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mlxsw: spectrum_router: Fix use of uninitialized adjacency index 

When mlxsw_sp_adj_discard_write() is called for the first time, the
value stored in 'mlxsw_sp->router->adj_discard_index' is invalid, as
indicated by 'mlxsw_sp->router->adj_discard_index_valid' being set to
'false'.

In this case, we should not use the value initially stored in
'mlxsw_sp->router->adj_discard_index' (0) and instead use the value
allocated later in the function.

Fixes: 983db6198f ("mlxsw: spectrum_router: Allocate discard adjacency entry when needed")
Signed-off-by: Amit Cohen <amitc@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
alistair/sunxi64-5.5-dsi
Amit Cohen 2019-11-24 09:48:03 +02:00 committed by Jakub Kicinski
parent c5731cc5eb
commit ed43cff065
1 changed files with 2 additions and 3 deletions
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5
drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
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@ -4221,7 +4221,6 @@ mlxsw_sp_fib_entry_ralue_pack(char *ralue_pl,
static int mlxsw_sp_adj_discard_write(struct mlxsw_sp *mlxsw_sp, u16 rif_index)
{
u32 adj_discard_index = mlxsw_sp->router->adj_discard_index;
enum mlxsw_reg_ratr_trap_action trap_action;
char ratr_pl[MLXSW_REG_RATR_LEN];
int err;
@ -4236,8 +4235,8 @@ static int mlxsw_sp_adj_discard_write(struct mlxsw_sp *mlxsw_sp, u16 rif_index)
trap_action = MLXSW_REG_RATR_TRAP_ACTION_DISCARD_ERRORS;
mlxsw_reg_ratr_pack(ratr_pl, MLXSW_REG_RATR_OP_WRITE_WRITE_ENTRY, true,
MLXSW_REG_RATR_TYPE_ETHERNET, adj_discard_index,
rif_index);
MLXSW_REG_RATR_TYPE_ETHERNET,
mlxsw_sp->router->adj_discard_index, rif_index);
mlxsw_reg_ratr_trap_action_set(ratr_pl, trap_action);
err = mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(ratr), ratr_pl);
if (err)