From: Alasdair G Kergon <agk@redhat.com>
Date: Mon, 21 Jul 2008 11:00:31 +0000 (+0100)
Subject: dm mpath: fix test for reinstate_path
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=def052d21c4e77975bb75cf212f018ec913f8e2f;p=linux-beck.git

dm mpath: fix test for reinstate_path

Fix test for reinstate_path method before attempting to use it.

Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Cc: Julia Lawall <julia@diku.dk>
---

diff --git a/drivers/md/dm-mpath.c b/drivers/md/dm-mpath.c
index 230d7890ec8a..fea966d66f98 100644
--- a/drivers/md/dm-mpath.c
+++ b/drivers/md/dm-mpath.c
@@ -871,7 +871,7 @@ static int reinstate_path(struct pgpath *pgpath)
 	if (pgpath->path.is_active)
 		goto out;
 
-	if (!pgpath->pg->ps.type) {
+	if (!pgpath->pg->ps.type->reinstate_path) {
 		DMWARN("Reinstate path not supported by path selector %s",
 		       pgpath->pg->ps.type->name);
 		r = -EINVAL;