Linux Virtualization - Oct 2014 - [PATCH RFC] virtio_blk: WCE is assumed on under VIRTIO 1.0

Signed-off-by: Michael S. Tsirkin <mst at redhat.com>
---
 drivers/block/virtio_blk.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c
index adfba9f..1f8b111 100644
--- a/drivers/block/virtio_blk.c
+++ b/drivers/block/virtio_blk.c
@@ -478,7 +478,8 @@ static int virtblk_get_cache_mode(struct virtio_device
*vdev)
 				   struct virtio_blk_config, wce,
 				   &writeback);
 	if (err)
-		writeback = virtio_has_feature(vdev, VIRTIO_BLK_F_WCE);
+		writeback = virtio_has_feature(vdev, VIRTIO_BLK_F_WCE) ||
+		            virtio_has_feature(vdev, VIRTIO_F_VERSION_1);
 
 	return writeback;
 }
-- 
MST