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net: fix net device address assign type

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Commit ad72c4a06a introduced optimization to return from function
quickly if the MAC address is not changing at all. It was reported
that such change causes dev->addr_assign_type to not change
to NET_ADDR_SET from _PERM or _RANDOM.
Restore the old behavior and skip only call to ndo_set_mac_address.

Fixes: ad72c4a06a ("net: add check for current MAC address in dev_set_mac_address")
Reported-by: Gal Pressman <gal@nvidia.com>
Signed-off-by: Piotr Gardocki <piotrx.gardocki@intel.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Link: https://lore.kernel.org/r/20230621132106.991342-1-piotrx.gardocki@intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Piotr Gardocki 2023-06-21 15:21:06 +02:00 committed by Jakub Kicinski
parent 9a14f2e3da
commit 0ec92a8f56
1 changed files with 5 additions and 5 deletions
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10
net/core/dev.c
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@ -8781,14 +8781,14 @@ int dev_set_mac_address(struct net_device *dev, struct sockaddr *sa,
return -EINVAL;
if (!netif_device_present(dev))
return -ENODEV;
if (!memcmp(dev->dev_addr, sa->sa_data, dev->addr_len))
return 0;
err = dev_pre_changeaddr_notify(dev, sa->sa_data, extack);
if (err)
return err;
err = ops->ndo_set_mac_address(dev, sa);
if (err)
return err;
if (memcmp(dev->dev_addr, sa->sa_data, dev->addr_len)) {
err = ops->ndo_set_mac_address(dev, sa);
if (err)
return err;
}
dev->addr_assign_type = NET_ADDR_SET;
call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
add_device_randomness(dev->dev_addr, dev->addr_len);