virtio_blk: switch to using blk_queue_write_cache()

Signed-off-by: Jens Axboe <axboe@fb.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>

diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c
index 28cff0d..42758b5 100644 (file)
--- a/drivers/block/virtio_blk.c
+++ b/drivers/block/virtio_blk.c
@@ -493,11 +493,7 @@ static void virtblk_update_cache_mode(struct virtio_device *vdev)
        u8 writeback = virtblk_get_cache_mode(vdev);
        struct virtio_blk *vblk = vdev->priv;
 
-       if (writeback)
-               blk_queue_flush(vblk->disk->queue, REQ_FLUSH);
-       else
-               blk_queue_flush(vblk->disk->queue, 0);
-
+       blk_queue_write_cache(vblk->disk->queue, writeback, false);
        revalidate_disk(vblk->disk);
 }