From: NeilBrown <neilb@suse.de>
Date: Fri, 2 Jul 2010 23:14:41 +0000 (+1000)
Subject: Handle print_tree of NULL block cleanly.
X-Git-Url: http://git.neil.brown.name/?a=commitdiff_plain;h=e02377bc8e6f830db1b464a0222a3ea88089f5c2;p=LaFS.git

Handle print_tree of NULL block cleanly.

Don't want a BUG here..

Signed-off-by: NeilBrown <neilb@suse.de>
---

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;