mlx4_en: Assign dummy event handler for TX queue

The low level driver always assumes this handler exists.
The lack of it could cause kernel panic
Signed-off-by: Yevgeny Petrilin <yevgenyp@mellanox.co.il>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/mlx4/en_resources.c

@@ -94,3 +94,9 @@ void mlx4_en_unmap_buffer(struct mlx4_buf *buf)
 
 	vunmap(buf->direct.buf);
 }
+
+void mlx4_en_sqp_event(struct mlx4_qp *qp, enum mlx4_event event)
+{
+    return;
+}
+

drivers/net/mlx4/en_rx.c

@@ -928,12 +928,6 @@ void mlx4_en_set_default_rss_map(struct mlx4_en_priv *priv,
 	}
 }
 
-static void mlx4_en_sqp_event(struct mlx4_qp *qp, enum mlx4_event event)
-{
-    return;
-}
-
-
 static int mlx4_en_config_rss_qp(struct mlx4_en_priv *priv,
 				 int qpn, int srqn, int cqn,
 				 enum mlx4_qp_state *state,

drivers/net/mlx4/en_tx.c

@@ -112,6 +112,7 @@ int mlx4_en_create_tx_ring(struct mlx4_en_priv *priv,
 		mlx4_err(mdev, "Failed allocating qp %d\n", ring->qpn);
 		goto err_reserve;
 	}
+	ring->qp.event = mlx4_en_sqp_event;
 
 	return 0;
 

drivers/net/mlx4/mlx4_en.h

@@ -538,6 +538,7 @@ int mlx4_en_poll_rx_cq(struct napi_struct *napi, int budget);
 void mlx4_en_fill_qp_context(struct mlx4_en_priv *priv, int size, int stride,
 			     int is_tx, int rss, int qpn, int cqn, int srqn,
 			     struct mlx4_qp_context *context);
+void mlx4_en_sqp_event(struct mlx4_qp *qp, enum mlx4_event event);
 int mlx4_en_map_buffer(struct mlx4_buf *buf);
 void mlx4_en_unmap_buffer(struct mlx4_buf *buf);