[PATCH] nfsd4: Fix oops on nfsd4 shutdown

Fix Oops at nfsd shutdown.  Reap any open nfs4_stateowners remaining on the
close_lru hash list prior to reaping nfs4_clients at shutdown.
Signed-off-by: Andy Adamson <andros@citi.umich.edu>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Signed-off-by: Neil Brown <neilb@cse.unsw.edu.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

fs/nfsd/nfs4state.c

@@ -3238,8 +3238,15 @@ __nfs4_state_shutdown(void)
 	int i;
 	struct nfs4_client *clp = NULL;
 	struct nfs4_delegation *dp = NULL;
+	struct nfs4_stateowner *sop = NULL;
 	struct list_head *pos, *next;
 
+	list_for_each_safe(pos, next, &close_lru) {
+		sop = list_entry(pos, struct nfs4_stateowner, so_close_lru);
+		list_del(&sop->so_close_lru);
+		nfs4_put_stateowner(sop);
+	}
+
 	for (i = 0; i < CLIENT_HASH_SIZE; i++) {
 		while (!list_empty(&conf_id_hashtbl[i])) {
 			clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash);