net/mlx5: DR, Allow insertion of duplicate rules

Duplicate rules were not allowed to be configured with SW steering.
This restriction caused failures with the replace rule logic done by
upper layers.

This fix allows for multiple rules with the same match values, in
such case the first inserted rules will match.

Fixes: 41d07074154c ("net/mlx5: DR, Expose steering rule functionality")
Signed-off-by: Alex Vesker <valex@mellanox.com>
Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_rule.c b/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_rule.c
index 4187f2b..e8b6560 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_rule.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_rule.c
@@ -788,12 +788,10 @@ again:
                         * it means that all the previous stes are the same,
                         * if so, this rule is duplicated.
                         */
-                       if (mlx5dr_ste_is_last_in_rule(nic_matcher,
-                                                      matched_ste->ste_chain_location)) {
-                               mlx5dr_info(dmn, "Duplicate rule inserted, aborting!!\n");
-                               return NULL;
-                       }
-                       return matched_ste;
+                       if (!mlx5dr_ste_is_last_in_rule(nic_matcher, ste_location))
+                               return matched_ste;
+
+                       mlx5dr_dbg(dmn, "Duplicate rule inserted\n");
                }
 
                if (!skip_rehash && dr_rule_need_enlarge_hash(cur_htbl, dmn, nic_dmn)) {