net: bridge: don't recurse on the port's netdev ops lock

port_cost() calls __ethtool_get_link_ksettings() on the port device,
which will soon take the port's ops lock. br_port_carrier_check()
is reached via the NETDEV_CHANGE notifier from linkwatch, which
already holds the port's ops lock, so the call would deadlock.

Make port_cost() expect the port's ops lock held and switch to
netif_get_link_ksettings(). The only other caller is new_nbp(),
make sure it takes the lock explicitly.

Reviewed-by: Nicolai Buchwitz <nb@tipi-net.de>
Acked-by: Nikolay Aleksandrov <razor@blackwall.org>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Link: https://patch.msgid.link/20260603012840.2254293-8-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

0 files changed, 0 insertions, 0 deletions