From e02377bc8e6f830db1b464a0222a3ea88089f5c2 Mon Sep 17 00:00:00 2001
From: NeilBrown <neilb@suse.de>
Date: Sat, 3 Jul 2010 09:14:41 +1000
Subject: [PATCH] Handle print_tree of NULL block cleanly.

Don't want a BUG here..

Signed-off-by: NeilBrown <neilb@suse.de>
---
 checkpoint.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/checkpoint.c b/checkpoint.c
index 79b9de7..f484e57 100644
--- a/checkpoint.c
+++ b/checkpoint.c
@@ -204,6 +204,10 @@ int lafs_print_tree(struct block *b, int depth)
 
 	printk("%*s", depth, "");
 	printk("%s", strblk(b));
+	if (!b) {
+		printk("\n");
+		return 0;
+	}
 
 	for (i = 0; i < 2; i++) {
 		j = 0;
-- 
2.39.5