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Date: Wed, 21 Jun 2017 07:59:16 -0400 From: Vladislav Yasevich <vyasevich@...il.com> To: netdev@...r.kernel.org Cc: girish.moodalbail@...cle.com, Vladislav Yasevich <vyasevic@...hat.com> Subject: [PATCH V2 net 1/4] macvlan: Do not return error when setting the same mac address 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@...hat.com> --- drivers/net/macvlan.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/net/macvlan.c b/drivers/net/macvlan.c index 67bf7eb..de214fb 100644 --- a/drivers/net/macvlan.c +++ b/drivers/net/macvlan.c @@ -703,6 +703,10 @@ 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; -- 2.9.4
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