[PATCH 5.15 38/98] vdpa/mlx5: Update Control VQ callback information

[Greg Kroah-Hartman]

From: Eli Cohen <elic@xxxxxxxxxx>

commit 40f2f3e94178d45e4ee6078effba2dfc76f6f5ba upstream.

The control VQ specific information is stored in the dedicated struct
mlx5_control_vq. When the callback is updated through
mlx5_vdpa_set_vq_cb(), make sure to update the control VQ struct.

Fixes: 5262912ef3cf ("vdpa/mlx5: Add support for control VQ and MAC setting")
Signed-off-by: Eli Cohen <elic@xxxxxxxxxx>
Message-Id: <20220613075958.511064-1-elic@xxxxxxxxxx>
Signed-off-by: Michael S. Tsirkin <mst@xxxxxxxxxx>
Acked-by: Jason Wang <jasowang@xxxxxxxxxx)
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/vdpa/mlx5/net/mlx5_vnet.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/drivers/vdpa/mlx5/net/mlx5_vnet.c
+++ b/drivers/vdpa/mlx5/net/mlx5_vnet.c
@@ -1698,6 +1698,8 @@ static void mlx5_vdpa_set_vq_cb(struct v
 	struct mlx5_vdpa_net *ndev = to_mlx5_vdpa_ndev(mvdev);
 
 	ndev->event_cbs[idx] = *cb;
+	if (is_ctrl_vq_idx(mvdev, idx))
+		mvdev->cvq.event_cb = *cb;
 }
 
 static void mlx5_cvq_notify(struct vringh *vring)