Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost

[linux-2.6-microblaze.git] / drivers / vdpa / mlx5 / net / mlx5_vnet.c

diff --git a/drivers/vdpa/mlx5/net/mlx5_vnet.c b/drivers/vdpa/mlx5/net/mlx5_vnet.c
index f1d5481..88dde34 100644 (file)
--- a/drivers/vdpa/mlx5/net/mlx5_vnet.c
+++ b/drivers/vdpa/mlx5/net/mlx5_vnet.c
@@ -479,6 +479,11 @@ static int mlx5_vdpa_poll_one(struct mlx5_vdpa_cq *vcq)
 static void mlx5_vdpa_handle_completions(struct mlx5_vdpa_virtqueue *mvq, int num)
 {
        mlx5_cq_set_ci(&mvq->cq.mcq);
+
+       /* make sure CQ cosumer update is visible to the hardware before updating
+        * RX doorbell record.
+        */
+       dma_wmb();
        rx_post(&mvq->vqqp, num);
        if (mvq->event_cb.callback)
                mvq->event_cb.callback(mvq->event_cb.private);