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>

2 files changed, 3 insertions, 12 deletions

diff --git a/drivers/net/ethernet/altera/altera_tse.h b/drivers/net/ethernet/altera/altera_tse.h
index e0052003d16f..9b640c8fbc28 100644
--- a/drivers/net/ethernet/altera/altera_tse.h
+++ b/drivers/net/ethernet/altera/altera_tse.h
@@ -443,7 +443,6 @@ struct altera_tse_private {
 	/* RX/TX MAC FIFO configs */
 	u32 tx_fifo_depth;
 	u32 rx_fifo_depth;
-	u32 max_mtu;
 
 	/* Hash filter settings */
 	u32 hash_filter;
diff --git a/drivers/net/ethernet/altera/altera_tse_main.c b/drivers/net/ethernet/altera/altera_tse_main.c
index bda31f308cc2..cc9787e33acf 100644
--- a/drivers/net/ethernet/altera/altera_tse_main.c
+++ b/drivers/net/ethernet/altera/altera_tse_main.c
@@ -994,20 +994,11 @@ static void tse_set_mac(struct altera_tse_private *priv, bool enable)
  */
 static int tse_change_mtu(struct net_device *dev, int new_mtu)
 {
-	struct altera_tse_private *priv = netdev_priv(dev);
-	unsigned int max_mtu = priv->max_mtu;
-	unsigned int min_mtu = ETH_ZLEN + ETH_FCS_LEN;
-
 	if (netif_running(dev)) {
 		netdev_err(dev, "must be stopped to change its MTU\n");
 		return -EBUSY;
 	}
 
-	if ((new_mtu < min_mtu) || (new_mtu > max_mtu)) {
-		netdev_err(dev, "invalid MTU, max MTU is: %u\n", max_mtu);
-		return -EINVAL;
-	}
-
 	dev->mtu = new_mtu;
 	netdev_update_features(dev);
 
@@ -1446,15 +1437,16 @@ static int altera_tse_probe(struct platform_device *pdev)
 		of_property_read_bool(pdev->dev.of_node,
 				      "altr,has-supplementary-unicast");
 
+	priv->dev->min_mtu = ETH_ZLEN + ETH_FCS_LEN;
 	/* Max MTU is 1500, ETH_DATA_LEN */
-	priv->max_mtu = ETH_DATA_LEN;
+	priv->dev->max_mtu = ETH_DATA_LEN;
 
 	/* Get the max mtu from the device tree. Note that the
 	 * "max-frame-size" parameter is actually max mtu. Definition
 	 * in the ePAPR v1.1 spec and usage differ, so go with usage.
 	 */
 	of_property_read_u32(pdev->dev.of_node, "max-frame-size",
-			     &priv->max_mtu);
+			     &priv->dev->max_mtu);
 
 	/* The DMA buffer size already accounts for an alignment bias
 	 * to avoid unaligned access exceptions for the NIOS processor,