diff options
| author | Jiri Pirko <jiri@mellanox.com> | 2019-05-29 09:59:44 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2019-05-30 21:30:47 +0200 |
| commit | ef74422020aa8c224b00a927e3e47faac4d8fae3 (patch) | |
| tree | a8701de675aa99c7bfa9c6561b491eba1c4516ea | |
| parent | net: dsa: mv88e6xxx: fix handling of upper half of STATS_TYPE_PORT (diff) | |
| download | linux-ef74422020aa8c224b00a927e3e47faac4d8fae3.tar.xz linux-ef74422020aa8c224b00a927e3e47faac4d8fae3.zip | |
mlxsw: spectrum_acl: Avoid warning after identical rules insertion
When identical rules are inserted, the latter one goes to C-TCAM. For
that, a second eRP with the same mask is created. These 2 eRPs by the
nature cannot be merged and also one cannot be parent of another.
Teach mlxsw_sp_acl_erp_delta_fill() about this possibility and handle it
gracefully.
Reported-by: Alex Kushnarov <alexanderk@mellanox.com>
Fixes: c22291f7cf45 ("mlxsw: spectrum: acl: Implement delta for ERP")
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlxsw/spectrum_acl_erp.c | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_acl_erp.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_acl_erp.c index c1a9cc9a3292..4c98950380d5 100644 --- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_acl_erp.c +++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_acl_erp.c @@ -1171,13 +1171,12 @@ mlxsw_sp_acl_erp_delta_fill(const struct mlxsw_sp_acl_erp_key *parent_key, return -EINVAL; } if (si == -1) { - /* The masks are the same, this cannot happen. - * That means the caller is broken. + /* The masks are the same, this can happen in case eRPs with + * the same mask were created in both A-TCAM and C-TCAM. + * The only possible condition under which this can happen + * is identical rule insertion. Delta is not possible here. */ - WARN_ON(1); - *delta_start = 0; - *delta_mask = 0; - return 0; + return -EINVAL; } pmask = (unsigned char) parent_key->mask[__MASK_IDX(si)]; mask = (unsigned char) key->mask[__MASK_IDX(si)]; |