfs4callback.c

@@ -490,8 +490,8 @@ out_put_cred:
 	 * Success or failure, now we're either waiting for lease expiration
 	 * or deleg_return.
 	 */
-	nfs4_lock_state();
 	put_nfs4_client(clp);
+	nfs4_lock_state();
 	nfs4_put_delegation(dp);
 	nfs4_unlock_state();
 	return;