From f77f0aee4da4beff5042b49913e856539f23adff Mon Sep 17 00:00:00 2001 From: Jarod Wilson Date: Thu, 20 Oct 2016 13:55:17 -0400 Subject: net: use core MTU range checking in USB NIC drivers usbnet: - Remove stale new_mtu <= 0 check in usbnet.c - Set min_mtu = 0, max_mtu = 65535 (sub-drivers must set their own max_mtu and/or min_mtu as needed) r8152: - Set appropriate max_mtu for different variants (1500 or 9194) lan78xx: - Set max_mtu = 9000 asix_driver: - max_mtu = 16384 for ax88178 variant ax88179: - max_mtu = 4088 cdc_ncm: - max_mtu from hardware cdc-phonet: - min_mtu = 6, max_mtu = 65541 sierra_net: - max_mtu = 1500, call usbnet_change_mtu directly - sierra_net_change_mtu checked for MTU > 1500, then called usbnet_change_mtu, but if we set max_mtu to let the network core handle the range check, then we can simply call usbnet_change_mtu directly smsc75xx: - max_mtu = 9000 CC: netdev@vger.kernel.org CC: Woojung Huh CC: Microchip Linux Driver Support CC: Hayes Wang CC: Oliver Neukum CC: Steve Glendinning Signed-off-by: Jarod Wilson Signed-off-by: David S. Miller --- drivers/net/usb/sierra_net.c | 13 ++----------- 1 file changed, 2 insertions(+), 11 deletions(-) (limited to 'drivers/net/usb/sierra_net.c') diff --git a/drivers/net/usb/sierra_net.c b/drivers/net/usb/sierra_net.c index a2515887..12071f1 100644 --- a/drivers/net/usb/sierra_net.c +++ b/drivers/net/usb/sierra_net.c @@ -165,7 +165,6 @@ struct lsi_umts { /* Forward definitions */ static void sierra_sync_timer(unsigned long syncdata); -static int sierra_net_change_mtu(struct net_device *net, int new_mtu); /* Our own net device operations structure */ static const struct net_device_ops sierra_net_device_ops = { @@ -173,7 +172,7 @@ static const struct net_device_ops sierra_net_device_ops = { .ndo_stop = usbnet_stop, .ndo_start_xmit = usbnet_start_xmit, .ndo_tx_timeout = usbnet_tx_timeout, - .ndo_change_mtu = sierra_net_change_mtu, + .ndo_change_mtu = usbnet_change_mtu, .ndo_set_mac_address = eth_mac_addr, .ndo_validate_addr = eth_validate_addr, }; @@ -622,15 +621,6 @@ static const struct ethtool_ops sierra_net_ethtool_ops = { .nway_reset = usbnet_nway_reset, }; -/* MTU can not be more than 1500 bytes, enforce it. */ -static int sierra_net_change_mtu(struct net_device *net, int new_mtu) -{ - if (new_mtu > SIERRA_NET_MAX_SUPPORTED_MTU) - return -EINVAL; - - return usbnet_change_mtu(net, new_mtu); -} - static int sierra_net_get_fw_attr(struct usbnet *dev, u16 *datap) { int result = 0; @@ -720,6 +710,7 @@ static int sierra_net_bind(struct usbnet *dev, struct usb_interface *intf) dev->net->hard_header_len += SIERRA_NET_HIP_EXT_HDR_LEN; dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len; + dev->net->max_mtu = SIERRA_NET_MAX_SUPPORTED_MTU; /* Set up the netdev */ dev->net->flags |= IFF_NOARP; -- cgit v1.1