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Date:	Thu, 16 Jan 2014 00:10:44 +0100
From:	Antonio Quartulli <>
	Marek Lindner <>,
	Antonio Quartulli <>
Subject: [PATCH] batman-adv: fix batman-adv header overhead calculation

From: Marek Lindner <>

Batman-adv prepends a full ethernet header in addition to its own
header. This has to be reflected in the MTU calculation, especially
since the value is used to set dev->hard_header_len.

Introduced by 411d6ed93a5d0601980d3e5ce75de07c98e3a7de
("batman-adv: consider network coding overhead when calculating required mtu")

Reported-by: cmsv <>
Reported-by: Martin Hundebøll <>
Signed-off-by: Marek Lindner <>
Signed-off-by: Antonio Quartulli <>
 net/batman-adv/main.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/batman-adv/main.c b/net/batman-adv/main.c
index 1511f64..faba0f6 100644
--- a/net/batman-adv/main.c
+++ b/net/batman-adv/main.c
@@ -277,7 +277,7 @@ int batadv_max_header_len(void)
 			   sizeof(struct batadv_coded_packet));
-	return header_len;
+	return header_len + ETH_HLEN;

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