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>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/md/dm-delay.c b/drivers/md/dm-delay.c
index a91049e05219..baa11912cc94 100644
--- 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;