diff options
Diffstat (limited to 'drivers/net/usb/cdc_ncm.c')
| -rw-r--r-- | drivers/net/usb/cdc_ncm.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/drivers/net/usb/cdc_ncm.c b/drivers/net/usb/cdc_ncm.c index 2fb31edab125..877c9516e781 100644 --- a/drivers/net/usb/cdc_ncm.c +++ b/drivers/net/usb/cdc_ncm.c @@ -740,12 +740,14 @@ static void cdc_ncm_free(struct cdc_ncm_ctx *ctx) int cdc_ncm_change_mtu(struct net_device *net, int new_mtu) { struct usbnet *dev = netdev_priv(net); - struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0]; - int maxmtu = ctx->max_datagram_size - cdc_ncm_eth_hlen(dev); + int maxmtu = cdc_ncm_max_dgram_size(dev) - cdc_ncm_eth_hlen(dev); if (new_mtu <= 0 || new_mtu > maxmtu) return -EINVAL; + net->mtu = new_mtu; + cdc_ncm_set_dgram_size(dev, new_mtu + cdc_ncm_eth_hlen(dev)); + return 0; } EXPORT_SYMBOL_GPL(cdc_ncm_change_mtu); @@ -852,6 +854,13 @@ int cdc_ncm_bind_common(struct usbnet *dev, struct usb_interface *intf, u8 data_ if (cdc_ncm_init(dev)) goto error2; + /* Some firmwares need a pause here or they will silently fail + * to set up the interface properly. This value was decided + * empirically on a Sierra Wireless MC7455 running 02.08.02.00 + * firmware. + */ + usleep_range(10000, 20000); + /* configure data interface */ temp = usb_set_interface(dev->udev, iface_no, data_altsetting); if (temp) { |
