1 files changed, 2 insertions, 0 deletions

diff --git a/block/ioctl.c b/block/ioctl.c
index 1f4d1de12b09..be48ea51faee 100644
--- a/block/ioctl.c
+++ b/block/ioctl.c
@@ -280,6 +280,8 @@ int blkdev_ioctl(struct block_device *bdev, fmode_t mode, unsigned cmd,
                 return put_uint(arg, bdev_io_opt(bdev));
         case BLKALIGNOFF:
                 return put_int(arg, bdev_alignment_offset(bdev));
+        case BLKDISCARDZEROES:
+                return put_uint(arg, bdev_discard_zeroes_data(bdev));
         case BLKSECTGET:
                 return put_ushort(arg, queue_max_sectors(bdev_get_queue(bdev)));
         case BLKRASET: