[PATCH net-next 3/6] mlxsw: spectrum_matchall: Perform priority checks earlier

[Ido Schimmel]

From: Ido Schimmel <ido...@nvidia.com>

Perform the priority check earlier in the function instead of repeating
it for every action. This fixes a bug that allowed matchall rules with
sample action to be added in front of flower rules on egress.

Fixes: 54d0e963f683 ("mlxsw: spectrum_matchall: Add support for egress 
sampling")
Signed-off-by: Ido Schimmel <ido...@nvidia.com>
Reviewed-by: Jiri Pirko <j...@nvidia.com>
---
 .../mellanox/mlxsw/spectrum_matchall.c        | 31 ++++++++-----------
 1 file changed, 13 insertions(+), 18 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_matchall.c 
b/drivers/net/ethernet/mellanox/mlxsw/spectrum_matchall.c
index af0a20581a37..07b371cd9818 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_matchall.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_matchall.c
@@ -250,32 +250,27 @@ int mlxsw_sp_mall_replace(struct mlxsw_sp *mlxsw_sp,
        mall_entry->priority = f->common.prio;
        mall_entry->ingress = mlxsw_sp_flow_block_is_ingress_bound(block);
 
+       if (flower_prio_valid && mall_entry->ingress &&
+           mall_entry->priority >= flower_min_prio) {
+               NL_SET_ERR_MSG(f->common.extack, "Failed to add behind existing 
flower rules");
+               err = -EOPNOTSUPP;
+               goto errout;
+       }
+       if (flower_prio_valid && !mall_entry->ingress &&
+           mall_entry->priority <= flower_max_prio) {
+               NL_SET_ERR_MSG(f->common.extack, "Failed to add in front of 
existing flower rules");
+               err = -EOPNOTSUPP;
+               goto errout;
+       }
+
        act = &f->rule->action.entries[0];
 
        switch (act->id) {
        case FLOW_ACTION_MIRRED:
-               if (flower_prio_valid && mall_entry->ingress &&
-                   mall_entry->priority >= flower_min_prio) {
-                       NL_SET_ERR_MSG(f->common.extack, "Failed to add behind 
existing flower rules");
-                       err = -EOPNOTSUPP;
-                       goto errout;
-               }
-               if (flower_prio_valid && !mall_entry->ingress &&
-                   mall_entry->priority <= flower_max_prio) {
-                       NL_SET_ERR_MSG(f->common.extack, "Failed to add in 
front of existing flower rules");
-                       err = -EOPNOTSUPP;
-                       goto errout;
-               }
                mall_entry->type = MLXSW_SP_MALL_ACTION_TYPE_MIRROR;
                mall_entry->mirror.to_dev = act->dev;
                break;
        case FLOW_ACTION_SAMPLE:
-               if (flower_prio_valid &&
-                   mall_entry->priority >= flower_min_prio) {
-                       NL_SET_ERR_MSG(f->common.extack, "Failed to add behind 
existing flower rules");
-                       err = -EOPNOTSUPP;
-                       goto errout;
-               }
                mall_entry->type = MLXSW_SP_MALL_ACTION_TYPE_SAMPLE;
                mall_entry->sample.params.psample_group = 
act->sample.psample_group;
                mall_entry->sample.params.truncate = act->sample.truncate;
-- 
2.30.2