From: Mark Bloch __esw_offloads_load_rep() may return success without invoking the representor load callback when the representor type is already loaded. On a later load failure, mlx5_esw_offloads_rep_load() unconditionally unloaded all previously iterated representor types. This could unload representor types that were already loaded before this load attempt. Track which representor types were actually loaded by the current call and unwind only those on error. Also restore the representor state back to REP_REGISTERED when the load callback itself fails. Signed-off-by: Mark Bloch Signed-off-by: Tariq Toukan --- .../mellanox/mlx5/core/eswitch_offloads.c | 38 ++++++++++++++----- 1 file changed, 29 insertions(+), 9 deletions(-) diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c index d4ac07c995b9..8f656253981b 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c @@ -2786,13 +2786,28 @@ void esw_offloads_cleanup(struct mlx5_eswitch *esw) } static int __esw_offloads_load_rep(struct mlx5_eswitch *esw, - struct mlx5_eswitch_rep *rep, u8 rep_type) + struct mlx5_eswitch_rep *rep, + u8 rep_type, bool *newly_loaded) { + int err; + mlx5_esw_assert_reps_locked(esw); + if (newly_loaded) + *newly_loaded = false; + if (atomic_cmpxchg(&rep->rep_data[rep_type].state, - REP_REGISTERED, REP_LOADED) == REP_REGISTERED) - return esw->offloads.rep_ops[rep_type]->load(esw->dev, rep); + REP_REGISTERED, REP_LOADED) != REP_REGISTERED) + return 0; + + err = esw->offloads.rep_ops[rep_type]->load(esw->dev, rep); + if (err) { + atomic_set(&rep->rep_data[rep_type].state, REP_REGISTERED); + return err; + } + + if (newly_loaded) + *newly_loaded = true; return 0; } @@ -2822,22 +2837,27 @@ static void __unload_reps_all_vport(struct mlx5_eswitch *esw, u8 rep_type) static int mlx5_esw_offloads_rep_load(struct mlx5_eswitch *esw, u16 vport_num) { struct mlx5_eswitch_rep *rep; + unsigned long loaded = 0; + bool newly_loaded; int rep_type; int err; rep = mlx5_eswitch_get_rep(esw, vport_num); for (rep_type = 0; rep_type < NUM_REP_TYPES; rep_type++) { - err = __esw_offloads_load_rep(esw, rep, rep_type); + err = __esw_offloads_load_rep(esw, rep, rep_type, + &newly_loaded); if (err) goto err_reps; + if (newly_loaded) + loaded |= BIT(rep_type); } return 0; err_reps: - atomic_set(&rep->rep_data[rep_type].state, REP_REGISTERED); - for (--rep_type; rep_type >= 0; rep_type--) - __esw_offloads_unload_rep(esw, rep, rep_type); + while (--rep_type >= 0) + if (test_bit(rep_type, &loaded)) + __esw_offloads_unload_rep(esw, rep, rep_type); return err; } @@ -3591,13 +3611,13 @@ int mlx5_eswitch_reload_ib_reps(struct mlx5_eswitch *esw) if (atomic_read(&rep->rep_data[REP_ETH].state) != REP_LOADED) return 0; - ret = __esw_offloads_load_rep(esw, rep, REP_IB); + ret = __esw_offloads_load_rep(esw, rep, REP_IB, NULL); if (ret) return ret; mlx5_esw_for_each_rep(esw, i, rep) { if (atomic_read(&rep->rep_data[REP_ETH].state) == REP_LOADED) - __esw_offloads_load_rep(esw, rep, REP_IB); + __esw_offloads_load_rep(esw, rep, REP_IB, NULL); } return 0; -- 2.44.0