[PATCH] ext3: handle aborted journals in

Teach journal_get_write_access() and journal_get_undo_access() to handle
aborted trasaction handles.

fs/jbd/transaction.c

@@ -525,12 +525,18 @@ do_get_write_access(handle_t *handle, struct journal_head *jh,
 			int force_copy, int *credits) 
 {
 	struct buffer_head *bh;
-	transaction_t *transaction = handle->h_transaction;
-	journal_t *journal = transaction->t_journal;
+	transaction_t *transaction;
+	journal_t *journal;
 	int error;
 	char *frozen_buffer = NULL;
 	int need_copy = 0;
 
+	if (is_handle_aborted(handle))
+		return -EROFS;
+
+	transaction = handle->h_transaction;
+	journal = transaction->t_journal;
+
 	jbd_debug(5, "buffer_head %p, force_copy %d\n", jh, force_copy);
 
 	JBUFFER_TRACE(jh, "entry");