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mlxsw: spectrum_acl: Limit priority value

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In Spectrum-2, higher priority value wins and priority valid values are in
the range of {1,cap_kvd_size-1}. mlxsw_sp_acl_tcam_priority_get converts
from lower-bound priorities alike tc flower to Spectrum-2 HW range. Up
until now tc flower did not provide priority 0 or reached the maximal
value, however multicast routing does provide priority 0.

Therefore, Change mlxsw_sp_acl_tcam_priority_get to verify priority is in
the correct range. Make sure priority is never set to zero and never
exceeds the maximal allowed value.

Signed-off-by: Nir Dotan <nird@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Nir Dotan 2018-12-10 07:11:44 +00:00 committed by David S. Miller
parent c20580c21f
commit d7263ab35b
1 changed files with 3 additions and 2 deletions
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5
drivers/net/ethernet/mellanox/mlxsw/spectrum_acl_tcam.c
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@ -95,8 +95,9 @@ int mlxsw_sp_acl_tcam_priority_get(struct mlxsw_sp *mlxsw_sp,
if (!MLXSW_CORE_RES_VALID(mlxsw_sp->core, KVD_SIZE))
return -EIO;
max_priority = MLXSW_CORE_RES_GET(mlxsw_sp->core, KVD_SIZE);
if (rulei->priority > max_priority)
/* Priority range is 1..cap_kvd_size-1. */
max_priority = MLXSW_CORE_RES_GET(mlxsw_sp->core, KVD_SIZE) - 1;
if (rulei->priority >= max_priority)
return -EINVAL;
/* Unlike in TC, in HW, higher number means higher priority. */