[PATCH 4/9] impr: use ->ndo_tunnel_ctl in ipmr_new_tunnel

[Christoph Hellwig]

Use the new ->ndo_tunnel_ctl instead of overriding the address limit
and using ->ndo_do_ioctl just to do a pointless user copy.

Signed-off-by: Christoph Hellwig <h...@lst.de>
---
 net/ipv4/ipmr.c | 14 +++-----------
 1 file changed, 3 insertions(+), 11 deletions(-)

diff --git a/net/ipv4/ipmr.c b/net/ipv4/ipmr.c
index cd1a3260a99af..d3e9b80a57de2 100644
--- a/net/ipv4/ipmr.c
+++ b/net/ipv4/ipmr.c
@@ -442,8 +442,6 @@ static struct net_device *ipmr_new_tunnel(struct net *net, 
struct vifctl *v)
 {
        struct net_device *tunnel_dev, *new_dev;
        struct ip_tunnel_parm p = { };
-       mm_segment_t oldfs = get_fs();
-       struct ifreq ifr;
        int err;
 
        tunnel_dev = __dev_get_by_name(net, "tunl0");
@@ -456,15 +454,11 @@ static struct net_device *ipmr_new_tunnel(struct net 
*net, struct vifctl *v)
        p.iph.ihl = 5;
        p.iph.protocol = IPPROTO_IPIP;
        sprintf(p.name, "dvmrp%d", v->vifc_vifi);
-       ifr.ifr_ifru.ifru_data = (__force void __user *)&p;
 
-       if (!tunnel_dev->netdev_ops->ndo_do_ioctl)
+       if (!tunnel_dev->netdev_ops->ndo_tunnel_ctl)
                goto out;
-
-       set_fs(KERNEL_DS);
-       err = tunnel_dev->netdev_ops->ndo_do_ioctl(tunnel_dev, &ifr,
+       err = tunnel_dev->netdev_ops->ndo_tunnel_ctl(tunnel_dev, &p,
                        SIOCADDTUNNEL);
-       set_fs(oldfs);
        if (err)
                goto out;
 
@@ -481,10 +475,8 @@ static struct net_device *ipmr_new_tunnel(struct net *net, 
struct vifctl *v)
        err = dev_set_allmulti(new_dev, 1);
        if (err) {
                dev_close(new_dev);
-               set_fs(KERNEL_DS);
-               tunnel_dev->netdev_ops->ndo_do_ioctl(tunnel_dev, &ifr,
+               tunnel_dev->netdev_ops->ndo_tunnel_ctl(tunnel_dev, &p,
                                SIOCDELTUNNEL);
-               set_fs(oldfs);
                dev_put(new_dev);
                new_dev = ERR_PTR(err);
        }
-- 
2.26.2