From: NeilBrown <neilb@suse.de>
Date: Wed, 19 Jun 2013 06:55:35 +0000 (+1000)
Subject: Grow: a data_offset should not be tested against 0.
X-Git-Tag: mdadm-3.3-rc1~14
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e09233d0482c73c727d34c8b6fa4a3536382341f;p=thirdparty%2Fmdadm.git

Grow: a data_offset should not be tested against 0.

It should always be tested against INVALID_SECTORS!!!

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

diff --git a/Grow.c b/Grow.c
index c3660828..afd40d30 100644
--- a/Grow.c
+++ b/Grow.c
@@ -2792,7 +2792,7 @@ static int reshape_array(char *container, int fd, char *devname,
 		Manage_subdevs(devname, fd, devlist, verbose,
 			       0,NULL, 0);
 
-	if (reshape.backup_blocks == 0 && data_offset)
+	if (reshape.backup_blocks == 0 && data_offset != INVALID_SECTORS)
 		reshape.backup_blocks = reshape.before.data_disks * info->array.chunk_size/512;
 	if (reshape.backup_blocks == 0) {
 		/* No restriping needed, but we might need to impose