From: Petr Machata Date: Thu, 27 Jul 2023 15:59:20 +0000 (+0200) Subject: mlxsw: spectrum_nve: Do not take reference when looking up netdevice X-Git-Tag: v6.6.7~2079^2~301^2~5 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=16f8c846cd6f8c5c45392e0f3dde843983adb9ab;p=platform%2Fkernel%2Flinux-starfive.git mlxsw: spectrum_nve: Do not take reference when looking up netdevice mlxsw_sp_nve_fid_disable() is always called under RTNL. It is therefore safe to call __dev_get_by_index() to get the netdevice pointer without bumping the reference count, because we can be sure the netdevice is not going away. That then obviates the need to put the netdevice later in the function. Signed-off-by: Petr Machata Reviewed-by: Ido Schimmel Reviewed-by: Eric Dumazet Link: https://lore.kernel.org/r/341d1046f89d8d839d9d00e4a3d58cdc351e9397.1690471774.git.petrm@nvidia.com Signed-off-by: Jakub Kicinski --- diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_nve.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_nve.c index d2b57a0..5479a1c 100644 --- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_nve.c +++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_nve.c @@ -989,6 +989,9 @@ void mlxsw_sp_nve_fid_disable(struct mlxsw_sp *mlxsw_sp, int nve_ifindex; __be32 vni; + /* Necessary for __dev_get_by_index() below. */ + ASSERT_RTNL(); + mlxsw_sp_nve_flood_ip_flush(mlxsw_sp, fid); mlxsw_sp_nve_fdb_flush_by_fid(mlxsw_sp, fid_index); mlxsw_sp_nve_ipv6_addr_flush_by_fid(mlxsw_sp, fid_index); @@ -997,15 +1000,13 @@ void mlxsw_sp_nve_fid_disable(struct mlxsw_sp *mlxsw_sp, mlxsw_sp_fid_vni(fid, &vni))) goto out; - nve_dev = dev_get_by_index(mlxsw_sp_net(mlxsw_sp), nve_ifindex); + nve_dev = __dev_get_by_index(mlxsw_sp_net(mlxsw_sp), nve_ifindex); if (!nve_dev) goto out; mlxsw_sp_nve_fdb_clear_offload(mlxsw_sp, fid, nve_dev, vni); mlxsw_sp_fid_fdb_clear_offload(fid, nve_dev); - dev_put(nve_dev); - out: mlxsw_sp_fid_vni_clear(fid); mlxsw_sp_nve_tunnel_fini(mlxsw_sp);