net: hinic: Set max_mtu/min_mtu directly to simplify the code.

Set max_mtu/min_mtu directly to avoid making the validity judgment
when set mtu, because the judgment is made in net/core: dev_validate_mtu,
so to simplify the code.
Signed-off-by: caihuoqing <cai.huoqing@linux.dev>
Link: https://lore.kernel.org/r/20221024103349.4494-1-cai.huoqing@linux.devSigned-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/huawei/hinic/hinic_dev.h

@@ -22,6 +22,10 @@
 
 #define LP_PKT_CNT		64
 
+#define HINIC_MAX_JUMBO_FRAME_SIZE      15872
+#define HINIC_MAX_MTU_SIZE      (HINIC_MAX_JUMBO_FRAME_SIZE - ETH_HLEN - ETH_FCS_LEN)
+#define HINIC_MIN_MTU_SIZE      256
+
 enum hinic_flags {
 	HINIC_LINK_UP = BIT(0),
 	HINIC_INTF_UP = BIT(1),

drivers/net/ethernet/huawei/hinic/hinic_main.c

@@ -1187,7 +1187,8 @@ static int nic_dev_init(struct pci_dev *pdev)
 	else
 		netdev->netdev_ops = &hinicvf_netdev_ops;
 
-	netdev->max_mtu = ETH_MAX_MTU;
+	netdev->max_mtu = HINIC_MAX_MTU_SIZE;
+	netdev->min_mtu = HINIC_MIN_MTU_SIZE;
 
 	nic_dev = netdev_priv(netdev);
 	nic_dev->netdev = netdev;

drivers/net/ethernet/huawei/hinic/hinic_port.c

@@ -17,9 +17,6 @@
 #include "hinic_port.h"
 #include "hinic_dev.h"
 
-#define HINIC_MIN_MTU_SIZE              256
-#define HINIC_MAX_JUMBO_FRAME_SIZE      15872
-
 enum mac_op {
 	MAC_DEL,
 	MAC_SET,
@@ -147,24 +144,12 @@ int hinic_port_get_mac(struct hinic_dev *nic_dev, u8 *addr)
  **/
 int hinic_port_set_mtu(struct hinic_dev *nic_dev, int new_mtu)
 {
-	struct net_device *netdev = nic_dev->netdev;
 	struct hinic_hwdev *hwdev = nic_dev->hwdev;
 	struct hinic_port_mtu_cmd port_mtu_cmd;
 	struct hinic_hwif *hwif = hwdev->hwif;
 	u16 out_size = sizeof(port_mtu_cmd);
 	struct pci_dev *pdev = hwif->pdev;
-	int err, max_frame;
-
-	if (new_mtu < HINIC_MIN_MTU_SIZE) {
-		netif_err(nic_dev, drv, netdev, "mtu < MIN MTU size");
-		return -EINVAL;
-	}
-
-	max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
-	if (max_frame > HINIC_MAX_JUMBO_FRAME_SIZE) {
-		netif_err(nic_dev, drv, netdev, "mtu > MAX MTU size");
-		return -EINVAL;
-	}
+	int err;
 
 	port_mtu_cmd.func_idx = HINIC_HWIF_FUNC_IDX(hwif);
 	port_mtu_cmd.mtu = new_mtu;