dm delay: support discard

Enable discard support for the delay target.

Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>

diff --git a/drivers/md/dm-delay.c b/drivers/md/dm-delay.c
index a91049e..baa1191 100644 (file)
--- a/drivers/md/dm-delay.c
+++ b/drivers/md/dm-delay.c
@@ -198,6 +198,7 @@ out:
        atomic_set(&dc->may_delay, 1);
 
        ti->num_flush_requests = 1;
+       ti->num_discard_requests = 1;
        ti->private = dc;
        return 0;