diff options
Diffstat (limited to 'net/ipv4/ipmr.c')
| -rw-r--r-- | net/ipv4/ipmr.c | 25 |
1 files changed, 17 insertions, 8 deletions
diff --git a/net/ipv4/ipmr.c b/net/ipv4/ipmr.c index 05ed336f798a..ed372f3983e5 100644 --- a/net/ipv4/ipmr.c +++ b/net/ipv4/ipmr.c @@ -124,8 +124,8 @@ static void ipmr_del_tunnel(struct net_device *dev, struct vifctl *v) dev = __dev_get_by_name(&init_net, "tunl0"); if (dev) { + const struct net_device_ops *ops = dev->netdev_ops; struct ifreq ifr; - mm_segment_t oldfs; struct ip_tunnel_parm p; memset(&p, 0, sizeof(p)); @@ -137,9 +137,13 @@ static void ipmr_del_tunnel(struct net_device *dev, struct vifctl *v) sprintf(p.name, "dvmrp%d", v->vifc_vifi); ifr.ifr_ifru.ifru_data = (__force void __user *)&p; - oldfs = get_fs(); set_fs(KERNEL_DS); - dev->do_ioctl(dev, &ifr, SIOCDELTUNNEL); - set_fs(oldfs); + if (ops->ndo_do_ioctl) { + mm_segment_t oldfs = get_fs(); + + set_fs(KERNEL_DS); + ops->ndo_do_ioctl(dev, &ifr, SIOCDELTUNNEL); + set_fs(oldfs); + } } } @@ -151,9 +155,9 @@ struct net_device *ipmr_new_tunnel(struct vifctl *v) dev = __dev_get_by_name(&init_net, "tunl0"); if (dev) { + const struct net_device_ops *ops = dev->netdev_ops; int err; struct ifreq ifr; - mm_segment_t oldfs; struct ip_tunnel_parm p; struct in_device *in_dev; @@ -166,9 +170,14 @@ struct net_device *ipmr_new_tunnel(struct vifctl *v) sprintf(p.name, "dvmrp%d", v->vifc_vifi); ifr.ifr_ifru.ifru_data = (__force void __user *)&p; - oldfs = get_fs(); set_fs(KERNEL_DS); - err = dev->do_ioctl(dev, &ifr, SIOCADDTUNNEL); - set_fs(oldfs); + if (ops->ndo_do_ioctl) { + mm_segment_t oldfs = get_fs(); + + set_fs(KERNEL_DS); + err = ops->ndo_do_ioctl(dev, &ifr, SIOCADDTUNNEL); + set_fs(oldfs); + } else + err = -EOPNOTSUPP; dev = NULL; |