netdev - [PATCH 01/50] eth: reset addr_assign_type if eth_mac

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Date:	Wed,  8 Feb 2012 22:10:08 +0100
From:	Danny Kukawka <danny.kukawka@...ect.de>
To:	"David S. Miller" <davem@...emloft.net>
Cc:	Danny Kukawka <dkukawka@...e.de>, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 01/50] eth: reset addr_assign_type if eth_mac_addr() called

If eth_mac_addr() get called, usually if SIOCSIFHWADDR was
used to change the MAC of a ethernet device, reset the
addr_assign_type to NET_ADDR_PERM if the state was
NET_ADDR_RANDOM before. Reset the state since the MAC is
no longer random at least not from the kernel side.

Signed-off-by: Danny Kukawka <danny.kukawka@...ect.de>
---
 net/ethernet/eth.c |    4 ++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/net/ethernet/eth.c b/net/ethernet/eth.c
index a246836..9d68142 100644
--- a/net/ethernet/eth.c
+++ b/net/ethernet/eth.c
@@ -288,6 +288,10 @@ int eth_mac_addr(struct net_device *dev, void *p)
 	if (!is_valid_ether_addr(addr->sa_data))
 		return -EADDRNOTAVAIL;
 	memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
+	/* if device marked as NET_ADDR_RANDOM, reset it */
+	if (dev->addr_assign_type & NET_ADDR_RANDOM)
+		dev->addr_assign_type ^= NET_ADDR_RANDOM;
+
 	return 0;
 }
 EXPORT_SYMBOL(eth_mac_addr);
-- 
1.7.7.3

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