From 44770e1180decf9b483d9b537fdad385a4fbf462 Mon Sep 17 00:00:00 2001
From: Jarod Wilson <jarod@redhat.com>
Date: Mon, 17 Oct 2016 15:54:17 -0400
Subject: ethernet: use core min/max MTU checking

et131x: min_mtu 64, max_mtu 9216

altera_tse: min_mtu 64, max_mtu 1500

amd8111e: min_mtu 60, max_mtu 9000

bnad: min_mtu 46, max_mtu 9000

macb: min_mtu 68, max_mtu 1500 or 10240 depending on hardware capability

xgmac: min_mtu 46, max_mtu 9000

cxgb2: min_mtu 68, max_mtu 9582 (pm3393) or 9600 (vsc7326)

enic: min_mtu 68, max_mtu 9000

gianfar: min_mtu 50, max_mu 9586

hns_enet: min_mtu 68, max_mtu 9578 (v1) or 9706 (v2)

ksz884x: min_mtu 60, max_mtu 1894

myri10ge: min_mtu 68, max_mtu 9000

natsemi: min_mtu 64, max_mtu 2024

nfp: min_mtu 68, max_mtu hardware-specific

forcedeth: min_mtu 64, max_mtu 1500 or 9100, depending on hardware

pch_gbe: min_mtu 46, max_mtu 10300

pasemi_mac: min_mtu 64, max_mtu 9000

qcaspi: min_mtu 46, max_mtu 1500
- remove qcaspi_netdev_change_mtu as it is now redundant

rocker: min_mtu 68, max_mtu 9000

sxgbe: min_mtu 68, max_mtu 9000

stmmac: min_mtu 46, max_mtu depends on hardware

tehuti: min_mtu 60, max_mtu 16384
- driver had no max mtu checking, but product docs say 16k jumbo packets
  are supported by the hardware

netcp: min_mtu 68, max_mtu 9486
- remove netcp_ndo_change_mtu as it is now redundant

via-velocity: min_mtu 64, max_mtu 9000

octeon: min_mtu 46, max_mtu 65370

CC: netdev@vger.kernel.org
CC: Mark Einon <mark.einon@gmail.com>
CC: Vince Bridgers <vbridger@opensource.altera.com>
CC: Rasesh Mody <rasesh.mody@qlogic.com>
CC: Nicolas Ferre <nicolas.ferre@atmel.com>
CC: Santosh Raspatur <santosh@chelsio.com>
CC: Hariprasad S <hariprasad@chelsio.com>
CC:  Christian Benvenuti <benve@cisco.com>
CC: Sujith Sankar <ssujith@cisco.com>
CC: Govindarajulu Varadarajan <_govind@gmx.com>
CC: Neel Patel <neepatel@cisco.com>
CC: Claudiu Manoil <claudiu.manoil@freescale.com>
CC: Yisen Zhuang <yisen.zhuang@huawei.com>
CC: Salil Mehta <salil.mehta@huawei.com>
CC: Hyong-Youb Kim <hykim@myri.com>
CC: Jakub Kicinski <jakub.kicinski@netronome.com>
CC: Olof Johansson <olof@lixom.net>
CC: Jiri Pirko <jiri@resnulli.us>
CC: Byungho An <bh74.an@samsung.com>
CC: Girish K S <ks.giri@samsung.com>
CC: Vipul Pandya <vipul.pandya@samsung.com>
CC: Giuseppe Cavallaro <peppe.cavallaro@st.com>
CC: Alexandre Torgue <alexandre.torgue@st.com>
CC: Andy Gospodarek <andy@greyhouse.net>
CC: Wingman Kwok <w-kwok2@ti.com>
CC: Murali Karicheri <m-karicheri2@ti.com>
CC: Francois Romieu <romieu@fr.zoreil.com>
Signed-off-by: Jarod Wilson <jarod@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/ethernet/chelsio/cxgb/cxgb2.c | 18 ++++++++++++++++--
 1 file changed, 16 insertions(+), 2 deletions(-)

(limited to 'drivers/net/ethernet/chelsio/cxgb/cxgb2.c')

diff --git a/drivers/net/ethernet/chelsio/cxgb/cxgb2.c b/drivers/net/ethernet/chelsio/cxgb/cxgb2.c
index f5f1b0b51ebd..81d1d0bc7553 100644
--- a/drivers/net/ethernet/chelsio/cxgb/cxgb2.c
+++ b/drivers/net/ethernet/chelsio/cxgb/cxgb2.c
@@ -825,8 +825,6 @@ static int t1_change_mtu(struct net_device *dev, int new_mtu)
 
 	if (!mac->ops->set_mtu)
 		return -EOPNOTSUPP;
-	if (new_mtu < 68)
-		return -EINVAL;
 	if ((ret = mac->ops->set_mtu(mac, new_mtu)))
 		return ret;
 	dev->mtu = new_mtu;
@@ -1101,6 +1099,22 @@ static int init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
 		netif_napi_add(netdev, &adapter->napi, t1_poll, 64);
 
 		netdev->ethtool_ops = &t1_ethtool_ops;
+
+		switch (bi->board) {
+		case CHBT_BOARD_CHT110:
+		case CHBT_BOARD_N110:
+		case CHBT_BOARD_N210:
+		case CHBT_BOARD_CHT210:
+			netdev->max_mtu = PM3393_MAX_FRAME_SIZE -
+					  (ETH_HLEN + ETH_FCS_LEN);
+			break;
+		case CHBT_BOARD_CHN204:
+			netdev->max_mtu = VSC7326_MAX_MTU;
+			break;
+		default:
+			netdev->max_mtu = ETH_DATA_LEN;
+			break;
+		}
 	}
 
 	if (t1_init_sw_modules(adapter, bi) < 0) {
-- 
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