netdev - [PATCH] batman-adv: fix batman-adv header overhead calculation

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Message-Id: <1389827444-3911-2-git-send-email-antonio@meshcoding.com>
Date:	Thu, 16 Jan 2014 00:10:44 +0100
From:	Antonio Quartulli <antonio@...hcoding.com>
To:	davem@...emloft.net
Cc:	netdev@...r.kernel.org, b.a.t.m.a.n@...ts.open-mesh.org,
	Marek Lindner <mareklindner@...mailbox.ch>,
	Antonio Quartulli <antonio@...hcoding.com>
Subject: [PATCH] batman-adv: fix batman-adv header overhead calculation

From: Marek Lindner <mareklindner@...mailbox.ch>

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 <cmsv@...elesspt.net>
Reported-by: Martin Hundebøll <martin@...deboll.net>
Signed-off-by: Marek Lindner <mareklindner@...mailbox.ch>
Signed-off-by: Antonio Quartulli <antonio@...hcoding.com>
---
 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));
 #endif
 
-	return header_len;
+	return header_len + ETH_HLEN;
 }
 
 /**
-- 
1.8.5.3

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