linux-kernel - [PATCH 3.16 03/63] Revert "vti4: Don't override MTU passed on link creation via IFLA

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Message-ID: <lsq.1537575342.130132461@decadent.org.uk>
Date:   Sat, 22 Sep 2018 01:15:42 +0100
From:   Ben Hutchings <ben@...adent.org.uk>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:     akpm@...ux-foundation.org,
        "Alistair Strachan" <astrachan@...gle.com>
Subject: [PATCH 3.16 03/63] Revert "vti4: Don't override MTU passed on
 link creation via IFLA_MTU"

3.16.58-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Ben Hutchings <ben@...adent.org.uk>

This reverts commit 5a79e43ffa5014c020e0d0f4e383205f87b10111, which
was commit 03080e5ec72740c1a62e6730f2a5f3f114f11b19 upstream, as it
causes test failures.  It should not have been backported to anything
older than 4.16.  Thanks to Alistair Strachan for debugging this.

Cc: Alistair Strachan <astrachan@...gle.com>
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 net/ipv4/ip_vti.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/net/ipv4/ip_vti.c b/net/ipv4/ip_vti.c
index b4fc9e710308..778ee1bf40ad 100644
--- a/net/ipv4/ip_vti.c
+++ b/net/ipv4/ip_vti.c
@@ -359,6 +359,7 @@ static int vti_tunnel_init(struct net_device *dev)
 	memcpy(dev->dev_addr, &iph->saddr, 4);
 	memcpy(dev->broadcast, &iph->daddr, 4);
 
+	dev->mtu		= ETH_DATA_LEN;
 	dev->flags		= IFF_NOARP;
 	dev->iflink		= 0;
 	dev->addr_len		= 4;