ethernet: use net core MTU range checking in more drivers

Somehow, I missed a healthy number of ethernet drivers in the last pass.
Most of these drivers either were in need of an updated max_mtu to make
jumbo frames possible to enable again. In a few cases, also setting a
different min_mtu to match previous lower bounds. There are also a few
drivers that had no upper bounds checking, so they're getting a brand new
ETH_MAX_MTU that is identical to IP_MAX_MTU, but accessible by includes
all ethernet and ethernet-like drivers all have already.

acenic:
- min_mtu = 0, max_mtu = 9000

amazon/ena:
- min_mtu = 128, max_mtu = adapter->max_mtu

amd/xgbe:
- min_mtu = 0, max_mtu = 9000

sb1250:
- min_mtu = 0, max_mtu = 1518

cxgb3:
- min_mtu = 81, max_mtu = 65535

cxgb4:
- min_mtu = 81, max_mtu = 9600

cxgb4vf:
- min_mtu = 81, max_mtu = 65535

benet:
- min_mtu = 256, max_mtu = 9000

ibmveth:
- min_mtu = 68, max_mtu = 65535

ibmvnic:
- min_mtu = adapter->min_mtu, max_mtu = adapter->max_mtu
- remove now redundant ibmvnic_change_mtu

jme:
- min_mtu = 1280, max_mtu = 9202

mv643xx_eth:
- min_mtu = 64, max_mtu = 9500

mlxsw:
- min_mtu = 0, max_mtu = 65535
- Basically bypassing the core checks, and instead relying on dynamic
  checks in the respective switch drivers' ndo_change_mtu functions

ns83820:
- min_mtu = 0
- remove redundant ns83820_change_mtu, only checked for mtu > 1500

netxen:
- min_mtu = 0, max_mtu = 8000 (P2), max_mtu = 9600 (P3)

qlge:
- min_mtu = 1500, max_mtu = 9000
- driver only supports setting mtu to 1500 or 9000, so the core check only
  rules out < 1500 and > 9000, qlge_change_mtu still needs to check that
  the value is 1500 or 9000

qualcomm/emac:
- min_mtu = 46, max_mtu = 9194

xilinx_axienet:
- min_mtu = 64, max_mtu = 9000

Fixes: 61e84623ac ("net: centralize net_device min/max MTU checking")
CC: netdev@vger.kernel.org
CC: Jes Sorensen <jes@trained-monkey.org>
CC: Netanel Belgazal <netanel@annapurnalabs.com>
CC: Tom Lendacky <thomas.lendacky@amd.com>
CC: Santosh Raspatur <santosh@chelsio.com>
CC: Hariprasad S <hariprasad@chelsio.com>
CC: Sathya Perla <sathya.perla@broadcom.com>
CC: Ajit Khaparde <ajit.khaparde@broadcom.com>
CC: Sriharsha Basavapatna <sriharsha.basavapatna@broadcom.com>
CC: Somnath Kotur <somnath.kotur@broadcom.com>
CC: Thomas Falcon <tlfalcon@linux.vnet.ibm.com>
CC: John Allen <jallen@linux.vnet.ibm.com>
CC: Guo-Fu Tseng <cooldavid@cooldavid.org>
CC: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
CC: Jiri Pirko <jiri@mellanox.com>
CC: Ido Schimmel <idosch@mellanox.com>
CC: Manish Chopra <manish.chopra@qlogic.com>
CC: Sony Chacko <sony.chacko@qlogic.com>
CC: Rajesh Borundia <rajesh.borundia@qlogic.com>
CC: Timur Tabi <timur@codeaurora.org>
CC: Anirudha Sarangi <anirudh@xilinx.com>
CC: John Linn <John.Linn@xilinx.com>
Signed-off-by: Jarod Wilson <jarod@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/chelsio/cxgb3/cxgb3_main.c

@@ -2531,8 +2531,6 @@ static int cxgb_change_mtu(struct net_device *dev, int new_mtu)
 	struct adapter *adapter = pi->adapter;
 	int ret;
 
-	if (new_mtu < 81)	/* accommodate SACK */
-		return -EINVAL;
 	if ((ret = t3_mac_set_mtu(&pi->mac, new_mtu)))
 		return ret;
 	dev->mtu = new_mtu;
@@ -3295,6 +3293,8 @@ static int init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
 
 		netdev->netdev_ops = &cxgb_netdev_ops;
 		netdev->ethtool_ops = &cxgb_ethtool_ops;
+		netdev->min_mtu = 81;
+		netdev->max_mtu = ETH_MAX_MTU;
 	}
 
 	pci_set_drvdata(pdev, adapter);

drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c

@@ -2502,8 +2502,6 @@ static int cxgb_change_mtu(struct net_device *dev, int new_mtu)
 	int ret;
 	struct port_info *pi = netdev_priv(dev);
 
-	if (new_mtu < 81 || new_mtu > MAX_MTU)         /* accommodate SACK */
-		return -EINVAL;
 	ret = t4_set_rxmode(pi->adapter, pi->adapter->pf, pi->viid, new_mtu, -1,
 			    -1, -1, -1, true);
 	if (!ret)
@@ -4803,6 +4801,10 @@ static int init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
 
 		netdev->priv_flags |= IFF_UNICAST_FLT;
 
+		/* MTU range: 81 - 9600 */
+		netdev->min_mtu = 81;
+		netdev->max_mtu = MAX_MTU;
+
 		netdev->netdev_ops = &cxgb4_netdev_ops;
 #ifdef CONFIG_CHELSIO_T4_DCB
 		netdev->dcbnl_ops = &cxgb4_dcb_ops;

drivers/net/ethernet/chelsio/cxgb4vf/cxgb4vf_main.c

@@ -1108,10 +1108,6 @@ static int cxgb4vf_change_mtu(struct net_device *dev, int new_mtu)
 	int ret;
 	struct port_info *pi = netdev_priv(dev);
 
-	/* accommodate SACK */
-	if (new_mtu < 81)
-		return -EINVAL;
-
 	ret = t4vf_set_rxmode(pi->adapter, pi->viid, new_mtu,
 			      -1, -1, -1, -1, true);
 	if (!ret)
@@ -2966,6 +2962,8 @@ static int cxgb4vf_pci_probe(struct pci_dev *pdev,
 			netdev->features |= NETIF_F_HIGHDMA;
 
 		netdev->priv_flags |= IFF_UNICAST_FLT;
+		netdev->min_mtu = 81;
+		netdev->max_mtu = ETH_MAX_MTU;
 
 		netdev->netdev_ops = &cxgb4vf_netdev_ops;
 		netdev->ethtool_ops = &cxgb4vf_ethtool_ops;