As in previous commit, restore the default rx_buf_len value if the user
passes 0. Also initialise rx_buf_len_max.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
---
 drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c b/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c
index a5eefa28454c..3d3acc2b9402 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c
@@ -10,6 +10,9 @@
 #include "hns3_enet.h"
 #include "hns3_ethtool.h"
 
+#define RX_BUF_LEN_2K 2048
+#define RX_BUF_LEN_4K 4096
+
 /* tqp related stats */
 #define HNS3_TQP_STAT(_string, _member)	{			\
 	.stats_string = _string,				\
@@ -684,6 +687,7 @@ static void hns3_get_ringparam(struct net_device *netdev,
 	param->tx_pending = priv->ring[0].desc_num;
 	param->rx_pending = priv->ring[rx_queue_index].desc_num;
 	kernel_param->rx_buf_len = priv->ring[rx_queue_index].buf_size;
+	kernel_param->rx_buf_len_max = RX_BUF_LEN_4K;
 	kernel_param->tx_push = test_bit(HNS3_NIC_STATE_TX_PUSH_ENABLE,
 					 &priv->state);
 }
@@ -1113,9 +1117,6 @@ static int hns3_check_ringparam(struct net_device *ndev,
 				struct ethtool_ringparam *param,
 				struct kernel_ethtool_ringparam *kernel_param)
 {
-#define RX_BUF_LEN_2K 2048
-#define RX_BUF_LEN_4K 4096
-
 	struct hns3_nic_priv *priv = netdev_priv(ndev);
 
 	if (hns3_nic_resetting(ndev) || !priv->ring) {
@@ -1127,6 +1128,9 @@ static int hns3_check_ringparam(struct net_device *ndev,
 	if (param->rx_mini_pending || param->rx_jumbo_pending)
 		return -EINVAL;
 
+	if (!kernel_param->rx_buf_len)
+		kernel_param->rx_buf_len = RX_BUF_LEN_2K;
+
 	if (kernel_param->rx_buf_len != RX_BUF_LEN_2K &&
 	    kernel_param->rx_buf_len != RX_BUF_LEN_4K) {
 		netdev_err(ndev, "Rx buf len only support 2048 and 4096\n");
-- 
2.49.0