drbd: implement REQ_OP_WRITE_ZEROES

[karo-tx-linux.git] / drivers / block / drbd / drbd_nl.c

diff --git a/drivers/block/drbd/drbd_nl.c b/drivers/block/drbd/drbd_nl.c
index 908c704e20aa7ba57be68849b96b7797e848d9e4..e4516d3b971d0cc5b3d5b7b0bc62d26b2966c2ea 100644 (file)
--- a/drivers/block/drbd/drbd_nl.c
+++ b/drivers/block/drbd/drbd_nl.c
@@ -1217,10 +1217,12 @@ static void decide_on_discard_support(struct drbd_device *device,
                blk_queue_discard_granularity(q, 512);
                q->limits.max_discard_sectors = drbd_max_discard_sectors(connection);
                queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, q);
+               q->limits.max_write_zeroes_sectors = drbd_max_discard_sectors(connection);
        } else {
                queue_flag_clear_unlocked(QUEUE_FLAG_DISCARD, q);
                blk_queue_discard_granularity(q, 0);
                q->limits.max_discard_sectors = 0;
+               q->limits.max_write_zeroes_sectors = 0;
        }
 }