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Quentin Freimanis
5642b1648d
When the switch uses a random base MAC address it does not mark each
port's address as random:
$ dmesg | grep "MAC addr"
sparx5-switch e00c0000.switch: MAC addr was not set, use random MAC
$ cat /sys/class/net/eth0/addr_assign_type
0
0 is NET_ADDR_PERM, so userspace thinks this is a stable address.
With a random MAC reported as NET_ADDR_PERM, systemd's
MACAddressPolicy=persistent [1] leaves it unchanged, so a DHCP client
gets a new IP address every boot and a static reservation can't be used.
Reporting it as NET_ADDR_RANDOM makes systemd replace it with a stable
address derived from the interface name and machine-id.
Fixes: f3cad2611a ("net: sparx5: add hostmode with phylink support")
Signed-off-by: Quentin Freimanis <[email protected]>
Reviewed-by: Simon Horman <[email protected]>
Reviewed-by: Daniel Machon <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>