netdev - [PATCH] ipv6 addrconf: Fix addrconf_ifid

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Message-Id: <1362687183-3425-1-git-send-email-alex.aring@gmail.com>
Date:	Thu,  7 Mar 2013 21:13:03 +0100
From:	Alexander Aring <alex.aring@...il.com>
To:	davem@...emloft.net
Cc:	kuznet@....inr.ac.ru, jmorris@...ei.org, yoshfuji@...ux-ipv6.org,
	linux-zigbee-devel@...ts.sourceforge.net, netdev@...r.kernel.org,
	Alexander Aring <alex.aring@...il.com>
Subject: [PATCH] ipv6 addrconf: Fix addrconf_ifid_eui64 of 802.15.4 devices

The function addrconf_ifid_eui64 will copy eui into dev->dev_addr.
We need first to manipulate eui[0] before we call memcpy afterwards.

Broken since commit:
5e98a36ed4bf6ea396170e3af0dd4fcbe51d772f

Since this commit I got many trouble with the ieee802154 stack.

Signed-off-by: Alexander Aring <alex.aring@...il.com>
---
 net/ipv6/addrconf.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index fa36a67..4460237 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -1731,8 +1731,8 @@ static int addrconf_ifid_eui64(u8 *eui, struct net_device *dev)
 {
 	if (dev->addr_len != IEEE802154_ADDR_LEN)
 		return -1;
-	memcpy(eui, dev->dev_addr, 8);
 	eui[0] ^= 2;
+	memcpy(eui, dev->dev_addr, 8);
 	return 0;
 }
 
-- 
1.8.1.5

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