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-rw-r--r--net/decnet/dn_route.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/net/decnet/dn_route.c b/net/decnet/dn_route.c
index db486796324..94f4ec03666 100644
--- a/net/decnet/dn_route.c
+++ b/net/decnet/dn_route.c
@@ -827,7 +827,9 @@ static unsigned int dn_dst_default_advmss(const struct dst_entry *dst)
static unsigned int dn_dst_mtu(const struct dst_entry *dst)
{
- return dst->dev->mtu;
+ unsigned int mtu = dst_metric_raw(dst, RTAX_MTU);
+
+ return mtu ? : dst->dev->mtu;
}
static struct neighbour *dn_dst_neigh_lookup(const struct dst_entry *dst, const void *daddr)