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authorJarod Wilson <jarod@redhat.com>2016-10-20 13:55:17 -0400
committerDavid S. Miller <davem@davemloft.net>2016-10-20 14:51:08 -0400
commitf77f0aee4da4beff5042b49913e856539f23adff (patch)
tree841fd40b4a4953dd91cdac947964bc78571fd7ff /drivers/net/usb/usbnet.c
parentd894be57ca92c8a8819ab544d550809e8731137b (diff)
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 <woojung.huh@microchip.com> CC: Microchip Linux Driver Support <UNGLinuxDriver@microchip.com> CC: Hayes Wang <hayeswang@realtek.com> CC: Oliver Neukum <oneukum@suse.com> CC: Steve Glendinning <steve.glendinning@shawell.net> Signed-off-by: Jarod Wilson <jarod@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/usb/usbnet.c')
-rw-r--r--drivers/net/usb/usbnet.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/net/usb/usbnet.c b/drivers/net/usb/usbnet.c
index d5071e364d40..3de65ea6531a 100644
--- a/drivers/net/usb/usbnet.c
+++ b/drivers/net/usb/usbnet.c
@@ -384,8 +384,6 @@ int usbnet_change_mtu (struct net_device *net, int new_mtu)
int old_hard_mtu = dev->hard_mtu;
int old_rx_urb_size = dev->rx_urb_size;
- if (new_mtu <= 0)
- return -EINVAL;
// no second zero-length packet read wanted after mtu-sized packets
if ((ll_mtu % dev->maxpacket) == 0)
return -EDOM;
@@ -1669,6 +1667,8 @@ usbnet_probe (struct usb_interface *udev, const struct usb_device_id *prod)
* bind() should set rx_urb_size in that case.
*/
dev->hard_mtu = net->mtu + net->hard_header_len;
+ net->min_mtu = 0;
+ net->max_mtu = ETH_MAX_MTU;
net->netdev_ops = &usbnet_netdev_ops;
net->watchdog_timeo = TX_TIMEOUT_JIFFIES;