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macvlan: Do not return error when setting the same mac address

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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>
This commit is contained in:
Vlad Yasevich 2017-06-21 07:59:16 -04:00 committed by David S. Miller
parent dfa523ae9f
commit e26f43faa0
1 changed files with 4 additions and 0 deletions
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4
drivers/net/macvlan.c
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@ -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;