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Diffstat (limited to 'net/ipv6/ip6_tunnel.c')
-rw-r--r--net/ipv6/ip6_tunnel.c11
1 files changed, 6 insertions, 5 deletions
diff --git a/net/ipv6/ip6_tunnel.c b/net/ipv6/ip6_tunnel.c
index cc5d5e75b658..2fb4c6ad7243 100644
--- a/net/ipv6/ip6_tunnel.c
+++ b/net/ipv6/ip6_tunnel.c
@@ -1450,8 +1450,8 @@ static void ip6_tnl_link_config(struct ip6_tnl *t)
struct net_device *tdev = NULL;
struct __ip6_tnl_parm *p = &t->parms;
struct flowi6 *fl6 = &t->fl.u.ip6;
- unsigned int mtu;
int t_hlen;
+ int mtu;
__dev_addr_set(dev, &p->laddr, sizeof(struct in6_addr));
memcpy(dev->broadcast, &p->raddr, sizeof(struct in6_addr));
@@ -1498,12 +1498,13 @@ static void ip6_tnl_link_config(struct ip6_tnl *t)
dev->hard_header_len = tdev->hard_header_len + t_hlen;
mtu = min_t(unsigned int, tdev->mtu, IP6_MAX_MTU);
- dev->mtu = mtu - t_hlen;
+ mtu = mtu - t_hlen;
if (!(t->parms.flags & IP6_TNL_F_IGN_ENCAP_LIMIT))
- dev->mtu -= 8;
+ mtu -= 8;
- if (dev->mtu < IPV6_MIN_MTU)
- dev->mtu = IPV6_MIN_MTU;
+ if (mtu < IPV6_MIN_MTU)
+ mtu = IPV6_MIN_MTU;
+ WRITE_ONCE(dev->mtu, mtu);
}
}
}