diff options
| author | Jarod Wilson <jarod@redhat.com> | 2016-10-20 13:55:17 -0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-10-20 14:51:08 -0400 |
| commit | f77f0aee4da4beff5042b49913e856539f23adff (patch) | |
| tree | 841fd40b4a4953dd91cdac947964bc78571fd7ff /drivers/net/usb/lan78xx.c | |
| parent | d894be57ca92c8a8819ab544d550809e8731137b (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/lan78xx.c')
| -rw-r--r-- | drivers/net/usb/lan78xx.c | 8 |
1 files changed, 3 insertions, 5 deletions
diff --git a/drivers/net/usb/lan78xx.c b/drivers/net/usb/lan78xx.c index 13f033cebf2d..c4e748e92db4 100644 --- a/drivers/net/usb/lan78xx.c +++ b/drivers/net/usb/lan78xx.c @@ -1980,11 +1980,6 @@ static int lan78xx_change_mtu(struct net_device *netdev, int new_mtu) int old_rx_urb_size = dev->rx_urb_size; int ret; - if (new_mtu > MAX_SINGLE_PACKET_SIZE) - return -EINVAL; - - 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; @@ -3388,6 +3383,9 @@ static int lan78xx_probe(struct usb_interface *intf, if (netdev->mtu > (dev->hard_mtu - netdev->hard_header_len)) netdev->mtu = dev->hard_mtu - netdev->hard_header_len; + /* MTU range: 68 - 9000 */ + netdev->max_mtu = MAX_SINGLE_PACKET_SIZE; + dev->ep_blkin = (intf->cur_altsetting)->endpoint + 0; dev->ep_blkout = (intf->cur_altsetting)->endpoint + 1; dev->ep_intr = (intf->cur_altsetting)->endpoint + 2; |