From: Greg Kroah-Hartman Date: Fri, 6 Apr 2018 07:45:56 +0000 (+0200) Subject: Revert "ip6_vti: adjust vti mtu according to mtu of lower device" X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=6bc3a54e06c66509a4e1fa4d2c8e0d5372b8a74e;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git Revert "ip6_vti: adjust vti mtu according to mtu of lower device" This reverts commit e6cfc525163ea3375113a9dcc234c2cdd8dbf643 which is commit 53c81e95df1793933f87748d36070a721f6cb287 upstream. Ben writes that there are a number of follow-on patches needed to fix this up, but they get complex to backport, and some custom fixes are needed, so let's just revert this and wait for a "real" set of patches to resolve this to be submitted if it is really needed. Reported-by: Ben Hutchings Cc: Petr Vorel Cc: Alexey Kodanev Cc: David S. Miller Cc: Stefano Brivio Signed-off-by: Greg Kroah-Hartman --- diff --git a/net/ipv6/ip6_vti.c b/net/ipv6/ip6_vti.c index 413f01be0c9b..bcdc2d557de1 100644 --- a/net/ipv6/ip6_vti.c +++ b/net/ipv6/ip6_vti.c @@ -626,7 +626,6 @@ static void vti6_link_config(struct ip6_tnl *t) { struct net_device *dev = t->dev; struct __ip6_tnl_parm *p = &t->parms; - struct net_device *tdev = NULL; memcpy(dev->dev_addr, &p->laddr, sizeof(struct in6_addr)); memcpy(dev->broadcast, &p->raddr, sizeof(struct in6_addr)); @@ -639,25 +638,6 @@ static void vti6_link_config(struct ip6_tnl *t) dev->flags |= IFF_POINTOPOINT; else dev->flags &= ~IFF_POINTOPOINT; - - if (p->flags & IP6_TNL_F_CAP_XMIT) { - int strict = (ipv6_addr_type(&p->raddr) & - (IPV6_ADDR_MULTICAST | IPV6_ADDR_LINKLOCAL)); - struct rt6_info *rt = rt6_lookup(t->net, - &p->raddr, &p->laddr, - p->link, strict); - - if (rt) - tdev = rt->dst.dev; - ip6_rt_put(rt); - } - - if (!tdev && p->link) - tdev = __dev_get_by_index(t->net, p->link); - - if (tdev) - dev->mtu = max_t(int, tdev->mtu - dev->hard_header_len, - IPV6_MIN_MTU); } /**