netdev - [PATCH net-next 01/12] mlxsw: core: Prevent trap group setting if driver does not support EMAD

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Date:   Tue, 22 Feb 2022 19:16:52 +0200
From:   Ido Schimmel <idosch@...dia.com>
To:     netdev@...r.kernel.org
Cc:     davem@...emloft.net, kuba@...nel.org, petrm@...dia.com,
        jiri@...dia.com, danieller@...dia.com, vadimp@...dia.com,
        Ido Schimmel <idosch@...dia.com>
Subject: [PATCH net-next 01/12] mlxsw: core: Prevent trap group setting if driver does not support EMAD

From: Vadim Pasternak <vadimp@...dia.com>

Avoid trap group setting if driver is not capable of EMAD support.
For example, "mlxsw_minimal" driver works over I2C bus, overs which
EMADs cannot be sent.
Validation is performed by testing feature 'MLXSW_BUS_F_TXRX'.

Fixes: 74e0494d35ac ("mlxsw: core: Move basic_trap_groups_set() call out of EMAD init code")
Signed-off-by: Vadim Pasternak <vadimp@...dia.com>
Reviewed-by: Jiri Pirko <jiri@...dia.com>
Signed-off-by: Ido Schimmel <idosch@...dia.com>
---
 drivers/net/ethernet/mellanox/mlxsw/core.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/net/ethernet/mellanox/mlxsw/core.c b/drivers/net/ethernet/mellanox/mlxsw/core.c
index f45df5fbdcc0..1c6c1ea107a1 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/core.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/core.c
@@ -223,6 +223,9 @@ static int mlxsw_core_trap_groups_set(struct mlxsw_core *mlxsw_core)
 	int err;
 	int i;
 
+	if (!(mlxsw_core->bus->features & MLXSW_BUS_F_TXRX))
+		return 0;
+
 	for (i = 0; i < ARRAY_SIZE(mlxsw_core_trap_groups); i++) {
 		mlxsw_reg_htgt_pack(htgt_pl, mlxsw_core_trap_groups[i],
 				    MLXSW_REG_HTGT_INVALID_POLICER,
@@ -2522,6 +2525,9 @@ int mlxsw_core_trap_register(struct mlxsw_core *mlxsw_core,
 	char hpkt_pl[MLXSW_REG_HPKT_LEN];
 	int err;
 
+	if (!(mlxsw_core->bus->features & MLXSW_BUS_F_TXRX))
+		return 0;
+
 	err = mlxsw_core_listener_register(mlxsw_core, listener, priv,
 					   listener->enabled_on_register);
 	if (err)
@@ -2551,6 +2557,9 @@ void mlxsw_core_trap_unregister(struct mlxsw_core *mlxsw_core,
 {
 	char hpkt_pl[MLXSW_REG_HPKT_LEN];
 
+	if (!(mlxsw_core->bus->features & MLXSW_BUS_F_TXRX))
+		return;
+
 	if (!listener->is_event) {
 		mlxsw_reg_hpkt_pack(hpkt_pl, listener->dis_action,
 				    listener->trap_id, listener->dis_trap_group,
-- 
2.33.1