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 230d789..fea966d 100644 (file)
--- 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;