diff options
Diffstat (limited to 'drivers/net/ethernet/qualcomm/rmnet/rmnet_config.c')
| -rw-r--r-- | drivers/net/ethernet/qualcomm/rmnet/rmnet_config.c | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/drivers/net/ethernet/qualcomm/rmnet/rmnet_config.c b/drivers/net/ethernet/qualcomm/rmnet/rmnet_config.c index fcdecddb2812..8d51b0cb545c 100644 --- a/drivers/net/ethernet/qualcomm/rmnet/rmnet_config.c +++ b/drivers/net/ethernet/qualcomm/rmnet/rmnet_config.c @@ -26,7 +26,7 @@ static int rmnet_is_real_dev_registered(const struct net_device *real_dev) } /* Needs rtnl lock */ -static struct rmnet_port* +struct rmnet_port* rmnet_get_port_rtnl(const struct net_device *real_dev) { return rtnl_dereference(real_dev->rx_handler_data); @@ -253,7 +253,10 @@ static int rmnet_config_notify_cb(struct notifier_block *nb, netdev_dbg(real_dev, "Kernel unregister\n"); rmnet_force_unassociate_device(real_dev); break; - + case NETDEV_CHANGEMTU: + if (rmnet_vnd_validate_real_dev_mtu(real_dev)) + return NOTIFY_BAD; + break; default: break; } @@ -329,9 +332,17 @@ static int rmnet_changelink(struct net_device *dev, struct nlattr *tb[], if (data[IFLA_RMNET_FLAGS]) { struct ifla_rmnet_flags *flags; + u32 old_data_format; + old_data_format = port->data_format; flags = nla_data(data[IFLA_RMNET_FLAGS]); port->data_format = flags->flags & flags->mask; + + if (rmnet_vnd_update_dev_mtu(port, real_dev)) { + port->data_format = old_data_format; + NL_SET_ERR_MSG_MOD(extack, "Invalid MTU on real dev"); + return -EINVAL; + } } return 0; |