netdev - [PATCH] net: smsc95xx: Fix MTU range

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Date:   Thu,  8 Nov 2018 20:38:26 +0100
From:   Stefan Wahren <stefan.wahren@...e.com>
To:     "David S. Miller" <davem@...emloft.net>,
        Steve Glendinning <steve.glendinning@...well.net>
Cc:     UNGLinuxDriver@...rochip.com,
        Raghuram Chary J <RaghuramChary.Jallipalli@...rochip.com>,
        netdev@...r.kernel.org, linux-usb@...r.kernel.org,
        Stefan Wahren <stefan.wahren@...e.com>
Subject: [PATCH] net: smsc95xx: Fix MTU range

The commit f77f0aee4da4 ("net: use core MTU range checking in USB NIC
drivers") introduce a common MTU handling for usbnet. But it's missing
the necessary changes for smsc95xx. So set the MTU range accordingly.

This patch has been tested on a Raspberry Pi 3.

Fixes: f77f0aee4da4 ("net: use core MTU range checking in USB NIC drivers")
Signed-off-by: Stefan Wahren <stefan.wahren@...e.com>
---
 drivers/net/usb/smsc95xx.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/usb/smsc95xx.c b/drivers/net/usb/smsc95xx.c
index 262e7a3..5974478 100644
--- a/drivers/net/usb/smsc95xx.c
+++ b/drivers/net/usb/smsc95xx.c
@@ -1321,6 +1321,8 @@ static int smsc95xx_bind(struct usbnet *dev, struct usb_interface *intf)
 	dev->net->ethtool_ops = &smsc95xx_ethtool_ops;
 	dev->net->flags |= IFF_MULTICAST;
 	dev->net->hard_header_len += SMSC95XX_TX_OVERHEAD_CSUM;
+	dev->net->min_mtu = ETH_MIN_MTU;
+	dev->net->max_mtu = ETH_DATA_LEN;
 	dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
 
 	pdata->dev = dev;
-- 
2.7.4