| From | Sasha Levin <> | Subject | [PATCH AUTOSEL for 4.4 067/162] macvlan: Do not return error when setting the same mac address | Date | Mon, 9 Apr 2018 00:28:31 +0000 |
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From: Vlad Yasevich <vyasevich@gmail.com>
[ Upstream commit e26f43faa0d79dd06e9e94829696b68b9940c2ee ]
The user currently gets an EBUSY error when attempting to set the mac address on a macvlan device to the same value.
This should really be a no-op as nothing changes. Catch the condition and return early.
Signed-off-by: Vladislav Yasevich <vyasevic@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Sasha Levin <alexander.levin@microsoft.com> --- drivers/net/macvlan.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/drivers/net/macvlan.c b/drivers/net/macvlan.c index 9897cabec371..c0d143df4c79 100644 --- a/drivers/net/macvlan.c +++ b/drivers/net/macvlan.c @@ -693,6 +693,10 @@ static int macvlan_set_mac_address(struct net_device *dev, void *p) if (!is_valid_ether_addr(addr->sa_data)) return -EADDRNOTAVAIL; + /* If the addresses are the same, this is a no-op */ + if (ether_addr_equal(dev->dev_addr, addr->sa_data)) + return 0; + if (vlan->mode == MACVLAN_MODE_PASSTHRU) { dev_set_mac_address(vlan->lowerdev, addr); return 0; -- 2.15.1
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