Similar to commit be809424659c ("selftests: bonding: do not set port down before adding to bond"). The bond-arp-interval-causes-panic test failed after commit a4abfa627c38 ("net: rtnetlink: Enslave device before bringing it up") as the kernel will set the port down _after_ adding to bond if setting port down specifically. Fix it by removing the link down operation when adding to bond. Fixes: 2ffd57327ff1 ("selftests: bonding: cause oops in bond_rr_gen_slave_id") Signed-off-by: Hangbin Liu <liuhangbin@gmail.com> Tested-by: Benjamin Poirier <benjamin.poirier@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>